Mech All Questionpaper St.joseph

8/10/2019 Mech All Questionpaper St.joseph

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Reg. No.

B.E / B.Tech DEGREE INTERNAL ASSESSMENT EXAMINATION I,

AUGUST 2014

BRANCH: MECHANICAL ENGINEERING

SEMESTER:III

(Regulation : 2013)

CE 6306STRENGTH OF MATERIALS

Time : 3 Hours Answer ALL Questions Max.Marks : 100

PARTA (10 x 2 = 20 Marks)

1.

State Hookes law.

2.

State the principle of superposition.

3.

Define bulk modulus.

4. A brass rod 2 m long is fixed at both ends. if the thermal stress is not toexceed 76.5 N/mm calculate the temperature through which the rod

should be heated. Take the values of and E as 17 x10-6 /k and 90Gparespectively.

5.

Define principal plane and principal stresses.

6. What do you understand by the term Point of contraflexure?7.

Define section modulus.

8.

Write the formula to find the shear stress distribution for a rectangular

beam section and sketch the shear stress distribution.9.

State the theory of simple bending.

10. What is mean by positive or sagging BM?

PART B(5 16 = 80 Marks)

11. (a) A Mild steel rod of 20 mm diameter and 300 mm long is enclosed

centrally inside a hollow copper tube of external diameter 30 mminternal diameter 25 mm. The ends of the rod and tube are brazed

together, and the composite bar is subjected to an axial pull of 40 kN. If E

for steel and copper is 200 GN/m2 and 100 GN/m2 respectively, find the

stresses developed in the rod and the tube also find the extension of the rod.

(OR)

(b) Find the value of P and the change in length of each component and thetotal change in length of the bar shown in figure.

12.

(a) A metallic bar 250mm x 100mm x 50mm is loaded as shown in figure.

Find the change in volume. Take E=2 x 105N/mm2 and the Poissonsratio = 0.25. also find the change that would be made in the 4MN load, in

order that three should be no change in the volume of the bar.

(OR)(b) A steel tube 30mm external diameter and 25mm internal diameter

encloses a gun metal rod 20mm diameter to which it is rigidly joined ateach end. The temperature of the whole assembly is raised to 150c. find


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the intensity of the stress in the rod when the common temperature has

fallen to 20c.the value of the youngs modulus for steel and the gun

metal are 2.1 x 105N/mm

2.and 1 x 10

5N/mm

2.N/mm2respectively. The

co-efficient of liner expansion for steel is 12 x 10-6

/0C and for gun metal

is 20 x 10-6

/0

C.13. (a) A rectangular block material is subjected to a tensile stress of

90N/mm2 along x-axis and a compressive stress of 45N/mm2 on a plane atright angle to it, together with shear stresses of 80N/mm2 on the sameplane calculate.

i) The direction of principal planes.ii) The magnitude of principal stresses.

iii) The magnitude of the greatest shear stress.

(OR)

(b) A beam 8m long is simply supported at the ends and carries a uniformlydistributed load of 1500N/m and three concentrated load of 1000N,2000N and 4000N acting respectively at the left quarter point, centre

point and right quarter point. Draw SFD and BMD.

14. (a) Draw the shear force and bending moment diagram for the loadedbeam shown in fig.

(OR)

(b) A Cantilever 1.5 m long carries a load of 2 tons at its free end, andanother load 1 ton at a distance of 0.5 m from the free end. Draw shearforce and bending moment diagrams for the cantilever.

15. (a) Draw the SF and BM diagrams for the beam shown in the figure.

Determine the points of contra flexure.

(OR)

(b) The cast iron beam is of T- section as show in the figure. The beam issimply supported on a span of 6m. thebeam carries a uniformly

distributed load of 2KN/m on the entire length (span). Determine themaximum tensile and maximum compressive stress


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4/21

Reg. No.


AUGUST 2014


SEMESTER:VII

(Regulation : 2008)

ME2401 MECHATRONICS



1.What is mechatronics?2.

Define systems.

3.

Explain about control systems

4.

Explain about liquid level sensor.5.

Define velocity sensor.

6.

Define mechanism

7.

What is CAM?

8.What you mean by thyristors

9.Give details about diodes

10.Write down the different type of motors

PartB ( 5 x 16 = 80 marks)

11.a) Explain about briefly open loop and closed loop systems.

ORb) What are the performance terminologies is required for

sensor?

12.

a)How we select the sensor? Explain any two temperature

measurement sensor.

ORb)Give an example of microprocessor based controller and

briefly explain about the diagram

13.a) Explain the static and dynamic characteristics of sensors

OR

b) Explain about mechanical actuation systems very briefly.

14.a) Explain about electrical actuation systems very briefly.

