Model Paper with answer

Q1 Which of the following has high electrical resistivity

(a) Copper (b) Gold (c) Carbon (d) Silver

Q2 The resistance of 200 m. long circular copper wire is 21Ω.If its thickness is 0.44mm,What is the resistivity(ohm-m) of the copper is

(a) 1.597*10-8 (b) 2.507*10-8 (c) 5.597*10-6 (d) None of these

Q3 Metals have temperature coefficient of resistance

(a) Positive (b) negative (c) May be positive or Negative (d) None of these

Q4 The resistance of two wire is 25Ω when connected in series and 6Ω when connected in parallel.The resistance of each wire is

(a) 12 &13Ω (b) 15&10Ω (c) 20& 5 Ω (d) 24&1Ω

Q5 A current of 3A flows through 10Ω resistor. The energy dissipated in 5sec.is

(a) 450J (b) 150J (c) 250J (d) None of these

Q6 Ideal current source has its internal resistance equal to

(a)1Ω. (b)2Ω. (c) 0Ω (d) InfiniteΩ

Q7 If resistance of all three branches of star connected load is 1Ω each, then the resistance of each branch of equivalent delta load would be

(a) 3Ω (b) 9Ω (c) 0.3Ω (d) 1/3Ω

Q8 A p.d. of 300V is maintained across the terminals of the capacitor. The electric field strength(kV/m) between the plate gap of (0.3mm) is

(a) 1000 (b) 2000 (c) 3000 (d) 4000

Q9 An 8micro-farad capacitor is connected in series with 0.5MΩ resistor. The time constant of the RC circuit is

(a) 16sec. (b) 6sec (c) 5sec (d) 4sec

Q10 An 8micro-farad capacitor is charged from a 100V supply. The energy stored in the capacitor is

(a) 0.004J (b) 0.0016J (c) 0.008 J (d) None of these

Q11 A conductor carries a current of 100A at right angle to a magnetic field having density of 0.5 T. The force on per unit lengh of the conductor is

(a) 50N (b) 500N (c) 150N (d) 5.0N

Q12 A magnetic flux of 200μwb passing through a coil of 1200 turns is reversed in 0.2sec.The induced emf in the coil is

(a) 12V (b) 2.4V (c) 2.2V (d) 1.2V

Q13 The value of 1/√(μ0 ε0) is equal to

(a) Speed of light (b) 1/ Speed of light (c) (Speed of light )2 (d) None of these

(a) NΦ/I (b) NI/Φ (c) I /ΦN (d) None of these

Q15 A coil of 200 turns is wound on a non-magnetic circular core of area 500mm2& the mean circumference of 400mm.The inductance of coil is

(a) 628H (b) 6.28μH (c ) 62.8μH (d) None of these

Q16 An alternating voltage is given by the equation v = 200Sin 314t the rms value of the voltage is

(a) 141.42V (b) 282.82V (c) 14.142V (d) None of these

Q17 In a transformer the induced emf in the winding is given by (notation used have their usual meaning)

(a) E = 1.11 N f Φm (b) E = 2.22 N f Φm (c) E = 4.44 N f Φm (d) None of these

Q18 A dc motor takes an armature current of 10A at 220V.The armature resistance of the machine is 0.2Ω, flux per pole is .01wb, the no of poles are 6,and the armature has wave wound 480 conductors. The torque developed in armature is

(a) 100Nm (b) 25Nm (c) 44Nm (d) 22.91Nm

Q19 A,3-phase, synchronous generator has 4 pairs of pole is running with the speed of 900 rpm.The frequency of the supply would be

(a) 50Hz (b) 60Hz (c) 25Hz (d) 150Hz

Q20 The advantage of permanent magnet moving coil(PMMC) instrument is

(a)Low power consumption (b) No hysteresis loss (c) Efficient eddy current damping (d) All of the above

Q21 The majority charge carrier in p-type semiconductor are

(a) Electrons (b) Holes (c) Both Electrons and Holes (d) None of these

Q22 An n-type semiconductor as a whole is

(a) Electrically +ve (b) Electrically –ve (c) Electrically neutral (d) None of these

Q23 The out put of the logic gate is one, only when all the inputs are one. Then logic gate is

(a) AND (b) OR (c) NAND (d) NOR

Q24 In a transistor which of the following region is very lightly doped

(a) Emitter (b) Collector (c) Base (d) None of these

Answers

1 c 2

3 a 4 b 5 a 6 d 7 a 8 9 d 10 d 11 a 12 d 13 a 14 a 15 16 a 17 c 18 d 19 b 20 21 b 22 c 23 a 24 c

