PS-1 question papers

7/28/2019 PS-1 question papers

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Code No: C9911/RR RR

II B.Tech II Semester Supplementary Examinations, Apr/May 2012COMPUTER ORGANIZATION

( Common to Computer Science & Engineering, Information Technology,Computer Science & Systems Engineering and Electronics & Computer

Engineering)Time: 3 hours Max Marks: 80

Answer any FIVE QuestionsAll Questions carry equal marks

1. (a) Discuss about PCI bus arbitration

(b) List the merits and demerits of centralized and distributed bus arbitrations.[8+8]

2. (a) Perform the following subtractions on the following decimal numbers using 9scomplement representation.

i. 23-12

ii. 23-29

(b) A binary computer uses 36 bit registers to store numbers. Eight bits are usedfor the exponent and the exponent is represented in excess 64 form. Find theapproximate range of decimal numbers handled by this computer [6+10]

3. (a) List various data transfer operations of IBM S/370 system

(b) Explain about common transfer-of-control operations found in instruction sets.[8+8]

4. (a) List and describe integer arithmetic and logical instructions of Motorola 88000

(b) Discuss about functioning of Motorola 88000 instruction unit pipeline.[8+8]

5. (a) What is block hit ratio?

(b) Explain major variables on which hit ratio depends.(c) Discuss about FIFO replacement with two different memory capacities. Give

suitable example [3+3+10]

6. (a) Discuss the changes in memory and register for an interrupt in interrupt-drivenI/O.

(b) Differentiate between programmed I/O and interrupt-driven I/O.

(c) Explain about simple interrupt processing with the help of a flow chart.[6+4+6]

7. (a) Discuss about microinsturction execution.(b) Differentiate between packed and unpacked microinsturction

(c) Differentiate between hard and soft micro progaramming [6+5+5]

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8. Assume that 20 percent of the instructions executed on a computer are branchinstruction and delayed branching is used with one delay slot. Estimate the gainin performance if the complier is able to use 85 percent of the delay slots

[16]

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Code No: R22042

II B.Tech II Semester, Regular Examinations, April 2012

ELECTRO MAGNETIC WAVES AND TRANSMISSION LINES(Com. to ECE, EIE)

Time: 3 hours Max. Marks: 75

Answer any FIVE Questions

All Questions carry Equal Marks~~~~~~~~~~~--~~~~~~~~~~~

1. a) What are equipotential surfaces? Give two examples of these.b) A line charge L=400pC/m lies along the axis. The surface of zero potential passes through

the point (0, 5, 12) cm. Find the potential at point (2, 3, -4) m. (7M+8M)

2. a) State and explain Biot-Savarts law relating the magnetic field produced at a point due to thecurrent in a small elemental wire.

b) A thin ring of radius 5cm is placed on plane z=1 cm so that its center is at (0, 0, 1) cm. If thering carries 50 mA along a , find H at (i) (0, 0,-1) cm (ii) (0, 0, 10) cm. (7M+8M)

3. a) What is the Faradays law of induction? Explain the significance of the terms transformere.m.f and generator e.m.f.

b) In a medium of = 50, =2.50, resistivity =0.2 -m and E = 20V/m, find the conduction

current density. If this current density exists in a cylindrical rod of 2 cm diameter, evaluate the

current that can flow through the rod. (7M+8M)

4. a) Derive wave equation for source free regions.b) The electric field in free space is given by E=20 cos (10

8t+x) ay V/m

i) Find the direction of propagation

ii) Calculate and the time it takes to travel a distance of/2

iii) Sketch the wave at t=0, T/4 and T/2 (7M+8M)

5. a) Define surface impedance and explain how it exists.b) Derive expression for reflection and transmission coefficients of an EM wave when it is

incident normally on a dielectric. (7M+8M)

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6. a) Assuming z-direction of propagation in a parallel plane wave guide, determine theexpressions for the transverse field components in terms of partial derivation of EZ and HZ.b) Account for the presence of TE, TM and TEM waves in parallel plane wave guides and

explain their significance. (7M+8M)

7. a) Using the general line equations, obtain an expression for the input impedance of a line.b) A lossless transmission line has a capacitance of 50 pF/m and an inductance of 200nH/m.

Find the characteristics impedance for sections of a line 10m long and 500m long. (7M+8M)

8. a) Derive the expression for the voltage standing wave ratio from the transmission line theory.b) A 60 lossless line is connected to a source with 10v, Zg=50-j40, and terminated with a

load of j40. If the line is 100m long and =0.25rad/m, calculate Zin and voltage at

i) The sending end

ii) The receiving end

iii) 4m from the load end

iv) 3m from the source. (7M+8M)

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Answer any FIVE QuestionsAll Questions carry Equal Marks

~~~~~~~~~~~~~~~~~~~~~~~~

1. a) Using Gausss law derive expression for electric field intensity and electric flux density dueto an infinite sheet of charge density C/cm

b) A parallel plate capacitor has 250side plates of square shape separated by 5mm distance. A

sulphur slab of 6mm thickness with 4=r

is kept on the lower plate find the capacitance of

the set-up. If a voltage of 50volts is applied across the capacitor, calculate the voltage at both

the regions of the capacitor between the plates. (7M+8M)

2. a) The magnetic vector potential of a current distribution in free space is given byz

a

sin15

= eA Wb/m. Find H at ).10,4/,3( Also find the flux through

,2

05,

= .100 z

b) Derive an expression for magnetic vector potential A for surface currents. (7M+8M)

3. a) Describe the concept of displacement current with suitable example and derive theMaxwells equation which incorporates the displacement current.

b) A conducting circular loop of radius 20 cm lies in the z=0 plane in a magnetic filed

za377tcos10=B mWb/m

2. Calculate the induced voltage in the loop. (7M+8M)

4. a) Define uniform plane wave. Prove that uniform plane wave does not have field componentsin the direction of propagation.

b) If ,0,9 ==r for the medium in which a wave with a frequency of f= 0.3GHz is

propagating, determine the propagation constant and intrinsic impedance of the medium when

= 0. (7M+8M)

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5. A y-polarized uniform plane wave with fields (Ei, Hi) and a frequency of 75MHz propagates inair in the +x direction and impinges normally on a perfectly conducting plane at x= 0.

Assuming the amplitude of Ei to be 12mV/m, write the phasor and instantaneous expressions

for

a) Ei and Hi of the incident wave,

b) Er and Hr of the reflected wave and

c) ET and HT of the total wave in air, and

d) Determine the location nearest to the conducting plane, Where ET and HT are zero. (15M)

6. a) Define and derive the equations for phase and group velocities in a parallel plane guide. Onwhat factors do they depend?

b) A parallel plate wave guide made of two perfectly conducting infinite planes spaced 3cm

apart in air operates at a frequency of 10GHz. Find the maximum time average power that can

be propagated per unit width of the guide for TE10 and TM10 modes. (7M+8M)

7. a) Explain about the propagation constant in transmission lines.b) Explain the conditions which are used for minimum attenuation in transmission lines.

c) What is loading? Explain different types of loading in transmission lines. (4M+4M+7M)

8. a) Describe all the characteristics of UHF lines?b) Explain the significance and design of single stub impedance matching. Discuss the factors

on which stub length depends. (6M+9M)

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1. a) Define Gauss law. Apply Gauss law to derive the boundary conditions at a conductor-dielectric interface.

b) Derive an expression for the capacitance of a parallel plate capacitor containing two

dielectrics with the dielectric interface parallel to the conducting plates. (7M+8M)

2. a) Show that the magnetic field due a finite current element along z-axis at a point P, rdistance away along y-axis is given by aSinSinrH ))(2/1( 21 = . Where I is the current

through the conductor, 1,2 are the angles made by the tips of the conductor element at P

b) State Amperes circuital law. Specify the conditions to be met for determining magnetic

field strength H, based on Amperes circuital law. (6M+9M)

3. a) Derive Maxwells equations in integral form and differential form for time varying fields.b) Explain how the concept of displacement current was introduced by Maxwell to account for

the production of magnetic field in the empty space. (7M+8M)

4. a) For a conducting medium derive expressions for and .b) Determine the phase velocity of propagation, attenuation constant, phase constant and

intrinsic impedance for a forward travelling wave in a large block of copper at 1 MHz

( = 5.8 x 107, r =1, r =1). Determine the distance that the wave must travel to be attenuated

by a factor of 100 (40db). (7M+8M)

5. Prove that under the condition of no reflection at an interface, the sum of the Brewster angleand the angle of refraction is 90 degrees for parallel polarization for the case of reflection by a

perfect conductor under oblique incidence, with neat sketches. (15M)

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6. a) Explain about attenuation in parallel-plate wave guides. Also draw attenuation versusfrequency characteristics of wave guided between parallel conducting plates.

b) Explain the significance of TEM wave in a parallel plane guide, and derive an expression for

the attenuation factor for TEM waves. (7M+8M)

7. a) Define characteristic impedance and propagation constants of transmission line and obtainlossless conditions.

b) A distortion less line of 80 has = 50 KHz to a load of 140. The load power is 75mW.

Calculate

i) Voltage reflection coefficient

ii) VSWR

iii) Position of VMax, Imin,Vmin and Imin (7M+8M)

8. a) Define the reflection coefficient and derive the expression for i/p impedance in terms ofreflection coefficient.

b) Explain how the i/p impedance varies with the frequency with sketches. (7M+8M)

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1. a) State Coulombs law of force between any two point charges, and indicate the units of thequantities in the force equation.

b) A point charge Q1 =10C is located at P(1,2,3) in free space, while Q2=5C is at P2(1,2,10).

i) Find the vector force exerted on Q2 by Q1.

ii) Find the coordinates of P3 at which a point charge Q3 experience no force. (7M+8M)

2. a) Derive equation of continuity for static magnetic fields.b) Derive an expression for magnetic field strength H, due to a current carrying conductor of

finite length placed on Y-axis at point P in the X-Z plane and r distance from the origin.

Hence deduce the expression for H due to semi-finite length of the conductor. (6M+9M)

3. a) What is the continuity equation? Derive it from the basics and describe all its forms.b) In a material for which = 5.0(m)

-1 and r = 1, the electric field intensity is E= 250 sin

1010

t V/m. Find the conduction and displacement current densities and the frequency at which

they have equal magnitudes. (7M+8M)

4. a) Derive wave equation for a conducting medium.b) A plane wave is propagating in a medium having the properties msr

r/1,36,4 ===

the E =100e-az

cos(109t-z) ax V/m, determine associated magnetic field. (7M+8M)

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5. a) Show that in a good conductor, the skin depth is always much shorter than the wavelength.

b) An EM wave travelling in air is incident normally on a boundary between air and a dielectric

having permeability same as free space and permittivity as 4. Prove that one-ninth of the

incident power is reflected and eight-ninths of it is transmitted into the second medium.

(7M+8M)

6. a) Explain and sketch the nature of variations of attenuation with frequency in a parallel platewave guide for TE, TM and TEM waves.

b) When a wave of 6GHz is to be propagated between two parallel conducting plates separated

by 60mm, find the modes that will propagate through the guide. (7M+8M)

7. a) What are the different types of losses in transmission lines?b) A co-axial cable has following parameters Z0 =50 ohms, L= 20KM if the power input is 1

watt and the attenuation constant is 1.5dB/km. Find the output power of the cable provided it is

terminated by Z0. Also determine the output current. (7M+8M)

8. a) Explain clearly why the short circuited stub are preferred over to open circuited stubs?b) Derive the expression for the input impedance of a loss-less line. Hence evaluate ZOC and

ZOC and sketch their variation with line length. (6M+9M)

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11/98

Code No: R22034


PRODUCTION TECHNOLOGY

(Mechanical Engineering)