OR

b)Explain about stepper motor specifications & also explain

its working principle.

15.

a)What are the various types of ball bearing ? Mention the

application of each type.

ORb)A compound gear train consists of the final driven wheel

with 15 teeth which meshes with a second wheel with 90

teeth. on the same shaft as the second wheel is a wheel with

15 teeth. This meshes with a fourth wheel, the first driver,

with 60 teeth. What is the overall gear ratio?


5/21

Reg.No.


AUGUST 2014


SEMESTER:III

(Regulation : 2013)

EE6351 ELECTRIC DRIVES AND CONTROL



1.

Define cooling time constant?2.

Give the important parts of electrical drives?

3. Give some advantages of electrical drives?4.

Define thermal overloading factor for a motor working on short time duty.

5.

What is meant by continuous rating?

6. DC series motor should be started only with load why?

7.

What is meant by regenerative braking?8. State the advantage of electrical braking.9.

Write down the torque equation of DC shunt motor.

10.

List the types of single phase induction motor.


11

A) Explain in detail the various factors inflation the selection of anelectrical drive for a particular application.

((OR)

B) i) Explain the different types of Electrical drives.ii) State and explain the disadvantages of using a motor of wrong

rating.

12

A) Explain the different classes of motor duty with a net sketch.(OR)

B) i) Explain the thermal model of an electric motor fora) Heating the electric motor when starting from cold.

b) Cooling the electric motor when it is switched OFF from

the mains.

ii) The temperature rise of motor after operating for 30minutes

on full load is 20oC and after another 30 minutes it becomes

30oC on the same load. Find the final temperature rise and

time constant.

13

A) Explain the method of estimating equivalent continuous powerrating of motor for short time load application.

(OR)

B) Explain the modifications to the speed- torque characteristicsof DC shunt motor for the following:

i) With increase in armature resistance.

ii) By field weakening.

14

A) Explain with neat sketch the different methods of braking used inDC shunt motor. Compare their Relative merits and demerits?

(OR)B) A 220V DC series motor runs at 1200 rpm (clockwise) and

takes an armature current of 80A when driving a load withconstant torque. Armature resistance is 0.05. Find themagnitude and direction of motor speed and armature current

if the motor terminal voltage is reversed and the number ofturns in field winding is reduced to 80%.Assume linear

magnetic circuit.

15

A) State and explain the important features of various braking

methods for an Induction motor.(OR)

B) Explain the speed torque characteristics of single phase

induction motor and three phase induction motor


6/21

Reg. No.


AUGUST 2014


SEMESTER:V

(Regulation : 2008)

ME2301 THERMAL ENGINEERING



1.

List out an two assumptions for the analysis of thermodynamic air cycles.

2.

Which air standard cycle (Otto/Diesel/ Dual) is more efficient for the same

heat input? Justify3.

Define cut-off ratio for a Diesel cycle4.

Draw the P-V diagram for Dual- combustion cycle.

5.

What is the effect of compression ratio on efficiency of Otto cycle?

6. State the merits of a Diesel engine over petrol engine.7.

What are the functions of piston rings?

8.

Define the term Brake power.9.

What is splash lubrication?10.

What is calorific value?


11.a)(i) Derive an expression for the air standard efficiency of Diesel

cycle and then deduce it for mean effective pressure.

ORb)(i) Draw the actual p-v diagram of an Otto cycle and discuss the

deviation from an ideal cycle.

(ii) For air standard diesel cycle the following is available.

Compression ratio=16, Heat added/kg=2500KJ/kg,Lowest

temperature in the cycle=300K, Lowest pressure in the cycle=1

bar. Calculate (1) Pressure and temperature at each point in thecycle. (2) Thermal efficiency. (3) Mean effective pressure if air

flow rate 0.25kg/sec.Assume Cp=1Kj/kg-K and Cv=0.714KJ/kg-K.

12.a) Air at 1.01 bar, 20C is admitted into an oil engine, which isworking on the dual combustion cycle. The maximum cycle

pressure is 69 bar. The compression ratio is 18. Assuming that the

heat added at constant volume is equal to the heat added at constant

pressure. Calculate the following:

(i)

temperature at all salient points (ii) total heat supplied(ii)

heat rejected (iv) air standard efficiency

OR

b)A gas turbine works on an air standard Brayton cycle. The initial

condition of the air is 25C and 1 bar. The maximum pressure andtemperature are limited to 3 bar and 650C. Determine thefollowing:

(i)Cycle efficiency(ii)

Heat supplied and heat rejected/kg of air

(iii) Work output/kg of air (iv) exhaust temperature.

13. a)An engine working on an ideal air standard diesel cycle has thecompression ratio 15 and heat transfer 1400KJ/kg. Find the pressure andtemperature at the end of the each process of the inlet conditions are 280K

and 1.1 bar. Find also the air standard efficiency and mean effective

pressure.