No. General Knowledge Question Answer

1The first Prime minister of Bangladesh was

Mujibur Rehman

2The longest river in the world is the

Nile

3The longest highway in the world is the

Trans-Canada

4The longest highway in the world has a length of

About 8000 km

5The highest mountain in the world is the

Mount Everest

6The country that accounts for nearly one third of the total teak production of the world is

Myanmar

7The biggest desert in the world is the

Sahara desert

8The largest coffee growing country in the world is

Brazil

9The country also known as "country of copper" is

Zambia

10 The name given to the border Durand line

which separates Pakistan and Afghanistan is

11The river Volga flows out into the

Caspian sea

12The coldest place on the earth is

Verkoyansk in Siberia

13The country which ranks second in terms of land area is

Canada

14The largest Island in the Mediterranean sea is

Sicily

15The river Jordan flows out into the

Dead sea

16The biggest delta in the world is the

Ganges Delta

17The capital city that stands on the river Danube is

Belgrade

18The Japanese call their country as

Nippon

19The length of the English channel is

564 kilometres

20The world's oldest known city is

Damascus

21The city which is also known as the City of Canals is

Venice

22The country in which river Wangchu flows is

Myanmar

23The biggest island of the world is

Greenland

24The city which is the biggest centre for manufacture of automobiles in the world is