~~~~~~~~~~--~~~~~~~~~~

1. a) What are the advantages of casting process over other shaping processes?b) Give an account of different pattern materials?

2. a) Describe the solidification of a pure metal with a neat sketch.b) Large castings are not made by investment casting. Comment.

3. What are the various types of welding joints? How are they classified? Explain all of themwith neat sketches.

4. a) What are some of the commonly used shielding gases in gas tungsten arc process? Explaintheir characteristics.

b) What are the primary process variables of gas metal arc welding? Explain their influence on

weld quality.

5. a) Explain recrystallization and grain growth processes and their effect on properties of a metalworked component.

b) Explain the selection of optimum hot working temperature.

6. a) Compare hot spinning and cold spinning.b) Sketch and explain wire drawing process.

7. a) Why are heated dies generally employed in hot press forging?b) What is the primary shape limitation of the extrusion process?

8. a) What is pultrusion? Explain.b) Describe the advantages of applying traditional metal forming techniques to forming

plastics?

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Code No: R22034






~~~~~~~~~~~~~~~~~~~~~~

1. a) What are composite moulds? Why are they used? Where are they used?b) What are different types of gates?

2. a) Differentiate between directional and unidirectional solidification.b) Compare cold chamber and hot chamber method of die casting.

3. a) Explain the process of Thermit welding and discuss its advantages?b) How do you classify the welding processes? Explain briefly.

4. What are the reasons for various defects observed in welding? List out the welding defects.Suggest remedies?

5. a) Compare cold working with hot working.b) Explain the effect of microstructure and strain rate on forming.

6. a) Distinguish between open frame and closed frame of presses.b) What are the various press tool components?

7. a) Derive the forces required in extrusion process.b) Classify and explain different forging tools.

8. a) With the help of a neat sketch explain injection moulding process.b) List out the properties and applications of plastics.

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Code No: R22034






~~~~~~~~~~~~~~~~~~~~~~

1. a) What are the primary requirements of a moulding sand? How is each provided by the sandand additive aggregate?

b) What is shrink rule, and how does it work?

2. a) Write the product applications of Semi-Centrifugal and Centrifugal casting methods.b) Write the advantages, limitations and product applications of investment casting methods.

3. a) Describe the appearance and properties of i)Neutral Flame ii) Reducing Flame iii) Oxidisingflame.

b) How does straight polarity differ from reverse polarity?

4. a) Describe with neat sketch the CO2 MIG welding process and give its specific applications.b) What is weldability? What factors influence it?

5. a) Explain the advantages of cold working. Name typical applications of cold working.b) Explain hot rolling operations through i) Two high reversing mill ii) Three high mill

iii) Four high mill.

6. a) Derive an equation for drawing force.b) How to control the parameters in tube drawing?

7. a) With the help of neat sketches explain the effect of semi cone angles on extruding force anddiscuss the mode of flow of material.

b) How direct extrusion differs from indirect extrusion? Discuss their relative merits and

demerits.

8. a) Explain the steps involved in injection moulding of plastics.b) What are different additive agents in plastics? Explain.