OR

b) Explain the construction details of I.C. engine

14.a) Describe the working of four- stroke SI engine along with valve

timing diagram.

OR

b) Explain the working of Magneto ignition system and compare its

merits and demerits with battery ignition system.

15.a)(i) Compare two- stroke and four stroke engine.(ii) Compare petrol and Diesel engine.

OR

b)A six cylinder four stroke petrol engine has a swept volume of 300 cubic

cm per cylinder, a compression ratio of 10 and operates at a speed of

3500 rpm. If the engine is required to develop an output of 73.5 KW atthis speed, calculate the cycle efficiency, the necessary rate of heat

addition, the mean effective pressure, maximum temperature of the cycle

and efficiency ratio. The pressure and temperature before isentropic

compression are 1.0 bar and 15C respectively, take Cv= 0.72 and =1.4.


7/21

Reg. No.


AUGUST 2014


SEMESTER:VII

(Regulation : 2008)

ME2029 DESIGN OF JIGS, FIXTURES & PRESS TOOLS



1.

Define locating device.

2.

What is meant by 3-2-1 principle of location?

3.

Differentiate between jigs and fixtures.

4.List the standard parts used in jigs and fixtures fabrication.

5.Explain the term redundant location.

6.Define sandwich jig.

7.

Distinguish between a pot jig and a box jig.

8.

Write the specific requirements of a turning fixture.

9.

Illustrate the working of an automatic drill jig.

10.Mention the application of turning fixture.


11.

a) (i)Explain briefly materials used in jigs and fixture.

(ii)Mention the advantages of using jigs and fixtures.

ORb)Explain with the help of suitable sketches the operation

principles of power clamping system. Also, state its advantages

12.

a)What are the various location devices? Explain any four of themin with aid of suitable sketches.

OR

b)What is the primary function of a linear bushing? List out any

four types of drill bushes with its method of fixing and

locking

13.a)What is meant by clamping? Explain the principles involved in the

design of clamp?(16)

OR

b)Explain briefly box jig and turnover jig.

14.a)Sketch and explain air operated drilling jig components

ORb)Describe the working of rack and pinion operated drill jig and

compare

with pneumatic jig.

15.

a)Explain briefly universal jig and plastic jig.

ORb)Design a drill jig make a hole of diameter 8 mms shown in fig.

from conical pipe and also mentions the part list


8/21

Reg. No.


AUGUST 2014


SEMESTER:VII

(Regulation : 2008)

ME2027 PROCESS PLANNING AND COST ESTIMATION



1.

What are therbligs?

2. What is meant by work measurement?

3.

Define performance rating?.

4.

What do you mean by standard time?

5. State some application of ergonomics?

6.

What are the advantages of manual process planning?

7.

What are the factors affect process planning?

8.

What is decision table?

9.

What is manufacturing logic?

10.

What are the advantages of manual process planning?

PART B

(5 16 = 80 Marks)11.

(a). Explain the significance, construction and applications of the

following recording techniques:

(i) Outline process chart;

(ii) Flow process chart;

(OR)

(b) State and explain in brief the steps involved in method study

procedure.

13.

(a) Briefly explain the various techniques of work measurement.

( OR )

(b) What is meant by ergonomics? Describe the objectives of the

study of ergonomics.

13(a).The mean observed time and the rating factor of the five elements

of a job are as follows:

Element A B C D E

Mean observed time in min. 0.3 0.6 2.2 1.4 1.5

Rating factor in % 130 100 80 110 90

Determine the allowed time for the job taking fatigue, personal and

contingency allowances as 5%, 10%,and 5% respectively.

( OR )

(b) Compare and contrast the features of a variant and generative

CAPP system

14. (a) Write short notes on 'tools for developing manufacturing logic

and knowledge'.

( OR )

(b) What are the advantages and limitations of using?

(i) Flow charts (ii) decision tables?15. (a) (i) List the information required for process planning.

(ii) Explain in detail the process planning activities

(or)

(b) What is meant by CAPP? List out the benefits of CAPP systems


9/21

B.E / B.Tech DEGREE INTERNAL ASSESSMENT EXAMINATIONS I, AUGUST 2014

COMMON TO ALL BRANCHES

SEMESTER III

MA6351TRANSFORMS AND PARTIAL DIFFERENTIAL EQUATIONS

(Regulation 2013)

Time : 3 Hours Answer ALL Questions

Max. Marks 100

PART-A (10 x 2 = 20 Marks)

1. Find the Complete integral of 2. Form the PDE by eliminating the arbitrary function from ()3. Solve

4. Solve 5. Find the Particular integral of 6. State the Dirichlets conditions for Fourier series.

7. If 50, if

Find the sum of the Fourier series of 8. If is discontinuous at , what does its Fourier series represent at thatpoint?