Detroit, USA

25The country which is the largest producer of manganese in the world is

China & South Africa

26The country which is the largest producer of rubber in the world is

Malaysia

27The country which is the largest producer of tin in the world is

China

28The river which carries maximum quantity of water into the sea is the

Amazon River

29The city which was once called the `Forbidden City' was

Peking

30 The country called the Land of Japan

Rising Sun is

31 Mount Everest was named afterSir George Everest

32The volcano Vesuvius is located in

Italy

33The country known as the Sugar Bowl of the world is

Cuba

34 The length of the Suez Canal is162.5 kilometers

35 The lowest point on earth isThe coastal area of Dead sea

36The Gurkhas are the original inhabitants of

Nepal

37The largest ocean of the world is the

Pacific ocean

38The largest bell in the world is the

Tsar Kolkol at Kremlin, Moscow

39The biggest stadium in the world is the

Strahov Stadium, Prague

40The world's largest diamond producing country is

South Africa

41Australia was discovered by

James Cook

42The first Governor General of Pakistan is

Mohammed Ali Jinnah

43Dublin is situated at the mouth of river

Liffey

44The earlier name of New York city was

New Amsterdam

45The Eiffel tower was built by

Alexander Eiffel

46The Red Cross was founded by

Jean Henri Durant

47The country which has the greatest population density is

Monaco

48The national flower of Britain is

Rose

49Niagara Falls was discovered by

Louis Hennepin

50The national flower of Italy is

Lily

51 The national flower of Narcissus

China is

52The permanent secretariat of the SAARC is located at

Kathmandu

53The gateway to the Gulf of Iran is

Strait of Hormuz

54The first Industrial Revolution took place in

England

55World Environment Day is observed on

5th June

56The first Republican President of America was

Abraham Lincoln

57The country famous for Samba dance is

Brazil

58The name of Alexander's horse was

Beucephalus

59Singapore was founded by

Sir Thomas Stamford Raffles

60The famous British one-eyed Admiral was

Nelson

61The earlier name of Sri Lanka was

Ceylon

62The UNO was formed in the year

1945

63 UNO stands forUnited Nations Organization

64The independence day of South Korea is celebrated on

15th August

65'Last Judgement' was the first painting of an Italian painter named

Michelangelo

66Paradise Regained was written by

John Milton

67The first President of Egypt was

Mohammed Nequib

68The first man to reach North Pole was

Rear Admiral Robert E. Peary

69The most famous painting of Pablo Picasso was

Guermica

70The primary producer of newsprint in the world is

Canada

71 The first explorer to reach the South Pole

Cap. Ronald Amundson

was

72The person who is called the father of modern Italy is

G.Garibaldi

73World literacy day is celebrated on

8th September

74The founder of modern Germany is

Bismarck

75The country known as the land of the midnight sun is

Norway

76The place known as the Roof of the world is

Tibet

77The founder of the Chinese Republic was

San Yat Sen

78The first Pakistani to receive the Nobel Prize was

Abdul Salam

79The first woman Prime Minister of Britain was

Margaret Thatcher

80The first Secretary General of the UNO was

Trygve Lie

81The sculptor of the statue of Liberty was

Frederick Auguste Bartholdi

82The port of Baku is situated in

Azerbaijan

83John F Kennedy was assassinated by

Lee Harvey Oswald

84The largest river in France is

Loire

85The Queen of England who married her brother-in-law was

Catherine of Aragon

86The first black person to be awarded the Nobel Peace Prize was

Ralph Johnson Bunche

87

The first British University to admit women for degree courses was

London University

88The principal export of Jamaica is

Sugar

89New York is popularly known as the city of

Skyscrapers

90Madagascar is popularly known as the Island of

Cloves

91The country known as the Land of White Elephant is

Thailand

92The country known as the Land of Morning Calm is

Korea

93The country known as the Land of Thunderbolts is

Bhutan

94The highest waterfalls in the world is the

Salto Angel Falls, Venezuela

95The largest library in the world is the

United States Library of Congress, Washington DC

96The author of Harry Potter Books is

JK Rowling

97Nickname of New York city is

Big Apple

98What do you call a group of sheep?

A Flock of Sheep

99In which sport do players take long and short corners?

Hockey

100Who was the youngest President of the USA?

Theodore Roosevelt

101How many legs do butterflies have?

6 Legs & 2 Pair of Wings

102Who invented the Nintendo Wii?

Kashi Kabushiki

103What year does the Nintendo Wii come out?

Late 2006

104Who invented the Light Bulb?

Humphry Davy

105Who invented the washing machine?

James King

106Who invented the first electric washing machine?

Alva Fisher

107Who invented the safety pin?

Walter Hunt

108Who invented the Vacuum Cleaner?

Hubert Booth

109Who won the Football World Cup in 2006?

Italy

110 Which country hosted the Football World Cup

Germany

in 2006?

110Who is the new Prime Minister of the United Kingdom?

David Cameron

111Who won Men's Singles title in French Open 2010?

Rafael Nadal (Spain)

112Who won Women's Singles title in French Open 2010?

Francesca Schiavone (Italy)

113Who won Men's Doubles title in French Open 2010?

Daniel Nestor (Canada) & Nenad Zimonjic (Serbia)

114Who won Women's Doubles title in French Open 2010?

Serena & Venus Williams (USA)

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Question Papers on Instruments and MeasurementInstruments and Measurement

(1) Instrument is a device for determining(a) the magnitude of a quantity(b) the physics of a variable(c) either of the above(d) both (a) and (b)

(2) Electronic instruments are preferred because they have(a) no indicating part(b) low resistance in parallel circuit(c) very fast response(d) high resistance in series circuit(e) no passive elements.

(3) A DC wattmeter essentially consist of(a) two ammeters(b) two voltmeters(c) a voltmeter and an ammeter(d) a current and potential transformer

(4) Decibel is a unit of(a) power(b) impedance(c) frequency(d) power ratio

(5) A dc voltmeter may be used directly to measure(a) frequency(b) polarity(c) power factor(d)power

(6) An accurate voltmeter must have an internal impedance of(a) very low value(b) low value(c) medium value(d) very high value

(7) The insulation resistance of a transformer winding can be easily measured with(a) Wheatstone bridge(b) megger(c) Kelvin bridge(d) voltmeter

(8) A 100 V voltmeter has full-scale accuracy of 5%. At its reading of 50 V it will give an error of(a) 10%(b) 5%(c) 2.5%(d) 1.25%

(9) You are required to check the p. f. of an electric load. No p.f. meter is available. You would use:(a) a wattmeter(b) a ammeter, a voltmeter and a wattmeter(c) a voltmeter and a ammeter(d) a kWh meter

(10) The resistance of a field coil may be correctly measured by using(a) a voltmeter and an ammeter(b) Schering bridge(c) a Kelvin double bridge(d) a Maxwell bridge

(11) An analog instrument has output(a) Pulsating in nature(b) Sinusoidal in nature(c) Which is continuous function of time and bears a constant relation to its input(d) Independent of the input quantity

(12) Basic charge measuring instrument is(a) Duddel's oscillograph(b) Cathode ray oscillograph(c) Vibration Galvanometer(d) Bailastic Galvanometer(e) Battery Charging equipment

(13) A.C. voltage can be measured (using a d.c. instrument) as a value obtained(a) by subtracting the d.c. reading from it's a.c. reading.(b) Using the output function of the multimeter(c) By using a suitable inductor in series with it(d) By using a parallel capacitor with it(e) None of the above

(14) A moving coil permanent magnet ammeter can be used to measure(a) D. C. current only(b) A. C. current only(c) A. C. and D. C. currents

(d) voltage by incorporating a shunt resistance(e) none of these

(15) Select the wrong statement(a) the internal resistance of the voltmeter must be high(b) the internal resistance of ammeter must be low(c) the poor overload capacity is the main disadvantage of hot wires instrument(d) the check continuity with multimeter, the highest range should be used.