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Code No: R22034






~~~~~~~~~~~~~~~~~~~~~~

1. a) Give an account of relative advantages and disadvantages of different pattern materials.b) What are different pattern allowances? Explain.

2. a) What are some of the undesirable consequences that could result from turbulence of themetal in the gating system and mould cavity? Explain.

b) Differentiate and explain vertical and horizontal gating system?

3. a) Write the applications, advantages and limitation of gas welding.b) Write about spot welding electrodes.

4. a) Why do properties vary widely in most welding heat affected zones?b) With the help of a neat sketch explain the inert gas welding process.

5. a) Compare the properties of cold worked and hot worked parts.b) Distinguish between hot rolling and cold rolling.

c) How do you estimate the rolling load?

6. a) Identify the factors that influence the deep drawing force F and explain why they do?b) What is spring back and why is it a concern during bending?

7. a) Describe with a neat sketch, how seamless tubes can be produced by extrusion.b) What is roll forging? Explain in detail.

8. With the help of suitable figures explain the injection moulding process of plastics? What arethe advantages and applications?

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15/98

Code No: R22122


COMPUTER ORGANIZATION AND ARCHITECTURE

(Information Technology)



All Questions carry Equal Marks~~~~~~~~~--~~~~~~~~~~~

1. a) Draw and explain the structure of the IAS computer.b) What is PCI? Also explain the applications of PCI. (8M+7M)

2. What is an addressing mode? List and explain different addressing modes of 8086microprocessor. (15M)

3. a) What is a pipeline? What are its advantages? Explainb) List and explain the properties of RISC computers. (8M+7M)

4. a) What is a micro-operation? Explain the constituent elements of a program execution.b) Define and explain the functional requirements for the control unit. (8M+7M)

5. a) Draw and explain the LSI-11 microinstruction format.b) List and explain the applications of the microprogramming. (8M+7M)

6. a) What is a memory cell? Explain the read and write operations on a memory cell.b) Draw and explain the structure of a DRAM and SRAM cells. (8M+7M)

7. Discuss three different possible techniques for I/O operations. Also mention their merits anddemerits. (15M)

8. a) What is parallel processing? Explain the types of parallel processor systems.b) What is cache coherence? Explain. (8M+7M)

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16/98

Code No: R22122






All Questions carry Equal Marks~~~~~~~~~~~~~~~~~~~~~~

1. a) Draw and explain the basic block diagram of a digital computer.b) Explain the evolution of the Intel x86 architecture. (8M+7M)

2. a) Describe different instructions formats.b) What is a register? List and explain main registers of a computer. (8M+7M)

3. What is RISC? What are CISC? Explain their characteristics, merits and demerits. (15M)

4. a) What is an instruction cycle? Explain the flowchart for the instruction cycle.b) List and explain the salient features of Intel 8085. (9M+6M)

5. What is microinstruction sequencing? List and explain different sequencing techniques. (15M)

6. a) What is DRAM? What is an SRAM? Explain its merits and demerits.b) What is a ROM? Explain the types of ROM. (8M+7M)

7. What is Direct Memory Access (DMA)? What is the need for DMA? Explain the working ofDMA. Also mention its advantages. (15M)

8. a) Explain the Flynns classification of computer systems.b) Explain the concept of multi-core computers. (8M+7M)

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Code No: R22122







1. a) Draw and explain the expanded structure of IAS computer. (8M+7M)b) What is an instruction cycle? Explain how the instruction cycle is performed in computers?

2. What is an addressing mode? Explain different basic addressing modes. (15M)

3. a) Differentiate between RISC and CISC.b) Explain the architecture of RISC computers. (8M+7M)

4. Draw and explain the block diagram of Intel 8085. (15M)

5. a) Explain the classification of microinstructions.b) Explain the encoding of the microinstruction. (8M+7M)

6. a) What is A ROM? Explain different types of ROM.b) What is a cache memory? What is its need? Explain (8M+7M)

7. Explain the followinga) Input-Output Processor

b) Direct Memory Access

c) Interconnected (PCI) bus (5M+5M+5M)

8. a) Explain the organization of symmetric multiprocessors.b) What is cache coherence? Explain. (8M+7M)

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Code No: R22122







1. a) Draw the basic block diagram of a computer? Also list and explain different components ofa computer. (8M+7M)

b) With a neat flowchart, explain the Booths algorithm for twos complement multiplication.

2. a) Draw and explain different instruction formats.b) Explain the register organization of Intel computers. (8M+7M)

3. a) What is a pipeline? Explain pipelining hazards.b) List the main features of RISC computers. (8M+7M)

4. a) Write an assembly language program in 8085 to find the sum of an array of 8-bit numbers.b) Differentiate between hardwired control and micro-programmed control. (8M+7M)

5. a) Draw and explain the formats for horizontal and vertical microinstruction. (8M+7M)b) What is microinstruction sequencing? Explain two address field sequencing technique.

6. What is a magnetic disc? Explain how read and write operations are performed on magneticdiscs. Also explain physical characteristics of disc systems. (15M)

7. a) Differentiate between programmed I/O and interrupt driven I/O.b) What is DMA? Explain the operation of DMA. (8M+7M)

8. What is an array processor? Explain different approaches to vector computation. (15M)

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19/98

Code No: R22054


COMPUTER ORGANIZATION

(Com. to CSE, ECC)


Answer anyFIVE

QuestionsAll Questions carry Equal Marks

~~~~~~~~~~~--~~~~~~~~~~~

1. a) A memory unit has a capacity of 65536 words of 25 bits each. The instruction is divided intofour parts: an indirect mode bit, an opcode, two bits that specify a processor register and an

address part. Find the number of bits in MDR, MAR, PC, and opcode, respectively.

b) Registers R1 and R2 of a computer contain the decimal values 12000 and 6000 respectively.

What is the effective address of the memory operand in each of the following instructions?

i) MOV 20 (R1), R5 ii) STORE R5, 30 (R1, R2)

iii) LOAD #3000, R5 iv) ADD - (R2), R5 (8M+7M)

2. a) If each address space represents one byte of storage space, then how many address lines areneeded to access RAM chips arranged in a 4 X 6 array, where each chip is 8K X 4 bits?

b) Explain the different types of memory chips. (10M+5M)

3. a) What is a micro-operation? Explain the four different types of micro-operations.b) A logic network has two data inputs A and B, and two control inputs C

0and C

1. It

implements the function, F according to the following table. Design a circuit using one 4 X 1

Multiplexer, one 2-input Exclusive-OR gate, one 2-input AND gate, one 2-input OR gate and

one Inverter. (7M+8M)

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4. a) A microinstruction has 6 control fields, each one triggering the following number of controlsignals. What is the fewest number of control bits required to describe all the control fields?

b) Show the logic needed to generate the control signals for registers PC, DR, TR and IR of the

relatively simple CPU. (8M+7M)

5. a) Consider the expression: (11A1B)8 = (12C9)16. Find the values of A and B in decimalsystem.

b) In a 16 bit computer using 2s complement representation, an integer variable has value:

215 1. If 2 is added to the value 215 1, then what is the final result?

c) Consider the values: A = 2.0 X 1030

, B = -2.0 X 1030

, C = 1.0, and the sequence:

X = A + B; Y = A + C; X = X + C; Y = Y + B; executed on a computer where floating

point numbers are represented with 32 bits. Find the values of X and Y?

d) What is a normalized floating point number? Give an example. (3M+3M+4M+4M)

6. a) What is content addressable memory? Explain the internal organization of contentaddressable memory with a suitable diagram.

b) A computer system has a main memory and the cache memory, consisting of 1M 16-bit

words and 4K words respectively. The cache memory is organized in the block set associative

manner with 4- blocks per set and 64 words per block.i) How many bits are needed to represent each of the TAG, SET and WORD field?

ii) How many bits are required for addressing the main memory? (7M+8M)

7. a) Compare device polling and daisy chaining.b) What is an UART? Explain the internal configuration of UART.

c) What is an I/O processor? Explain with a neat diagram. (5M+5M+5M)

8. a) What are the salient features of RISC processors? Explain in detail.b) Design an 8 X 8 Omega network and derive the hardware complexity of it. (7M+8M)

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Code No: R22054



(Com. to CSE, ECC)


Answer anyFIVE


~~~~~~~~~~~~~~~~~~~~~~~~

1. a) Write a program for the relatively simple CPU to calculate the sum of n values, =

n

i

i1

and

show the execution trace of the program for n = 5.

b) Registers X, Y and Z contain the values 1000, 2000 and 1000 respectively. Memory

locations 1000 and 2000 contain the values 2000 and 3000 respectively. For the following

instructions, each executed from the preceding initial state, what is the effect of executing

each instruction?

i) ADD X, (Y) ii) ADD (Z, X), Xiii) SUB (Z, X), X iv) ADD #6000, (Y) (7M+8M)

2. a) What is the difference between SRAM and DRAM? Explain.b) Design a 16 X 2 memory subsystem with high-order interleaving using 8 X 2 memory chips

for a computer system with an 8-bit address bus. (5M+10M)

3. a) What is a shift micro-operation? Explain the different types of shift micro-operations.b) A logic network has two data inputs A and B, and two control inputs C0 and C1. It

implements the function, F according to the following table. Design a circuit using one 4 X 1

Multiplexer, one 2-input Exclusive-OR gate, one 2-input AND gate, one 2-input OR gate andone Inverter. (7M+8M)

4. a) What is microprogramming? Compare hard-wired control and micro-programmed control.b) Show the logic needed to generate the control signals for the ALU of the relatively simple

CPU. (8M+7M)

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Code No: R22054

5. a) Find the base, b of the expression: ( )b13(224)b = b) What is the Booths coding in 8 bits for the decimal number: -57?

c) The following binary floating point number is in the un-normalized form, and it consists of a

sign bit, a fractional mantissa, an excess 64, radix 16 exponents. Find the normalized

representation and its value in decimal system.

1 1 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 1

Sign bit Exponent Fractional Mantissa

(3M+3M+ 9M)

6. a) Compare cache memory and virtual memory.b) What is meant by locality of reference? Explain.

c) In a two-level virtual memory, the access time for main memory is sec01.0 . And the access

time for the secondary memory is sec01.0 m . What must be the hit ratio such that the access

efficiency is within 80% of its maximum possible value? (4M+4M+7M)

7. a) Explain the concept of handshaking technique.b) What is an interrupt? Explain the three types of interrupts.

c) What is DMA? Explain the three types of DMA transfer modes. (5M+5M+5M)

8. a) What is an instruction pipeline? Explain, in detail, the two types of instruction pipelineconflicts with suitable examples.

b) Design an 8 X 8 Benes network and derive the hardware complexity of it. (7M+8M)

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R10 SET - 2


23/98

Code No: R22054



(Com. to CSE, ECC)


Answer anyFIVE


~~~~~~~~~~~~~~~~~~~~~~~~

1. a) What are the status flags in 8085 microprocessor? Explain them with suitable examples.b) What is a Write a program for the relatively simple CPU that can evaluate the arithmetic

expression X = (A - B) / (C + D * E) by a three address, two address, one address and zero

address instructions. Assume that the processor has the following instructions: LOAD, STORE,

DIV, MUL, ADD, SUB, MOV, PUSH, POP (5M+10M)

2. a) A ROM is used to store the truth table for multiplication of two 8-bit unsigned integers. Ifthe size of the ROM that is required to accommodate the truth table is X words * Y bits, then

what would be the values of X and Y?b) Assume that a CPU has only two registers R1 and R2 and only the following instruction is

available: 2,1,;, = jiforRRRRRXOR jijji

Using the above instruction, find an instruction sequence in order to exchange the contents of

the registers R1 and R2. (7M+8M)

3. a) What is a logic micro-operation? Explain the different types of logic micro-operations.b) The 8-bit registers AR, BR, CR and DR initially have the values: 11110010, 11111111,

10111001 and 11101010 respectively. Determine the 8-bit values in each register after the

execution of the following sequence of micro-operations:

c) Draw the state diagram for modulo 6 counter. (5M+5M+5M)

4. a) Obtain the contents of register A after the execution of the following ALP of 8085microprocessor:

b) A certain processor has a microinstruction format containing 10 separate control fields: C0,

C1, C2, C3, C4, C5, C6, C7,C8,C9. Each Ci can activate any one of ni distinct control lines, where

ni is specified as follows:

What is the minimum number of control bits needed to represent the 10 control fields?