9. What is meant by Harmonic Analysis?

10. Find the constant term in the expansion of as a Fourier series inthe interval

.

PARTB (5 x 16 = 80 Marks)

11. a) (i) Form the PDE by eliminating the arbitrary function from

0),( 222 czbyaxzyx

(ii) Solve 4)sinh()2( 222

yxeyxzDDDD

OR

b) (i) Solve221 qpqypxz

(ii) SolveyxezDDDDDD )362( 22

Reg. No.


10/21

12. a) (i) Solve22222 zqypx

.

(ii) Solve the equation )2cos()44( 3223 yxzDDDDDD .

OR

b) (i) Solve )()()( 222222 yxzqxzypzyx

(ii) Form the PDE by eliminating the arbitrary function from the relation

)()( ctxgctxfz

13. a) (i) Solve xyy

z

yx

z

x

z

cos6 2

22

2

2

(ii) Solve ))(()()( yxyxqxyzpxzy

OR

b) (i) Expand as Fourier series in and hence deducethat the sum of

+.(ii) Find the Fourier series as far as the second harmonic to represent the

function with theperiod 6, given in the following table

0 1 2 3 4 5 9 18 24 28 26 20

14. a) (i) Obtain the Fourier series for the function given by { . Hence deduce that = .(ii) Compute up-to first harmonics of the Fourier series ofgiven by the

following table.

x 0 T

f(x) 1.98 1.30 1.05 1.30 -0.88 -0.251.98

OR

b) (i) Find the Fourier series of in and hence deduce that .(ii) Obtain the Fourier cosine series of

15. a) (i) Obtain the Fourier series of (ii) Find the half-range sine series of in the interval (0,4). Hence

deduce the value


11/21

of the series

OR

b) (i) Obtain the Fourier series of the periodic function defined by

{ .Deduce that

.(ii) Obtain the half range cosine series for in


12/21

Reg. No.


AUGUST 2014


SEMESTER:V

(Regulation : 2008)ME2302 DYNAMICS OF MACHINERY


PARTA (10 x 2 = 20 Marks)1.

Define static force analysis.

2. Differentiate between static and dynamic equilibrium

3. State DAlemberts principle.

4. Explain the term maximum fluctuation of energy in fly wheel.

5.

List out the few machines in which flywheel is used

6.

What is meant by balancing of rotating masses?

7.

Why rotating masses are to be dynamically balanced?

8.

Define static balancing.

9. State the conditions for static and dynamic balancing.

10.

Define swaying couple.

PartB ( 5 x 16 = 80 marks)11.(a).In a reciprocating engine mechanism, if the crank and connecting rod are 300mm

and 1m long respectively and the crank rotates at a constant speed of

200r.p.m.Determine analytically,

1. The crank angle at which the maximum velocity occurs and

2. Maximum velocity of piston.

(OR)

(b).The radius of gyration of a fly wheel is 1meter and fluctuation of speed is not to

exceed 1% of the mean speed of the flywheel. If the mass of the flywheel is

3340kg and the steam develops 150KW at 135rpm, then find, 1.Maximumfluctuation of energy,2. Coefficient of fluctuation of energy.

12.(a).The crank and connecting rod of a horizontal reciprocating engine are 200mm and

1meter respectively.The crank is rotating at 400rpm.When the crank has turned

30 from the inner dead center, the difference of pressure between cover end and

piston rod is 0.4 N/mm2.If the mass of the reciprocating parts is 100Kg and a

cylinder bore is 0.4meters.Calculate(i)Inertia force (ii) Force on piston (iii) Piston

effort (iv) Thrust on the side of the cylinder walls (v) Thrust in the connecting rod

(vi)Crank effort. (16)

(OR)(b).The turning moment diagram for a petrol engine is drawn to a scale of 1mm to 6Nm

and the horizontal scale of 1mm to 1.The turning moment repeat itself after every

half revolution of the engine. The area above and below the mean torque line are

305, 710, 50,350,980and 275mm2.The mass of rotating parts is 40kg at a radius ofgyration of 140mm.Clculate the coefficient of fluctuation of speed if the mean

speed is 1500rpm. (1

13.(a).Derive the expression for velocity and acceleration of the piston.

(OR)(b).Derive the following expression of effects of partial balancing in two cylinder

locomotive engine (i) Variation of tractive force (ii) Swaying couple (iii) Hammer

blow.

14.(a).The crank of a two cylinder uncoupled inside cylinder locomotive are at right

angles and are 300 mm long. The distance between centre lines is 650 mm. The

wheel central lines are 1.6 m apart. The reciprocating mass pair cylinder is 300 kg.