(e) In moving iron voltmeter, frequency compensation is achieved by connecting a capacitor across its fixed coil.(16) Which of the following instrument is suitable for measuring both a.c. and d.c.quantities.(a) permanent magnet moving coil ammeter.(b) Induction type ammeter.(c) Quadrant electrometer.(d) Moving iron repulsion type ammeter.

(e) Moving iron attraction type voltmeter.(17) Swamping resistance is used in moving coil instruments to reduce error due to

(a) thermal EMF(b) temperature(c) power taken by the instrument(d) galvanometer sensitivity.

(18) A power factor meter is based on the principle of(a) electrostatic instrumentb) Electrodynamometer instrument(c) Electro thermo type instrument(d) Rectifier type instrument.

(19) A potentiometer recorder is used for(a) AC singles(b) DC signals(c) both (a) and (b)(d) time varying signals(e) none of these.

(20) Transformers used in conjunction with measuring instruments for measuring purposes are called(a) Measuring transformers(b) transformer meters(c) power transformers(d) instrument transformers(e) pulse transformers.

(21) Leakage flux in an electrical machine is measure by(a) Ballistic galvanometer(b) Flux meter(c) Either (a) or (b)(d) Vibration galvanometer(e) CRO

(22) A C.R.O. is used to indicate

(a) supply waveform(b) magnitude of the applied voltage(c) B.H. loop(d) all of these(e) Magnitude of the current flowing in it.

(23) An oscillator is a(a) an amplifier having feedback network(b) a high gain amplifier(c) a wide band amplifier(d) a untuned amplifier(e) None of these

(24) Distortion can be measured by(a) Wave meter(b) Digital filters(c) Wein bridge circuit(d) Bridge T filter circuit

(25) Series connected Q- meter is preferable for measurement of components having(a) high impedance(b) low impedance(c) both (a) and (b)(d) high frequency(e) low capacitance

(26) A potentiometer is(a) an active transducer(b) a passive transducer(c) a secondary transducer(d) a digital transducer(e) a current sensing transducer

(27) The basic components of a digital voltmeter are:(a) A/D converter and a counter(b) A/D converted and a rectifier(c) D/A converter and a counter(d) Ramp generator and counter(e) Comparator

(28) Which of the following electrical equipment cannot convert ac into dc(a) diode(b) converter(c) transformer(d) mercury arc rectifier

(29) Voltage measurement are often taken by using either a voltmeter or(a) an ammeter(b) an ohmmeter(c) an oscillator(d) a watt-meter

(30)The electric device which blocks DC but allows AC is called:(a) capacitance(b) inductor(c) an oscilloscope(d) a watt-meter

(31 ) The range of an ammeter can be extended by using a(a) shunt in series

(b) shunt in parallel(c) multiplier in series(d) multiplier in parallel

(32)A device that changes one form of energy to another is called(a) rheostat(b) oscillator(c) transducer(d) varicap

(33) Aquadag is used in CRO to collect(a) primary electron(b) secondary electron(c) both primary and secondary(d) none of above

(34) A vertical amplifier for CRO can be designed for(a) only a high gain(b) only a broad bandwidth(c) a constant gain time bandwidth product(d)all of the above

(35) One of the following is active transducer(a) Strain gauge(b) Selsyn(c) Photovoltic cell(d) Photo emissive cell

(36) The dynamic characteristics of capacitive transducer are similar to those of(a) low pass filter(b) high pass filter(c) band pass filter(d) band stop filter

(37) Thermocouples are(a) passive transducers(b) active transducers(c) both active and passive transducers(d) output transducers

(38) The size of air cored transducers as compare to iron core counter part are(a) bigger(b) smaller(c) same

(39) From the point of view of safety, the resistance of earthing electrode should be:(a) low(b) high(c) medium(d) the value of resistance of electrode does not effect the safety

(40) In CRT the focusing anode is located(a) between pre accelerating and accelerating anodes(b) after accelerating anodes(c) before pre accelerating anodes(d) none of above