(5M+10M)

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Code No: R22054

5. a) What is the 2s complement of the number: -5/8?b) Perform the 2s complement multiplication for the signed integer operands: (-13) * (-10)

using Booths recoding scheme.

c) A digital computer uses a floating point representation comprising a signed magnitude

fractional mantissa and an excess-16, radix-8 exponent. What decimal number is represented

by a floating point number whose exponent is 10011 and mantissa is 101000 and the sign bit

set? (3M+6M+6M)

6. a) What is the difference between logical address and physical address? Give an example.b) Consider a logical address space of 8 pages of 1024 words mapped onto a physical memory

of 32 frames. i) How many bits are there in the logical address? ii) How many bits are there in

the physical address?

c) A two-level memory, M1 and M2, the access times: .sec10 81

=At and sec10 32

=At .What

must be the hit ratio, H, be in order for the for the access efficiency to be at least 65% of its

maximum possible value? (4M+4M+7M)

7. a) Compare memory mapped I/O and I/O mapped I/O.b) How many characters per second can be transmitted over an asynchronous serial

transmission line (i.e. START-STOP bit scheme) at 2400 bits per second with 2 STOP bits?

Each character code consists of 8-bits.

c) What is a daisy chaining? Explain with a neat diagram. (5M+5M+5M)

8. a) What is an interleaving? Explain the high-order and low-order interleaving with an example.b) A RISC instruction pipeline has four stages with propagation delays of 30ns, 25ns, 60ns and

40ns, respectively.

i) What are the clock period and steady-state speedup of the pipeline?

ii) If a non-pipelined CPU can process an instruction in 150ns, what is the actual steady-

state speedup of the pipeline? (7M+8M)

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R10 SET - 3


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Code No: R22054



(Com. to CSE, ECC)


Answer anyFIVE


~~~~~~~~~~~~~~~~~~~~~~~~

1. a) A computer has 48 bit instructions and 12 bit addresses. If there are S three addressinstructions, D two address instructions and V address instructions, then how many zero

address instructions can be formulated?

b) Write a program for the relatively simple CPU that can evaluate the arithmetic expression

X = (A + B) * (C + D) by a three address, two address, one address and zero address

instructions. Assume that the processor has the instructions: LOAD, STORE, MUL, ADD,

MOV, PUSH, POP (7M+8M)

2. a) What is an instruction cycle? Explain fetch and execute operations.b) Design a 16 X 4 memory subsystem with high-order interleaving using 8 X 2 memory chips

for a computer system with an 8-bit address bus. (5M+10M)

3. a) What is a hardware description language? Explain the features of VHDL.b) Design a modulo 6 counter for implementation of the RTL code. (5M+10M)

4. a) What is microinstruction? Compare horizontal and vertical microinstructions.b) What are the two methods to reduce the number of microinstructions needed by the control

unit? Explain, in detail, with suitable examples. (7M+8M)

5. a) How many 1s are present in the unsigned binary representation of the value of the decimalexpressions: 32768 X 4 + 1024 X 8 + 32 X 16 + 32?

b) What is the Booths coding in 10 bits for the decimal number: -100?




set? (5M+5M+5M)

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Code No: R22054

6. a) What is a page? When do page faults occur? The address sequence generated by tracing aparticular program executing in a pure demand paging system, with 100 records per page and

one free main memory frame is recorded as follows: 0100, 0210, 0430, 0499, 0510, 0530,0560, 0120, 0220, 0240, 0260, 0320, 0370, and 0360. What is the total number of pages which

will not occur page faults?

b) What is a segment? What is a paged segmentation? Consider the following segment table

with segment number, segment length and segment base address:

What are the physical addresses for the following logical addresses?

i) 0, 430 ii) 1, 14 iii) 4, 112 iv) 1, 13 v) 3, 400 vi) 2, 500 (8M+7M)

7. a) Compare device polling and daisy chaining.b) What is an UART? Explain the internal configuration of UART.

c) How many characters per second can be transmitted over an asynchronous serial

transmission line (i.e. START-STOP bit scheme) at 2400 bits per second with 2 STOP bits?

Each character code consists of 8-bits. (5M+5M+5M)

8. a) Compare RISC and CISC processors.b) Explain the Flynns classification of multiprocessor systems.

c) What is a massively parallel processor? Give an example. (5M+5M+5M)

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Code No: R22014


HYDRAULICS AND HYDRAULIC MACHINERY(Civil Engineering)



All Questions carry Equal Marks~~~~~~~~~~--~~~~~~~~~~

1. a) What do you understand by i) steady and unsteady flow, ii) uniform and non-uniform flowin the case of channels?

b) An irrigation channel of trapezoidal section, having side slope s 3 horizontal to 2 vertical, is

to carry a flow of 10 cumec on a longitudinal slope of 1 in 5000. The channel is to be lined for

which the value of friction coefficient in Mannings formula is n = 0.012. Find the dimensions

of the most economic section of the channel. (6M+9M)

2. a) A horizontal rectangular channel 4 m wide carries a discharge of 16 m3/s. Determinewhether a jump may occur at an initial depth of 0.5 m or not. If a jump occurs, determine thesequent depth to this initial depth. Also determine the energy loss in the jump.

b) Explain the term hydraulic jump. Derive an expression for the downstream depth of

hydraulic jump. (7M+8M)

3. a) Define the term dimensional analysis and model analysis.b) In 1:40 model of a spillway, the velocity and discharge are 2 m/s and 2.5 m

3/s. Find the

corresponding velocity and discharge in the prototype. (7M+8M)

4. a) A jet of water of 10 cm diameter is discharging under a constant head of 80 m. Find theforce exerted by the jet on a fixed plate. Take coefficient of velocity as 0.9.b) Show that the force exerted by a jet of water on an inclined fixed plate in the direction of the

jet is given by Fx= aV2

Sin2 , where a= Area of the jet, V= velocity of the jet and

=inclination of the plate with the jet. (6M+9M)

5. a) Explain briefly the principles on which a Kaplan turbine works.b) Explain the different types of the efficiency of a turbine (8M+7M)

6. Explain i) Unit speed, ii) Unit discharge, iii) Unit power of a hydraulic turbine. Deriveexpressions for each of them. (15M)

7. What do you mean by manometric efficiency, mechanical efficiency and overall efficiency ofcentrifugal pump?

(15M)

8. a) Discuss in detail estimation of hydropower potential.b) Explain the terms i) load factor and ii) utilization factor (9M+6M)

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Code No: R22014





~~~~~~~~~~~~~~~~~~~~~~

1. a) Derive the condition for the best side slope of the most economical trapezoidal channel.b) Design a concrete lined channel to carry a discharge of 500 cumecs at a slope of 1 in 4000.

The side slopes of the channel may be taken as 1:1. The Mannings roughness coefficient for

the lining is 0.014. Assume permissible velocity in the section as 2.5 m/s. (8M+7M)

2. a) Show that in a rectangular open channel the critical depth is two thirds of specific energy.b) A trapezoidal channel having bottom width 8 m and side slope 1:1, carries a discharge of 86

m3

/sec. Find the depth conjugate to initial depth of 0.75 m before the jump. Also determine theenergy in the jump. (7M+8M)

3. a) State Buckinghams - theorem. Why this theorem is considered superior to Rayleighsmethod for dimensional analysis?

b) A dam 15 m long is to discharge water at the rate of 120 cumecs under a head of 3 m.