The driving wheel diameter is 1.8 m. If the hammer blow is not to exceed 45 kN

at 100 km/hr. Determine(i) The fraction of the reciprocating masses to be balanced

(ii)The variation in tractive effort

(iii)The maximum swaying couple

(OR)(b).The following particulars are related to an outside cylinder of an uncoupled

locomotive:Revolving mass per cylinder = 300 kg; Reciprocating mass per

cylinder = 450 kg; Length of each crank = 350 mm; Distance between wheels =

1.6 m; Distance between the cylinder centres =1.9 m; Diameter of the driving

wheels = 2m; Radius of balancing mass = 0.8m; Angle between the cranks = 90.

15.(a).Four masses m1, m2, m3 and m4 are 200 kg, 300 kg, 240 kg and 260 kg

respectively. The corresponding radii of rotation are 0.2 m, 0.15 m, 0.25 m and

0.3m respectively and the angles between successive masses are 45, 75 and 135.

Find the position and magnitude of the balance mass required by analytical method

and graphical method, if its radius of rotation is 0.2 m.

(OR)(b).A, B, C and D are four masses carried by a rotating shaft at radii 100, 125, 200 and

150 mm respectively. The planes in which the masses revolve are spaced 600 mm

apart and the mass of B, C and D are 10 kg, 5 kg, and 4 kg respectively. Find the

required mass A and the relative angular settings of the four masses so that the

shaft shall be in complete balance.


13/21

Reg. No.


AUGUST 2014


SEMESTER:VII(Regulation : 2008)

ME2028 ROBOTICS



1.

Define a Robot.

2.

What is meant by Quality of robot?

3.

Classify the motion control of robot arm?

4.

What is meant by Work envelope?5.

Write the basic principle of servo motor.

6. Give some examples of robot end effector.

7. What are the types of Mechanical Grippers?

8. What is meant by Gripper?

9. List out the types of Drive systems used in Robots.

10.Write the characteristics of actuating systems.

PART B(516= 80 Marks)11.

a) i) Write short notes on Joint Notation Scheme.ii) Write short notes on technical specification in Robotics.

(OR)b) List out four common robot configuration and explain its

application

12.

a) Explain robot parts and their functions with neat sketch

(OR)

b) Explain Various Industrial Applications of Robots.

13.

a) Draw the neat sketch of component of teach pendant and

explain

briefly.(OR)

b) Explain Mechanical drives system with neat sketch.

14.a) Discuss the types of drive systems used in robots.(OR)

b)Explain Pneumatic actuators system with neat sketch.

15.

a) i) Write notes on Gripper selection and design.

ii) Write a note on Magnetic Grippers.(OR)

b) With suitable illustration, explain the working of a

external and

internal grippers.


14/21

Reg. No.


AUGUST 2014

BRANCH: COMMON TO AUTOMOBILE & MECHANICAL

SEMESTER:III(Regulation : 2013)

CE6451 FLUID MECHANICS AND MACHINERY



1. Define Newtons Law of viscosity

2. Distinguish between mass density and specific weight

3. Define surface tension and express its unit

4. Define capillarity

5.

What are the major assumptions made in the derivation of the

Bernoullis equation

6. Differentiate between laminar and turbulent flow

7. Mention the types of minor losses

8. Differentiate between hydraulic gradient line and energy gradient line

9. Derive Hagen-poiseuille equation state the assumption made.

10. What do you mean by flow through parallel pipes

PARTB ( 5 x 16 = 80 marks)

11.(a).An oil film of thickness 10mm is used for lubrication between the two square

parallel plates of size 0.9m0.9m each, in which the upper plate moves at 2m/s

required a force of 100N to maintain this speed. Determine (1) dynamic viscosityof oil and (2) kinematic viscosity of oil , if the specific gravity of the oil is 0.95

OR(b).A pipeline 60cm diameter bifurcates at a Y-junction into two branches 40cm and

30cm in diameter. If the rate of flow in the main pipe is 1.5m3/s, and the mean

velocity of flow in the 30cm pipe is 7.5m/s, determine the rate of flow in the 40cmpipe.

12. (a).A vertical venturimeter 40 cm x 20 cm is provided in a vertical pipe to measure aflow of oil of relative density 0.8. The difference in elevations of the t hroat section

and the entrance sections in 1 m, the direction of flow of oil being verticallyupwards. The oil-mercury differential gauge shows deflection of mercury equal to40 cm. Determine the quantity of oil flowing the pipe. Neglect losses.

OR

(b).An orifice meter with orifice diameter 15 cm is inserted in a pipe of 30 cm

diameter. The pressure difference measured by a mercury oil differentialmanometer on the two sides of the orifice meter gives a reading of 50 cm of

mercury. Find the rate of flow of oil of sp.gr 0.9 and Cd= 0.6.