(41) Which transducer converts heat energy into electrical energy

(a) I. V. D. T.(b) thermocouple(c) photoconductor(d) none of the above

(42) Which of photoelectric transducer is used for production of electric energy by converting solar energy(a) photo emission cell(b) photo diode(c) photo transistor(d) both (b) and (c)

(43) Which of the following instruments consumes maximum power during measurement?(a) induction instruments(b) hot wire instruments(c) thermocouple instruments

(d) electrodynamometer instruments(44) Which of the following meters has the best accurancy(a) moving iron meter(b) moving coil meter(c) rectifier type meter(d) thermocouple meter

(45) The function of the safety resistor in ohm meter is to(a) limit the current in the coil(b) increase the voltage drop across the coil(c) increase the current in the coil(d) protect the battery

(46) Which of the following instruments is free from hysteresis and eddy current losses?(a) M.l. instrument(b) electrostatic instrument(c) electrodynamometer type instrument(d)all of these

(47) The dielectric loss of a capacitance can be measured by(a) Wien bridge(b) Owen bridge(c) Schering bridge(d) Maxwell bridge

(48) Reed frequency meter is essentially a(a) recording system(b) deflection measuring system(c) vibration measuring system(d) oscillatory measuring system

(49) In measurements made using a Q meter, high impedance elements should preferably be connected in(a) star(b) delta(c) series(d) parallel

(50) A digital voltmeter measures(a) peak value(b) peak-to-peak value

(c) rms value(d) average value

Question Bank on Electrical, Electronics Instrumentation

Question Bank on Electrical, Electronics Instrumentation

1. In order for a 30 volt, 90 watt lamp to work properly in a 120 volt supply the required series resister in ohm is

(A) 10 (B) 20 (C) 30 (D) 40

2. According to Theremin’s theorem, any linear active network can be replaced by a single voltage source

(A) in series with a single impedance (B) in parallel with a single impedance (C) in series with two impedances (D) in parallel with two impedances

3. The internal resistance of ammeter is

(A) very small (B) very high (C) infinite (D) zero

4. Hay bridge is used mainly for the measurement of

(A) resistance (B) inductance (C) conductance (D) capacitance

5. Which of the following is true about series resonance

(A) The reactance becomes zero and impedance becomes equal to resistance (B) The current in the circuit becomes maximum (C) The voltage drop across inductance and capacitance cancels each other (D) All of the above statements are correct

6. A 3-Ф, 4 wire, 400/230 v feeder supplies 3-phase motor and an unbalanced lighting load. In this system

(A) all four wires will carry equal current (B) neutral wire will carry no current (C) neutral wire will carry both motor current and lighting load current (D) neutral wire will carry current only when lighting load is switched on

7. Equalizing connections are required when paralleling two

(A) alternators (B) compound generators (C) series generators (D) both (B) and (C)

8. An ideal transformer is one which

(A) has a common core for its primary and secondary windings (B) has no losses and magnetic leakage (C) has core of stainless steel and windings of pure copper metal (D) has interleaved primary and secondary windings

9. The principle of operation of a 3-phase induction motor is most similar to that of a

(A) synchronous motor (B) repulsion-start induction motor (C) transformer with a shorted secondary (D) capacitor-start, induction-run motor

10. In the forward region of its characteristic, a diode appears as

(A) an OFF switch (B) a high resistance (C) a capacitor (D) an ON switch

11. The common-emitter forward amplification factor βdc is given by

(A) IC/IE (B) IC/Ib (C) IE/IC (D) IB/IF

12. A common emitter amplifier is characterized by

(A) low voltage gain (B) moderate power gain (C) signal phase reversal (D) very high output impedance

13. After VDS reaches pinch-off value VP in a JFET, drain current IO becomes

(A) zero (B) low (C) saturated (D) reversed

14. An electronic oscillator

(A) needs an external input (B) provides its own input (C) is nothing but an amplifier (D) is just a dc/ac converter

15. In an SCR, the function of the gate is to

(A) switch it off (B) control its firing (C) make it unidirectional (D) reduce forward breakdown voltage

16. NAND and NOR gates are called ‘universal’ gates primarily because they

(A) are available everywhere (B) are widely used in IC packages (C) can be combined to produce AND, OR and NOT gates (D) are the easiest to manufacture

17. Registers and counters are similar in the sense that they both

(A) count pulses (B) store binary information (C) are made from an array of flip-flops and gates integrated on a single chip (D) are in fact shift register