Design the model, if the supply available in the laboratory is 50 l/s. (8M+7M)

4. a) Define the terms: i) Impact of jets, and ii) Jet propulsion.b) Obtain an expression for the force exerted by a jet of water on a fixed vertical plate in the

direction of the jet. (6M+9M)

5. a) How will you classify the turbines?b) Differentiate between turbines and pumps. (8M+7M)

6. What do you understand by the characteristics curves of turbine? Name the importantcharacteristics of a turbine. (15M)

7. Define a centrifugal pump. Explain the working of a single stage centrifugal pump with neatsketches. (15M)

8. a) Compare and contrast between hydropower station and thermal power station.b) List out twelve important hydropower plants in India. (9M+6M)

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Code No: R22014






1. a) A trapezoidal channel has a bed width of 5 m, side slopes of 1 upon 1.5 and Mannings n =0.015. Compute the critical slope and the corresponding discharge for a critical depth of 2 m.

b) Derive the condition for depth of flow of a most economical circular channel section subject

to the condition for maximum velocity. (8M+7M)

2. a) A rectangular channel carries a discharge of 2 m3/sec per meter width. If the loss of energyin the hydraulic jump is found to be 2.75 m, determine the conjugate depths before and after

the jump.



3. a) What do you mean by dimensionless numbers? Name any three dimensionless numbersb) A 1:50 spillway model has a discharge of 1.5 cumecs. What is the corresponding prototype

discharge? If a flood phenomenon takes 6 h to occur in the prototype, how long should it take

in the model. (8M+7M)

4. a) Obtain an expression for the force exerted by a jet of water on a fixed vertical plate in thedirection of the jet

b) A jet of velocity of 20 m/s strikes a flat plate inclined at 30 with the axis of the jet. If the

cross sectional area of the jet is 20 cm2, find the force exerted by the jet on the plate. Also

calculate the components of the force in the direction normal to the jet. Find also the ratio in

which the discharge gets divided after striking the plate. (9M+6M)

5. a) A pelton wheel, working under a head of 400 m, produces 12000kW at 400 rpm. If theefficiency of the wheel is 80%, determine i) discharge of the turbine, ii) diameter of the wheel

and iii) diameter of the nozzle (assume suitable data)

b) With a neat sketch discuss layout of a typical hydropower installation. (7M+8M)

6. a) How does the load variation on generator have effect on turbine in hydropower installation?What is the role of a governor?

b) What are unit quantities? Define the unit quantities for turbine (8M+7M)

7. a) Discuss in general the main operating characteristics of a centrifugal pump. What is theimportance of constant efficiency curves?b) Define cavitation. What are the effects of cavitation? (8M+7M)

8. a) Discuss in detail estimation of hydropower potential.b) Explain the terms i) load factor and ii) utilization factor (9M+6M)

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Code No: R22014






1. a) A trapezoidal channel has a bottom width of 6 m and side slopes of 1:1. If the depth of flowis 1.5 m at a discharge of 20 m

3/sec, compute the specific energy and the critical depth.

b) Explain the terms specific energy of a flowing liquid, minimum specific energy, critical

depth, critical velocity and alternate depths as applied to non-uniform flow. (8M+7M)

2. State and discuss the assumption made in the derivation of the dynamic equation for graduallyvaried flow. Starting from first principles derive equations for the slope of the water surface in

gradually varied flow with respect to i) channel bed, ii) horizontal. (15M)

3. a) What do you mean by fundamental units and derived units? Give examples.b) An aeroplane model of scale ratio 1:30 is tested in water, which is 50 times more viscous

and 800 times more dense than the air. If the pressure drop in the model during test is 225.63

N/m2, find the corresponding pressure drop in the prototype. (7M+8M)

4. a) Derive an expression for the force, work done, and efficiency of a moving curved vane.b) A jet of water diameter 0.12 m moving with a velocity of 30 m/s strikes a curved fixed

symmetrical plate at the center. Find the force exerted by the jet of water in the direction of the

jet, if the jet is deflected through an angle of 120 at the outlet of the curved plate. (9M+6M)

5. a) A Pelton wheel turbine produces 20 MW while running at 700 rpm under an effective headof 1700 m. Calculate, i) least diameter of the jet, ii) mean diameter of the runner and

iii) Number of buckets

b) Explain the different types of the efficiency of a turbine (8M+7M)

6. a) What is cavitation? How can it be avoided in reaction turbine?b) What is the basis of selection of a turbine at a particular place? (7M+8M)

7. a) Explain condition in which two pumps may be operated in series or in parallel.b) What is multistage pump and what are its advantages (8M+7M)

8. a) What is mass curve? Explain the procedure for preparing a mass curve and also its uses.b) What area the essential stream flow data for water power studies. (8M+7M)

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Code No: R22022


POWER SYSTEM - I

(Electrical and Electronics Engineering)



All Questions carry Equal Marks

~~~~~~~~~~--~~~~~~~~~~

1. Give the layout of a modern thermal power plant and explain briefly.

2. a) What are the various types of radiation hazards? Explainb) Describe the fast breeder reactor with neat sketch? List out its merits.

3. a) Explain with the help a neat block diagram, the working principle of Gas Power generationb) Draw the flow diagram of solar energy storage

4. a) How does AC distribution differ from DC distribution?b) What is the importance of load power factor in AC distribution

c) A 2-wire, DC distributor 500 m long is loaded uniformly at the rate of 0.4A/m. If the voltage

drop in the distributor is not to exceed 5V, Calculate the area of cross section of each conductor

required when the distributor is fed at one end. Take resistivity of a conductor material as 1.7

10-8

-m.

5. a) Draw the layout of typical substation showing the location of all the substation equipment?Discuss them

b) Explain the installation and maintenance of gas insulated substation

6. a) Deduce an expression for insulation resistance of a single core cable in terms of specificresistance of dielectric, its core and sheath diameter

b) State the classification of cables according to voltage and discuss their general construction

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7. a) Define the followingi) Load factor

ii) Diversity factor

iii) Capacity factor

iv) Plant use factor

b) A Power station is to fed four regions of load whose peak loads are 12, 7, 10 and 8 MW. The

diversity factor at the station is 1.4 and the average annual load factor is 65%.

Determine the following

i) Maximum demand on the station

ii) Annual energy supplied by the station and

iii) Suggest the installed capacity

8. a) Explain the various types of costs of generationb) Compare the annual cost of supplying a factor load having a maximum demand of 1MW at a

load factor of 50% by energy obtained from i) Nuclear power plant and ii) Public supply

Nuclear Power Plant:Capital Cost = Rs. 50,000

Cost of Fuel = Rs. 600 per 1000 kg

Fuel consumption = 30 g per kwh generated

Maintenance Cost etc. = Rs. 0.005 per kwh generated

Wages = Rs. 20,000 per annum

Interest and Depreciation = 10%

Public Supply:

Rs. 50 per k + Rs. 0.03 per kh generated

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Code No: R22022


POWER SYSTEM - I





~~~~~~~~~~~~~~~~~~~~~~

1. a) What are the essential requirements of steam power station designb) Explain the function of super heater and economical in thermal power plant

2. a) Explain with help of neat diagram the construction and working of a nuclear power plantb) Describe with the help of a neat sketch the construction working of a pressurized waterreactor

3. Describe with the help a neat sketch, the working of a solar power plant. What are its salientfeatures

4. a) Give the comparison between radial distribution and ring main distributionb) A 2-wire, DC distributor 500 m long has a uniformly distributed load of 1A/m. There are

concentrated loads of 200A, 150A, 50A, and 100A at 100 m, 200 m, 300 m, and 400 m

respectively from one end. The distribution resistance is 0.1/Km (go and return) if the

distributor is fed at both ends at 220 V determine

i) The value of minimum potential

ii) The Position of minimum potential on the distributor

5. a) Make a list of the main equipments in a substation? Explainb) State the advantages of gas insulated substation over air insulated substation

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Code No: R22022

6. a) Draw the cross section of an insulated cable and explain the significance of the variouslayers

b) The capacitance of a 3- cable are 6.3 F between the three cores bunched together and

earthed sheath and 3.7 F between one core and the other two connected to earth. Determine

the charging current drawn by the cable when connected a 3- , 132kV, 50Hz, supply

7. a) What are the various methods of tariff? Explain power factor tariff.b) A consumer has a connected load of 12 lamps each of 100W at his/her premises. His/her

load demand as follows:

From Mid night 5 A.M ; 200W

5 A.M to 6 P.M; No Load

6 P.M to 7 P. M; 700W

7 P.M to 9 P. M; 1,000W

9 P.M to Mid night; 500W

Draw the load curve and calculate the

i) Energy consumption during 24 Hours,

ii) Demand factor

iii) Average load

iv) Maximum demand and

v) Load factor

8. a) Explain the factor to be considered in fixed up the tariffb) A customer takes a consumer load of 200 kW at a p. f of 0.85 lag for 12 hours/day and 365

days/annum. Calculate the annual payment under each of the following tariffs

i) Rs. 1.3/ kWh + Rs. 1000/kVA/annum

ii) Rs. 1.25/kWh +Rs. 1000/kW/annum+30paise/kVArh

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Code No: R22022


POWER SYSTEM - I





~~~~~~~~~~~~~~~~~~~~~~

1. a) Describing briefly the various methods of steam turbine governingb) Explain the function of super heater with neat diagram

2. a) Enumerate and explain essential components of a nuclear reactorb) What is boiling water reactor? How does it different from pressurized water reactor

3. What are the various types of solar energy collectors? Explain in details with neat sketches.

4. a) Explain the design features of distribution systemsb) A 2 wire, DC ring distributor is 300m long and is fed at 240V at point A. At point B, 150m

from A, is loaded of 120A is taken and at C, 100m in the opposite direction, a load of 80A, is

taken. If the resistance per 100m of single conductor is 0.03, find the currents in each section

of distributor and voltages at points B and C.

5. a) What are the various types of bus bar arrangements in the substion? discuss main andtransfer bus bar system

b) Explain the construction aspect of gas insulated substation

6. a) Draw the cross section of a 3-core belted high voltage cable and describe its various partsb) Find the expression for electrostatic stress in a single core cable. Where does maximum

stress occur and where is it minimum and why?

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Code No: R22022

7. a) Explain briefly the followingi) Load curve

ii) Load duration curve give significances

b) A power station has a maximum demand of 15MW, a load factor of 0.7, a plant capacity

factor of 0. 525 and a plant use factor of 0.85. Find the following

i) The daily energy produced

ii) The reserve capacity of the plant

iii) The maximum energy that could be produced daily if the plant operating schedule is

fully loaded when in operation

8. a) What are the factor influencing the formulation of tariffb) The data of a power station as follows

Installed capacity = 200MW, Capital Cost = Rs. 350 106, rate of interest and depreciation =

20%, annual cost of fuel oil, salaries and taxation = Rs. 40 106

and load factor = 0.5.

Determine the cost of generation and the cost of saving per kWh, if the annual load factor is

raised to 0.6. Comment on the results

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Code No: R22022


POWER SYSTEM - I





~~~~~~~~~~~~~~~~~~~~~~

1. Describe briefly the various components in modern thermal power station with neat flowdiagram.

2. a) What do you mean by Binding Energy? What are the total binding energy and bindingenergy per nucleon for the

12

6C

nucleus?

b) Describe with the help of a neat sketch, the construction working of a boiling water reactor.

What are its merits and demerits?

3. a) Draw the single line diagram of solar power generation plant? Explain operating principle?b) Briefly discuss the various components of gas power plant

4. a) State the main types of distribution systems and compare their applicationsb) A single phase, ring distributor PQR is fed at P. The loads at Q and R are 50A at p.f. 0.8 lag

and 80A at p.f. 0.707 lag respectively, both expressed relative to the voltage at P. The total

impedance of the three sections PQ, QR and RP are (1.5 + j 1.5) , (2+j3) and (2+j1)

respectively. Determine the current in each section with respect to the voltage at P.

5. a) State the advantages of outdoor substations over indoor substationsb) Explain the different types of gas insulated substations

6. a) Describe the reasons for grading of cablesb) A single core, 33kV cable has a conductor diameter of 2 cm and a sheath of inside diameter

5.3cm. The cable has an inner layer of 1cm thick of rubber of dielectric constant 4.5 and rest

impregnated refer of dielectric constant 3.6. Find the maximum stresses in the rubber and in the

paper

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Code No: R22022

7. a) Draw the integrated load duration curve? Explain its significanceb) The yearly duration curve of a certain plant can be considered as a straight line from

150MW to 40MW. Power is supplied with one generating unit of 100MW capacity and two

units of 50MW capacity each. Determine

i) installed capacity

ii) load factor

iii) plant factor

iv) utilization factor

8. a) What are the objectives and requirements of tariffb) The following data related to a power plant of 120MW capacity

Capital cost = Rs. 1500/k , interest and depreciation = 10% on capital, annual running

charges = Rs. 20 106, profit to be gained = 10% of the capital, the energy consumed by the

power plant auxiliaries = 5% of generated, the annual load factor = 0.6, annual capacity factor

= 0.5. Calculate the following

i) The reserve capacity

ii) The cost of generation per kwh

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Code No: V0522

II B.Tech II Semester, Supplementary Examinations, April 2012


(Com. to CSE, IT ECC)

Time: 3 hours Max. Marks: 80Answer any FIVE Questions


*********

1. a) Determine the single error correcting code for the message code: 10110 for an odd paritysystem.

b) How many 1s are present in the unsigned binary representation of the value of the

decimal expressions: 32768 X 4 + 1024 X 8 + 32 X 16 + 32?

c) If (1.001)1259

= 3.52 and (1.001)2062

= 7.85, then what is the value of: (1.001)3321

?

(6M+5M+5M)

2. a) A computer has 48 bit instructions and 12 bit addresses. If there are S three addressinstructions, D two address instructions and V address instructions, then how many zero

address instructions can be formulated?

b) Write a program for the relatively simple CPU that can evaluate the arithmetic expression

X = (A + B) * (C + D) by a three address, two address, one address and zero address

instructions. Assume that the processor has the instructions: LOAD, STORE, MUL, ADD,

MOV, PUSH, POP (8M+8M)

3. a) What is a microinstruction? Compare horizontal and vertical microinstructions.b) What are the two methods to reduce the number of microinstructions needed by the

control unit? Explain, in detail, with suitable examples. (8M+8M)

4. a) Explain the Booths algorithm for signed number multiplication.b) What is the Booths coding in 10 bits for the decimal number: -100?c) A digital computer uses a floating point representation comprising a signed magnitude



set? (5M+5M+6M)

5. a) What is a page? When do page faults occur? The address sequence generated by tracing aparticular program executing in a pure demand paging system, with 100 records per page

and one free main memory frame is recorded as follows: 0100, 0210, 0430, 0499,

0510, 0530, 0560, 0120, 0220, 0240, 0260, 0320, 0370, and 0360. What is the total

number of pages which will notoccur page faults?

b) What is a segment? What is a paged segmentation? Consider the following segment table

with segment number, segment length and segment base address:

What are the physical addresses for the following logical addresses? (8M+8M)

i) 0, 430 ii) 1, 14 iii) 4, 112 iv) 1, 13 v) 3, 400 vi) 2, 500

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Code No: V0522

6. a) Compare device polling and daisy chaining.b) What are the salient features of RS-232? Explain.

c) How many characters per second can be transmitted over an asynchronous serial

transmission line (i.e. START-STOP bit scheme) at 2400 bits per second with 2 STOP bits?Each character code consists of 8-bits. (5M+5M+6M)

7. a) Explain the Flynns classification of multiprocessor systems.b) Compare RISC and CISC processors.

c) What is an arithmetic pipeline? Explain the arithmetic pipeline for floating point addition

and subtraction with a neat diagram. (5M+5M+6M)

8. a) Compare tightly coupled and loosely coupled multiprocessor systems.b) What is a multi-port memory? Explain the multi-port memory organization with a neat

diagram.

c) Design an 8 X 8 Omega network and derive the hardware complexity of it. (5M+5M+6M)

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Code No: V0522






*********

1. a) Determine the single error correcting code for the message code: 1001 using evenparity system.

b) What is the 2s complement of the number: -5/8?

c) Find the value V of the expression: (789)16 + (473)8 = (V)4 (6M+5M+5M)

2. a) What is a logic micro-operation? Explain the different types of logic micro-operations.b) Assume that a CPU has only two registers R1 and R2 and only the following instructionis available:

2,1,;, = jiforRRRRRXOR jijji

Using the above instruction, find an instruction sequence in order to exchange the

contents of the registers R1 and R2.

c) What is a Write a program for the relatively simple CPU that can evaluate the

arithmetic expression X = (A - B) / (C + D * E) by a three address, two address, one

address and zero address instructions. Assume that the processor has the following

instructions:

LOAD, STORE, DIV, MUL, ADD, SUB, MOV, PUSH, POP (5M+5M+6M)

3. a) What is meant by microprogramming? Compare hard-wired control and micro-programmed control.b) A certain processor has a microinstruction format containing 10 separate control fields:

C0, C1, C2, C3, C4, C5, C6, C7, C8, C9. Each Ci can activate any one of ni distinct

control lines, where ni is specified as follows:

What is the minimum number of control bits needed to represent the 10 control fields?