13.(a).Derive the Eulers equation of motion and deduce the expression to BernoullisEquation.

OR

(b).Derive an expression for darcy weisback equation state the assumptions made.

14.(a).A horizontal pipe line 40 m long is connected to a water tank at one end anddischarges freely into the atmosphere at the other end. For the first 25 m of its

length from the tank, the pipe is 150 mm diameter and its diameter is suddenlyenlarged to 300 mm. The height of water level in the tank is 8 m above the centreof the pipe. Considering all losses of head which occur, determine the rate of flow.

Takef= 0.01 for both sections of the pipe.OR

(b).A pipe of diameter 0.4 m and of length 2000 m is connected to a reservoir at oneend. The other end of the pipe is connected to a junction from which two pipes oflengths 1000 m and diameter 300 mm run in parallel. These parallel pipes are

connected to another reservoir, which is having level of water 10 m below the waterlevel of the above reservoir. Determine the total discharge if f = 0.015. Neglectminor losses.

15.(a).An oil of sp gr 0.7 is flowing through a pipe of diameter 300mmm at therate of

500 liters/. Find the head lost due to friction and power required to maintain

the

flow for a length 1000m. take = 0.29 strokes.

OR

(b).A horizontal pipe of diameter 500mm is suddenly contracted to a diameterof

250mm. the pressure intensities in the large and smaller pipe is given as

13.734N/cm2 and 11.772 N/cm2 resp. find the loss of head due to contraction if

Cc=0.62.

Determine the rate of flow of water.


15/21

Reg. No.


AUGUST 2014


SEMESTER:VII(Regulation : 2008)

ME2034 NUCLEAR ENGINEERING



1. What is an isotope?

2.

Define the term half-life

3.

What is nuclear binding energy?

4.

Mention the two types of scattering cross section.

5.

What is called plum pudding?

6.

What are called fissile isotopes?

7.

What is nuclear fission?

8. Give the steps of proton-proton chain of fusion reaction?

9.

List down the requirements of a moderator

10.Name the methods used to concentrate and purify uranium.

Part

B ( 5 x 16 = 80 marks)

11. a) Explain the concept of elastic scattering and discuss how in

elastic scattering differs elastic scattering

OR

b) Differentiate neutron Scattering and neutron absorption

12.

a) Write a brief note on neutron interaction and cross section

OR

b)Explain and discuss on various nuclear models.

13. a)Write short notes on Ruther ford model of an atom

OR

b)Explain clearly Nuclear fuel cycle with neat sketch

Spent fuel characteristics

14.

a) What is chain reaction?How it is measured? What is the

difference between controlled and uncontrolled chain reaction?

OR

b)(i) Explain in brief how uranium material is produced and

purified.

(ii) Write short notes on the purification of thorium and

beryllium materials

15.

a) Explin the nuclear fission process with help of neat sketch

OR

b) What is the need for enrichment of uranium? Describe the most

efficient and elaborated methods suited to produce highly enriched U235.


16/21

Reg. No.


AUGUST 2014


SEMESTER : VII(Regulation: 2008)

ME2402 COMPUTER INTERGRATED MANUFACTURING



1. What are the main features of a CAD?

2. Define visual transformation

3.

What is the use of wireframe modeling?4. What are the advantages of solid modeling?

5. State the application of surface modeling

6. Define Islands of automation.

7. Distinguish between CIM-I and CIM-II

8. What is meant by physical distribution?9.

State the CASA/SME in CIM

10.

Define LAN.

PART

B (5 x 16 = 80 marks)

11.a) Describe some important features of AUTO CAD

package.

ORb) Explain in detail about Basic Modeling Transformer

12.

a) Compare the wire frame, surface and solid modeling with

examples

ORb) Explain solid modeling and explain in detail with neat

sketch

13.a) Rotate the rectangle (0,0), (2,0), (2, 2), (0, 2) shown

below, 30

CCW about its centroid and find the new coordinates of the

rectangle.

OR

b) Explain CASA?SME model of CIM

14.a) Explain Network Topologies-Star,Ring,and Bus

OR

b) Explain briefly the seven layers of ISO/OSI referencemodel

15.

a) What do you understand by term islands of automation?

List

and explain any six islands of automation.

OR

b) Discuss about serial and parallel data transmission


17/21

Reg. No.


AUGUST 2014

BRANCH: AUTOMOBILE & MECHANICAL


ME6301 ENGINEERING THERMODYNAMICS



1.

Define quasi-static process.2.

What is PMM-I and why it is impossible?

3.

What is meant by continuum and identify its importance?

4.

State First law of Thermodynamics for a cyclic process.