18. A flip-flop

(A) is a sequential logic device (B) is a combinational logic device (C) remembers what was previously stored in it (D) both (A) and (C)

19. An operational amplifier

(A) can be used to sum two or more signals (B) can be used to subtract two or more signals (C) uses to principle of feed back (D) all of the above

20. TTL logic is preferred to DRL logic because

(A) greater fan-out is possible (B) greater logic levels are possible (C) greater fan-in is possible (D) less power consumption is possible

An electron rising through a potential of 250 V will acquire an energy of :(A) 250 eV(B) 800 eV(C) 250 J(D) 800 J

If the amount of impurity, either donor type or acceptor type added to the intrinsicsemiconductor is controlled to 1 part in one million, the conductivity of the sample :(A) increases by a factor 103(B) reduces by a factor 10−3(C) increases by a factor 106(D) reduces by a factor 10−6

4. Laplace transform and Fourier integrals are related through :(A) frequency domain(B) time domain(C) both frequency and time domain(D) none

A clamper circuit :(i) adds or subtracts a dc voltage to or from a waveform(ii) does not change the shape of the waveform(iii) amplifies the waveform(A) (i) and (ii) are correct(B) (i) and (iii) are correct(C) (ii) and (iii) are correct(D) (i), (ii) and (iii) are correct

A ring counter consisting of five flip flop will have :(A) 5 states(B) 10 states(C) 32 states(D) infinite states

Which one of the following can be used as parallel to series converter ?(A) Decoder(B) Encoder(C) Digital counter(D) Multiplexer

An interrupt in which the external device supplies its address as well as the interruptrequest, is known as :(A) vectored interrupt(B) maskable interrupt(C) polled interrupt(D) non-maskable interrupt

An instruction that can be recognized and used without translation must be writtenin :(A) Source code(B) Machine code(C) Basic language(D) Assembly code

The angle for which there is no reflection and the incident wave is vertically polarizedis known as :(A) Steradian angle(B) Reflection angle(C) Brewster’s angle(D) Critical angle

A PLL can be used to demodulate :(A) PAM signals(B) PCM signals(C) PM signals(D) DSB-SC signals

The main function of balanced modulator is to :(A) produce balanced modulation of a carrier wave(B) produce 100 percent modulation(C) suppress carrier signal in order to create a single side band or double side band(D) limit noise picked up a receiver

An SCR can be termed as :(A) DC switch(B) AC switch(C) Both DC and AC switch(D) Square wave switch

Fiber optics communication offers the largest bandwidth in the range of :(A) 1010 Hz(B) 106 Hz(C) 1014 Hz(D) 1020 Hz

Silicon photosensors have their maximum spectral response in the :(A) infrared region(B) ultraviolet region(C) visible region(D) X-ray region

Question Bank on Control Systems1. An open loop control system has its(a) control action independent of the output or desired quantity(b) controlling action, depending upon human judgment(c) internal system changes automatically taken care of(d) both (a) and (b)(e) all (a),(b) and (c)

2. A servo system must have(a) feedback system(b) power amplifier to amplify error(c) capacity to control position or its derivative(d) all of these(e) none of these

3. The major disadvantage of a feedback system may be(a) Inaccuracy(b) inefficiency(c) Unreliability(d) instability(e) Insensitivity

4. Properties of a transfer function(a) It is ratio of two polynomials is S and assumes zero initial conditions(b) It depends on system elements and not input and output of the system(c) Coefficients of the powers of S in denominator

and numerator are all real constant. The order of denominator is usually greater than or equal to the order of numerator(d) All of these(e) It is a function which transfer one physical system into another physical system.

5. The classical analogous of a simple lever is(a) Capacitor bridge(b) transformer(c) mutual inductor(d) either of these

6. Two blocks G1(s) and G2(s) can be cascaded to get resultant transfer function as(a) G1(s) + G2(s)(b) G1(s) / G2(s)(c) G1(s) G2(s)(d) 1+G1(s) G2(s)(e) 1-G1(s)G2(s)(f) two blocks cannot be cascaded

7. The principles of homogeneity and super position can be applied to(a) linear time invariant system(b) non-linear time invariant system(c) digital control system(d) both (a) and (b)

8. Pick up the nonlinear system(a) automatic voltage regulator(b) d.c. servomotor with high field excitation(c) temperature control of a furnaces using thermistor(d) speed control using SCR(e) all of these

9. Signal flow graph (SFG) is a(a) polar graph(b) semi log graph(c) log log graph(d) a special type of graph for analyzing modem control system(e) a topological representation of a set of differential equations

10. Disadvantages of magnetic amplifier(a) time lag, less flexible, non-sinusoidal waveform(b) low power consumption and isolation of the active circuit(c) saturation of the core(d) all of these

11. Pick up false statement regarding magnetic amplifiers(a) The gate coil of an ideal magnetic amplifier has either zero or infinite inductance(b) Resistance of control and gate winding is very small(c) Magnetic amplifier gas dropping load characteristics(d) Magnetic amplifiers are not used to control the speed of d.c. shunt motor(e) Magnetic amplifiers can be used in automatic control of electric drivers of higher rating.