(8M+8M)

4. a) What is a normalized floating point number? Give an example.b) Perform the 2s complement multiplication for the signed integer operands:

(-13) * (-10) using Booths recoding scheme.c) A digital computer uses a floating point representation comprising a signed magnitude

fractional mantissa and an excess-16, radix-8 exponent. What decimal number is

represented by a floating point number whose exponent is 10011 and mantissa is 101000

and the sign bit set? (5M+5M+6M)

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5. a) What is the difference between logical address and physical address? Give an example.b) Consider a logical address space of 8 pages of 1024 words mapped onto a physical

memory of 32 frames. i) How many bits are there in the logical address?

ii) How many bits are there in the physical address?c) A two-level memory,M1 and M2,the access times: .sec10

8

1

=At and .sec10

3

2

=At

What must be the hit ratio, H, be in order for the for the access efficiency to be at least

65% of its maximum possible value? (4M+4M+8M)

6. a) Compare memory mapped I/O and I/O mapped I/O.b) How many characters per second can be transmitted over an asynchronous serial

transmission line (i.e. START-STOP bit scheme) at 2400 bits per second with 2 STOP

bits? Each character code consists of 8-bits.

c) What is a daisy chaining? Explain with a neat diagram. (5M+6M+5M)

7. a) Compare arithmetic pipeline and instruction pipeline.b) A RISC instruction pipeline has four stages with propagation delays of 30ns, 25ns,

60ns and 40ns, respectively.

i) What are the clock period and steady-state speedup of the pipeline?

ii) If a non-pipelined CPU can process an instruction in 150ns, what is the actual steady-

state speedup of the pipeline? (6M+10M)

8. a) What is a system bus? Compare synchronous bus and asynchronous bus.b) What is a cache coherence problem? What are the solutions to the cache coherence

problems?

c) Compare tightly coupled and loosely coupled multiprocessor systems. (5M+5M+6M)

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1. a) The following an 11-bit code word is received. Where, if any, has a bit been reversedduring transmission according to a Hamming error correcting code scheme? Assume that the

system has an even parity.

b) Find the base, b of the expression: ( )b13(224)b=

c) In a 16 bit computer using 2s complement representation, an integer variable has value:

215

1. If 2 is added to the value 215

1, then what is the final result? (6M+5M+5M)

2. a) What is a shift micro-operation? Explain the different types of shift micro-operations.b) A logic network has two data inputs A and B, and two control inputs C0 and C1. It

implements the function, F according to the following table. Design a circuit using one 4

X 1 Multiplexer, one 2-input Exclusive-OR gate, one 2-input AND gate, one 2-input OR

gate and one Inverter.

c) Registers X, Y and Z contain the values 1000, 2000 and 1000 respectively. Memory

locations 1000 and 2000 contain the values 2000 and 3000 respectively. For the following

instructions, each executed from the preceding initial state, what is the effect of executing

each instruction?

i) ADD X, (Y) ii) ADD (Z, X), X

iii) SUB (Z, X), X iv) ADD #6000, (Y) (6M+5M +5M)

3. a) What are the two methods to reduce the number of microinstructions needed by thecontrol unit? Explain, in detail, with suitable examples.

b) A microinstruction has 6 control fields, each one triggering the following number ofcontrol signals. What is the fewest number of control bits required to describe all the control

fields? (8M+8M)

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4. a) Explain the Booths algorithm for signed number multiplication.b) What is the Booths coding in 8 bits for the decimal number: -57?

c) The following binary floating point number is in the un-normalized form, and it consists

of a sign bit, a fractional mantissa, an excess 64, radix 16 exponents. Find the normalized

representation and its value in decimal system. (5M+5M+6M)

1 1 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 1

Sign bit Exponent Fractional Mantissa

5. a) Compare cache memory and virtual memory.b) What is meant by locality of reference? Explain.

c) In a two-level virtual memory, the access time for main memory is sec01.0 . and the

access time for the secondary memory is sec01.0 m . What must be the hit ratio such thatthe access efficiency is within 80% of its maximum possible value? (4M+4M+8M)

6. a) Explain the concept of handshaking technique.b) What is an interrupt? Explain the three types of interrupts.

c) What is DMA? Explain the three types of DMA transfer modes. (5M+5M +6M)

7. a) What is an instruction pipeline? Explain, in detail, the two types of instruction pipelineconflicts with suitable examples.

b) What is a vector processing? What are the applications of the vector processing? Explain

in detail. (8M+8M+8M)

8. a) Explain the different types of interconnection structures.b) Design a hypercube interconnection structure for n = 7.

c) What is a cache coherence problem? What are the solutions to the cache coherence

problems? (5M+5M+6M)

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1. a) Following 7-bit single error correcting Hamming coded message is received:

Determine, if the message is correct (assuming that at most 1-bit could be corrupted). If

the message contains an error, find the bit which is erroneous and give the correctmessage.

b) Consider the expression: (11A1B)8 = (12C9)16. Find the values of A and B in decimal

system.

c) Consider the values: A = 2.0 X 1030

, B = -2.0 X 1030

, C = 1.0, and the sequence:

X = A + B; Y = A + C; X = X + C; Y = Y + B; executed on a computer where floating

point numbers are represented with 32 bits. Find the values of X and Y? (6M+5M+5M)

2. a) A memory unit has a capacity of 65536 words of 25 bits each. The instruction isdivided into four parts: an indirect mode bit, an opcode, two bits that specify a processor

register and an address part. Find the number of bits in MDR, MAR, PC, and opcode,

respectively.

b) A logic network has two data inputs A and B, and two control inputs C 0 and C1. It

implements the function, F according to the following table. Design a circuit using one 4

X 1 Multiplexer, one 2-input Exclusive-OR gate, one 2-input AND gate, one 2-input OR

gate and one Inverter.

c) Registers R1 and R2 of a computer contain the decimal values 12000 and 6000

respectively. What is the effective address of the memory operand in each of the

following instructions?

i) MOV 20 (R1), R5 ii) STORE R5, 30 (R1, R2)

iii) LOAD #3000, R5 iv) ADD -(R2), R5 (6M+5M+5M)

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3. a) What is microprogramming? Compare hard-wired control and micro-programmedcontrol.

b) A microinstruction has 6 control fields, each one triggering the following number of

control signals. What is the fewest number of control bits required to describe all thecontrol fields? (8M+8M)

4. a) Explain the Booths algorithm for signed number multiplication.b) Perform the 2s complement multiplication for the signed integer operands:

(-13) * (-10) using Booths recoding scheme.


fractional mantissa and an excess-16, radix-4 exponent. What decimal number is

represented by a floating point number whose exponent is 10101 and mantissa is 111000and the sign bit set? (5M+5M+6M)

5. a) If each address space represents one byte of storage space, then how many addresslines are needed to access RAM chips arranged in a 4 X 6 array, where each chip is

8K X 4 bits?

b) A computer system has a main memory and the cache memory, consisting of 1M 16-

bit words and 4K words respectively. The cache memory is organized in the block set

associative manner with 4- blocks per set and 64 words per block.

i) How many bits are required for addressing the main memory?

ii) How many bits are needed to represent each of the TAG, SET and WORD field?

(8M+8M)

6. a) Compare device polling and daisy chaining.b) What is an I/O processor? Explain with a neat diagram.c) What is an UART? Explain the internal configuration of UART. (5M+5M+6M)

7. a) What is a memory interleaving? Compare high-order and low-order interleaving.b) What are the salient features of RISC processors? Explain.

c) What is an array processor? Explain the SIMD array processor organization.

(5M+5M+6M)

8. a) Compare shared memory and multi-port memory.b) What is an inter-processor synchronization? Explain.

c) Design an 8 X 8 Omega network and derive the hardware complexity of it.

(5M+5M+6M)

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All Questions carry Equal Marks*********

1. a) What do you understand by i) steady and unsteady flow, ii) uniform and non-uniformflow in the case of channels?

b) An irrigation channel of trapezoidal section, having side slope s 3 horizontal to 2 vertical,

is to carry a flow of 10 cumec on a longitudinal slope of 1 in 5000. The channel is to be

lined for which the value of friction coefficient in Mannings formula is n = 0.012. Find the

dimensions of the most economic section of the channel. (6M+10M)

2. a) A horizontal rectangular channel 4 m wide carries a discharge of 16 m3/s. Determinewhether a jump may occur at an initial depth of 0.5 m or not. If a jump occurs, determine thesequent depth to this initial depth. Also determine the energy loss in the jump.