5.Define heat and thermodynamic definition of work.6.

Draw schematic sketch of refrigerator and heat pump.

7.

State Kelvin Plancks statement of II law of thermodynamics8.

In a isothermal process 1000kJ of work is done by the system at a

temperature of 200C. What is the entropy change of this process?

9.Define Entropy.10.

Define first law efficiency of heat engine


11.

(a).(i).One litre of hydrogen at 273K is adiabatically compressed to

one half of its initial volume. Find the change in temperature ofthe gas. If the ratio of two specific heats for hydrogen (Cp/Cv=

1.4).

(ii).Derive the relationship between p,V and T for the followingprocesses.

(1). Isobaric (2). Isochoric (3). Isothermal (4). Isentropic (5)polytropic

OR(b).(i).A three cycle operating with nitrogen as the working

substance has constant temperature compression at 34C withinitial pressure of 100 kPa. Then the gas undergoes a constant

volume heating and polytropic expansion with 1.35 as index of

compression. The isothermal compression requires -67 kJ/kg of

work. Determine(1). P,v and T around the cycle. (2). Heat in and out

(3). Net work For Nitrogen Cv= 0.731 kJ/kgK.

(ii).Define enthalpy and how is it related with internal energy.12.(a).(i). Prove that for an isolated system, there is no change in internalenergy.

(ii).1 kg of gas at 1.1 bar 27C is compressed to 6.6 bar as per the lawpV1.3=

Constant. Calculate work and heat transfer, if (1). When gas is

ethane

(C2H6) with molar mass of 30 kg/k mol and Cpof 2.1 kJ/kgK. (2).When

the gas is argon (Ar) with molar mass of 40 kg/kmol and Cpof

0.52 kJ/

kgK. (OR)(b).(i). A reciprocating air compressor takes in 2 m3/min air at 0.11 Mpa,

298 Kwhich delivers at 1.5 MPa, 384 K to an after cooler where the air is

cooled

at constant pressure to298 K. The power absorbed by thecompressor is

4.15 kW. Determine the heat transfer in (i). The compressor (ii).

Thecooler. Also state your assumptions

(ii).The velocity and the enthalpy of fluid at the inlet of a certain

nozzles are

50 m/s and 2800 kJ/kg respectively. The enthalpy at the exit of

nozzle is

2600 kJ/kg. The nozzle is horizontal and insulated so that no heattransfer

takes place from it. Find (1). Velocity of the fluid at exit of the

nozzle (2).

Mass flow rate, if the area at inlet of nozzle is 0.09 m2(3). Exit area

of the


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nozzles, if the specific volume at the exit of the nozzle is 0.495

m3/kg.

13. (a).Derive the unsteady flow energy equation for filling and empty the

vessel. (16)

(OR)

(b). (i). An inventor claims to have developed an efficient heat enginewhich wouldhave a heat source at 1000C and reject heat to a sink at 50C and

gives anefficiency of 90%. Justify whether his claim is possible or not.

(4)

(ii).Explain the concept of entropy and prove that entropy is a property

of thesystem.

(12)

14. (a) (i).Derive an expression for change entropy for (1). Constant Volumeprocess

(2).Constant pressure Process.(10)

(ii).Explain in detail about principle of increase of entropy.

(6)

(OR)

(b). (i).List out and explain various causes of irreversibility.

(6)(ii).A heat engine operates between a source at 600C and a sink at

60C.Determine the least rate of heat rejection per kW net output of the

engine.

(10)

15. (a) . (i).Explain the terms availability and dead state.(4)

(ii).If 300 kJ of heat is reversibly added to 0.2 kg of air at constant

pressure and

the initial temperature is 300C. Find the change in available andunavailable

energies of the system. The temperature of the surroundings is 30C.

(12)

(OR)

(b).(i). A heat engine receives 800 kJ of heat from the reservoir at 1000 k and

rejects400 kJ at 400 K. If the surrounding is at 300 K, calculate the first and

second law efficiency and relative efficiency of the heat engine.(12)

(ii). Write short notes on entropy generation


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Reg. No.


AUGUST 2014

BRANCH:MECHANICAL ENGINEERING


ME6302 MANUFACTURING TECHNOLOGY-I



1. State any four types of patterns.

2. What are the advantages of applications of ceramic moulds?

3. What are the pattern materials?

4. State any four properties of moulding sand.

5. What is the necessity of sand testing?

6. What are the three types of oxy-acetylene flames?

7. What do you mean by friction welding?

8. What are the functions of flux in welding electrode?

9. What are the types of adhesives used in adhesive bonding?

10. What is the principle of Thermit welding?

PARTB ( 5 x 16 = 80 Marks)

11.(a) (i) Name the pattern allowances which can be quantitavely specified. (8)(ii)Which properties are desirable for moulding sand for sound casting? (8)

OR(b).(i)Explain the transfer moulding process. (8)

(ii).Describe the compression moulding process. (8)

12. (a). (i).Describe the operation of a cupola furnace for melting cast iron . (8)(ii).Compare precision investment casting and shell moulding from the point of

process,product and applications. (8)

OR(b). Sketch the various sand casting defects. Give their causes and remedies. (16)

13. (a). With suitable sketches,explain the various steps of investment casting process.