12. High power amplification is achieved by using(a) push pull amplifier(b) amplidyne(c) magnetic amplifier(d) DC amplifier(e) D.C. generator

13. Pick up false statement regarding servomotors(a) The d.c. servomotors are lighter than equivalent a.c. servomotors(b) The d.c. servomotors develops higher starting and reversing torque than equivalent a.c. servomotor.(c) A drag cup a.c. servomotor has one windings on stator and other on rotor(d) Output power of servomotors varies from 1/20 W to 100 W

14. To reduce steady state error(a) decrease natural frequency(b) decrease damping(c) increase damped frequency(d) increase time constant(f) increase gain constant of the system

15. A good factor for Mp should be(a) less than 1(b) lying between 1.1 and 1.5(c) more than 2.2(d) zero(e) infinity

16. Pick up false statement. Routh-Hurwitz criterion(a) is used for determining stability of a system(b) is an algebraic procedure(c) gives the exact location of roots of the characteristic equation(d) does not indicate relative degree of stability or instability

17. Which of the following is the time domain method of determining stability of a control system(a) Bode plot(b) Nyquist plot(c) Nicholos chart(d) Routh-Hurwitz array(e) Constant M and (fy) locus(f) Root locus technique

18. The technique which gives transient response quickly as well as stability information is(a) Nyquist plot(b) Routh-Hurwitz criteria(c) Bode plot(d) Root locus plot(e) Nichols plot

19. The bandwidth can be increased by use of(a) phase lag network(b) phase lead network(c) both (a) and (b) in cascade(d) both (a) and (b) in parallel(e) none of these

20. Nyquist plot is drawn on(a) semi log graph paper(b) log log graph paper(c) polar graph paper(d) centimeter graph paper

21. If the gain margin is positive and the phase margin is negative the system is

(a) stable

(b) unstable

(c) indeterminist

22. The Bode plot is applicable to

(a) all phase network

(b) minimum phase network

(c) maximum phase network

(d) lag lead network

(e) none of these

23. The valid relation between setting time ts and rise time tr is

(a) tr>ts

(b) ts>tr

(c) ts=tr

(d) none of these

24. As a root moves further away from imaginary axis the stability

(a) increases

(b) decreases

(c) not affected

(d) none of these

25. Flat frequency response means that the magnitude ratio of output to input over the bandwidth is

(a) variable

(b) zero

(c) constant

(d) none of above

26. How many octaves are between 200 Hz and 800 Hz

(a) Two octave

(b) One octave

(c) Four octave

(d) None of above

27. Human system can be considered as

(a) open loop system

(b) close loop system with single feedback

(c) close loop system with multivariable feedback

(d) none of these

28. In a feedback system the transient response

(a) Decays at constant rate

(b) gets magnified

(c) decays slowly

(d) decays more quickly

29. Transfer function of a system is used to calculate

(a) the steady state gain

(b) the main constant

(c) the order of system

(d) the output for any given input

(e) all of the above

30. Transfer function of a system is defined as the ratio of output to input in

(a) Laplace transform

(b) Z-transform

(c) Fourier transform

(d) Simple algebraic form

31. Introduction of feedback decreases the effect of

(a) disturbances

(b) noise signals

(c) error signals

(d) all the above

32. The system response of a system can be best tested with

(a) unit impulse input signal

(b) ramp input signal

(c) sinusoidal input signal

(d) exponentially decaying input signal

33. Which of the following is a closed loop system

(a) electric switch

(b) car starter

(c) de generator

(d) auto-pilot for an aircraft

34. Which of the following is used as an error detector

(a) potentiometer

(b) field controlled ac motor

(c) amplidyne

(d) armature controlled ac motor

35. The break away point of root loci are

(a) open loop poles

(b) closed loop poles

(c) open loop zeros

(d) closed loop zeros

36. Noise in a control system can be kept low by

(a) reducing the bandwidth

(b) attenuating such frequencies at which external signals get coupled into the system