3. a) Define the term dimensional analysis and model analysis.b) In 1:40 model of a spillway, the velocity and discharge are 2 m/s and 2.5 m

3/s. Find the

corresponding velocity and discharge in the prototype. (8M+8M)

4. a) A jet of water of 10 cm diameter is discharging under a constant head of 80 m. Find theforce exerted by the jet on a fixed plate. Take coefficient of velocity as 0.9.b) Show that the force exerted by a jet of water on an inclined fixed plate in the direction of

the jet is given by Fx= aV2

Sin2 , where a= Area of the jet, V= velocity of the jet and

=inclination of the plate with the jet. (6M+10M)

5. a) Explain briefly the principles on which a Kaplan turbine works.b) Explain the different types of the efficiency of a turbine (8M+8M)

6. Explain i) Unit speed, ii) Unit discharge, iii) Unit power of a hydraulic turbine. Deriveexpressions for each of them. (16M)

7. What do you mean by manometric efficiency, mechanical efficiency and overall efficiencyof centrifugal pump? (16M)

8. a) Discuss in detail estimation of hydropower potential.b) Explain the terms i) load factor and ii) utilization factor. (10M+6M)

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1. a) Derive the condition for the best side slope of the most economical trapezoidal channel.b) Design a concrete lined channel to carry a discharge of 500 cumecs at a slope of 1 in

4000. The side slopes of the channel may be taken as 1:1. The Mannings roughness

coefficient for the lining is 0.014. Assume permissible velocity in the section as 2.5 m/s.

(8M+8M)

2. a) Show that in a rectangular open channel the critical depth is two thirds of specific energy.b) A trapezoidal channel having bottom width 8 m and side slope 1:1, carries a discharge of

86 m3

/sec. Find the depth conjugate to initial depth of 0.80 m before the jump. Alsodetermine the energy in the jump. (8M+8M)

3. a) State Buckinghams - theorem. Why this theorem is considered superior to Rayleighsmethod for dimensional analysis?

b) A dam 15 m long is to discharge water at the rate of 120 cumecs under a head of 3 m.

Design the model, if the supply available in the laboratory is 50 l/s. (8M+8M)

4. a) Define the terms: i) Impact of jets, and ii) Jet propulsion.b) Obtain an expression for the force exerted by a jet of water on a fixed vertical plate in the

direction of the jet. (6M+10M)

5. a) How will you classify the turbines?b) Differentiate between turbines and pumps. (8M+8M)

6. What do you understand by the characteristics curves of turbine? Name the importantcharacteristics of a turbine. (16M)

7. Define a centrifugal pump. Explain the working of a single stage centrifugal pump with neatsketches. (16M)

8. a) Compare and contrast between hydropower station and thermal power station.b) List out twelve important hydropower plants in India. (10M+6M)

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1. a) A trapezoidal channel has a bed width of 5 m, side slopes of 1 upon 1.5 and Manningsn = 0.015. Compute the critical slope and the corresponding discharge for a critical depth of

2 m.

b) Derive the condition for depth of flow of a most economical circular channel section

subject to the condition for maximum velocity. (8M+8M)

2. a) A rectangular channel carries a discharge of 2 m3/sec per meter width. If the loss ofenergy in the hydraulic jump is found to be 2.80 m, determine the conjugate depths before

and after the jump.

b) Explain the term hydraulic jump. Derive an expression for the downstream depth ofhydraulic jump. (8M+8M)

3. a) What do you mean by dimensionless numbers? Name any three dimensionless numbersb) A 1:50 spillway model has a discharge of 1.5 cumecs. What is the corresponding

prototype discharge? If a flood phenomenon takes 6 h to occur in the prototype, how long

should it take in the model? (8M+8M)

4. a) Obtain an expression for the force exerted by a jet of water on a fixed vertical plate in thedirection of the jet

b) A jet of velocity of 20 m/s strikes a flat plate inclined at 30 with the axis of the jet. If the

cross sectional area of the jet is 20 cm2, find the force exerted by the jet on the plate. Also

calculate the components of the force in the direction normal to the jet. Find also the ratio inwhich the discharge gets divided after striking the plate. (10M+6M)

5. a) A pelton wheel, working under a head of 400 m, produces 12000kW at 400 rpm. If theefficiency of the wheel is 80%, determine i) discharge of the turbine, ii) diameter of the

wheel and iii) diameter of the nozzle (assume suitable data)

b) With a neat sketch discuss layout of a typical hydropower installation. (8M+8M)

6. a) How does the load variation on generator have effect on turbine in hydropowerinstallation? What is the role of a governor?

b) What are unit quantities? Define the unit quantities for turbine. (8M+8M)

7. a) Discuss in general the main operating characteristics of a centrifugal pump. What is theimportance of constant efficiency curves?

b) Define cavitation. What are the effects of cavitation. (8M+8M)

8. a) Discuss in detail estimation of hydropower potential.b) Explain the terms i) load factor and ii) utilization factor. (10M+6M)

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1. a) A trapezoidal channel has a bottom width of 6 m and side slopes of 1:1. If the depth offlow is 1.5 m at a discharge of 20 m

3/sec, compute the specific energy and the critical depth.

b) Explain the terms specific energy of a flowing liquid, minimum specific energy, critical

depth, critical velocity and alternate depths as applied to non-uniform flow. (8M+8M)

2. State and discuss the assumption made in the derivation of the dynamic equation forgradually varied flow. Starting from first principles derive equations for the slope of the

water surface in gradually varied flow with respect to i) channel bed, ii) horizontal. (16M)

3. a) What do you mean by fundamental units and derived units? Give examples.b) An aeroplane model of scale ratio 1:30 is tested in water, which is 50 times more viscous

and 800 times more dense than the air. If the pressure drop in the model during test is 225.63

N/m2, find the corresponding pressure drop in the prototype. (8M+8M)

4. a) Derive an expression for the force, work done, and efficiency of a moving curved vane.b) A jet of water diameter 0.12 m moving with a velocity of 30 m/s strikes a curved fixed

symmetrical plate at the center. find the force exerted by the jet of water in the direction of

the jet, if the jet is deflected through an angle of 120 at the outlet of the curved plate.

(10M+6M)

5. a) A Pelton wheel turbine produces 20 MW while running at 700 rpm under an effectivehead of 1700 m. Calculate, i) least diameter of the jet, ii) mean diameter of the runner and

iii) Number of buckets.

b) Explain the different types of the efficiency of a turbine. (8M+8M)

6. a) What is cavitation? How can it be avoided in reaction turbine?b) What is the basis of selection of a turbine at a particular place? (8M+8M)

7.

a) Explain condition in which two pumps may be operated in series or in parallel.b) What is multistage pump and what are its advantages. (8M+8M)

8. a) What is mass curve? Explain the procedure for preparing a mass curve and also its uses.b) What area the essential stream flow data for water power studies. (8M+8M)

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ELECTRICAL MACHINES-II

(Electrical and Electronics Engineering)Time: 3 hours Max. Marks: 80



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1. a) Discuss the principle of operation and construction of a single phase transformer.b) A single-phase transformer takes 5 A on no-load at a power factor of 0.1. The turns ratio

is 2:1. If the load on the secondary is 100 A at power factor of 0.80 lagging, find theprimary current and power factor. Neglect the voltage drops in the windings.

2. a) Describe briefly various losses in a transformer and also obtain the condition formaximum efficiency.b) A 40 kVA, 6600/250 V single-phase transformer has the following parameters: R1 = 8 ,

R2 = 0.02 , X1 = 15 , X2 = 0.05 . Find full-load regulation at power factor.i) 0.8 lagging, ii) unity and iii) 0.8 leading.

3. a) Discuss the advantages, disadvantages and applications of auto-transformers. Compare itwith a two winding transformer.

b) Two single-phase transformers rated 1000 kVA and 500 kVA have per unit leakage

impedance of (0.02 + j0.06) and (0.025 + j0.08) respectively. What is the largest kVA load

that can be delivered by the parallel combination of these two transformers without

overloading any one?

4. a) Explain the principle of three-phase to two-phase conversion using scott-connectedtransformers.

b) A 3-phase, 50 Hz, transformer has a delta connected primary and star connected

secondary. The line voltages are 22000 V and 400 V respectively. The secondary has a starconnected balanced load at 0.8 p.f. lag, the line current in the primary 5 A. Determine the

current in each coil of primary and in each secondary line. What is the output of the

transformer in kW?

5. a) Deduce the equation for rotor current of a 3-phase induction motor. What determines thevalue of current in the rotor conductors at stand still and under running conditions.b) In a 6-pole, three-phase, 50 Hz induction motor with star-connected rotor, the rotorresistance is 0.25 /phase, the reactance at

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