What are its advantages? (16)OR

(b). Briefly explain the different methods for inspection of castings. (16)

14. (a). Illustrate the thermit welding process with neat sketch and also state itsapplications.. (16)

OR

(b). (i).Explain the plasma arc welding process with a neat sketch and list out itsadvantages. (8)

(ii).Sketch the different types of weld defects and mention how they occur.(8)

15. (a). (i). Compare the laser beam welding with electron beam welding. (8)

(ii). Discuss the sequence of operations in friction welding. (8)OR

(b). (i). Describe with a neat sketch the components of oxyacetylene gas weldingequipment. (8)

(ii). Discuss principle of adhesive bonding. List out any four types of

adhesives. (8).


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Reg.No.


AUGUST 2014


SEMESTER:V

(Regulation : 2008)

ME2305 APPLED HYDRAULICS & PNEUMATICS



1. Explain (a) Hydraulics ( b) pneumatics ? C)

2. DefineFluid power ?

3.

Basic components of Hydraulics system?

4. Advantages of fluid power?

5.

What is actuator and its type?6. General types fluids

7. How do you classify pumps?

8.

Distinguish difference between fixed displacement and variable displacement

pumps?

9.

Define volumetric and mechanical efficiency?

10. What is Hydraulic pump?


11.(a).(i).Explain Hydraulic power(pascals law) with suitable example?

(8)

(ii).Explain about the properties of Hydraulic fluids? (8)

OR

(b).Fluid is flowing through the tapering pipe having diameter of 50mm and 25mm

at sections 1 and 2 respectively. The discharge through the pipe is 7.5 lps, the

section 1 is 3mm above datum and section 2 is 1.25mm above datum.if the

pressure at section 1 is 200kpa, find the pressure at section 2. The specific

gravity of the fluid is 0.9.

12.(a).With neat sketch explain the hydraulic and pneumatic fluid power systems?

(16)

OR

(b).Explain the following:

Pump characteristics curves

Pump cavitation

Pump noise

Pump selectionsss

13.(a).Explain various mechanism of hydraulic mountings with neat diagram(16)

OR

(b).Explain with the diagram the working principle of telescopic cylinder and

cylinder cushioning.

14.(a).With the neat sketch explain the hydraulic and pneumatic fluid power systems.

OR

(b).Working principle of balanced vane pump with neat sketch also write the

advantage and disadvantage? (16)

15.(a).Explain construction and operation of non positive displacement pump? (16)

OR

(b).Explain briefly about rotary actuators.(any two types)


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Reg.No


AUGUST 2014


SEMESTER:VII

(Regulation : 2008)

ME2403 POWER PLANT ENGINEERING



1. Mention a few characteristics of diesel power plant

2. What are the advantages of high pressure boiler?

3. What do you understand by MHD.

4. State the importance of load curves

5. State the advantages and disadvantages of the hydroelectric power plant.

6. What are the principles of stokers?

7. What are the advantages pulverized coal.

8. What are the uses of ash?

9. What are the types of dust collecting equipments?

10. What are the requirements of a modern surface condenser?


11. (a).What is the difference between Volex and Loffler Boiler? Explain with neat

sketch.

(OR)(b).(i).Draw and explain the working of Combined power cycle plants

(ii).What is the basis for selecting a site for hydro power plants?

12.(a).Explain the working of steam power plant with a schematic diagram

(OR)

(b).(i).Explain the unique feature of high pressure boilers.

(ii).Enumerate the advantages of fluidized bed boiler over conventional

13. (a).(i).Distinguish between hydro power plant and thermal power plant.

(ii).Distinguish between high pressure boiler and supercritical boiler.

(OR)

(b).(i).Draw an explanatory line diagram of an ash handling system employed in

steam power plants and also explains the difficulties encountered in the

handling of ash in a thermal power station.

(ii).Explain the difficult types of coal handling process.

14. (a). (i).Explain the principle involved in preparation of coal and what are the methods

of preparation?

(ii).What are the different types of dust collectors used?

(OR)

(b).What are the different types of pulverizing mills? Explain with its neat sketch.

15. (a).What are the methods used for control the pollutants

(OR)

(b). Explain the various draught systems with a neat sketch. (16)

Mech All Questionpaper St.joseph

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