(c) both (a) and (b)

(d) none of these

37. Main cause of absolute instability in the control system is

(a) parameters of controlling system

(b) parameters of controlled system

(c) parameters of feedback system

(d) error detector where the two signals are compared

38. Basically a controller is

(a) a amplifier

(b) a clipper

(c) a comparator

(d) a summer

39. A system with gain margin close to unity or a phase margin close to zero is

(a) highly stable

(b) highly oscillatory

(c) relatively stable

(d) none of these

40. Which of following elements is not used in an automatic control system

(a) sensor

(b) error detector

(c) oscillator

(d) final control element

41. AC systems are usually preferred to the DC systems in control applications because

(a) AC systems are cheaper

(b) AC systems are more stable

(c) AC systems have better performance characteristics and smaller in size

(d) all of these

42. A system has the transfer function (1-s)/(1+s); It is known as

(a) low pass system

(b) high pass system

(c) all pass system

(d) none of the above

43. In control systems, excessive bandwidth should be avoided because

(a) noise is proportional to bandwidth

(b) it leads to low relative stability

(c) it leads to slow speed of response

(d) none of these

44. In most systems, an increase in gain leads to

(a) larger damping ratio

(b) smaller damping ratio

(c) constant damping ratio

(d) none of these

45. A step function is applied to the input of a system and output is of the form y = t, the system is

(a) stable

(b) unstable

(c) not necessarily stable

(d) conditionally stable

46. Which of the following can be magnified by magnetic amplifier

(a) voltage

(b) current

(c) power

(d) none of above

47. The inductance is not used in lag network because of

(a) big size

(b) time delay and hysteresis losses

(c) high reactance

(d) none of these

48. Saturation in a stable control system can cause

(a) conditional stability

(b) over damping

(c) low level oscillations

(d) high level oscillations

49. Excessive noise in control systems can cause

(a) reduction in bandwidth

(b) reduction in gain

(c) saturation in amplifying stages

(d) oscillations

50. The type-0 system has

(a) net pole at the origin

(b) no pole at the origin

(c) simple at one origin

(d) two poles at the origin

No. General Knowledge Question Answer

1.Which strait separates the North and South islands of New Zealand?

Cook Strait

2.In which city is the Doge’s Palace?

Venice

3.Who plays Johnny Depp’s uncle in the 1993 flm Arizona Dream?

Jim Carrey

4.Which New Zealand golfer won the 2000 Australian Masters in Melbourne?

Michael Campbell

5.Which continent has the larger land mass: Africa or North America?

Africa

6.Aston, Aston, Rizzo, Stevenson, Gilvear: which 1980s group?

Gene Loves Jezebel

7.

What name is given to the art of preparing, stuffng and mounting the skins of animals to make lifelike models?

Taxidermy

8.Which artist was appointed court painter to Charles IV of Spain in 1786?

Goya

9.The name of which Roman god means ‘shining father' in Latin?

Jupiter

10.What is the name of the dog in Punch and Judy shows?

Toby

11.What was the name of the Addams Family butler?

Lurch

12.Who directed the 1995 flm Heat, which starred Al Pacino?

Michael Mann

13.Which theoretical temperature corresponds to minus 273.15 degrees on the Celsius scale?

Absolute zero

14.Which seven-a-side ball game is played in a swimming pool?

Water polo

15.Which Roman Catholic organization takes its name from the Latin for ‘God's work’?

Opus Dei

16.Bamboozled is a flm by which controversial US director?

Spike Lee

17.

Which word meaning ‘rebirth’ describes the period in European history which began in the 14th century?

Renaissance

18.Who starred opposite Pierce Brosnan in the remake of The Thomas Crown Affair?

Rene Russo

19.Of which French overseas region in South America is Cayenne the capital?

French Guiana

20.

In which year did David Koresh and the Branch Davidians Christian cult hold a siege in Waco, Texas?

1993

21. Who wrote Bleak House?Charles Dickens

22.Which actor’s real name was Marion Michael Morrison?

John Wayne

23.What would a costermonger sell?

Fruits & Vegetables

24.Which actress played the title role in the flm adaptation of Bridget Jones’s Diary?

Renee Zellweger

25.‘George’ is an informal name for which feature of an aircraft?

Automatic Pilot

26.Who wrote The Loneliness of the Long Distance Runner?

Alan Sillitoe

27.How is Sarah Michelle Gellar better known to millions?

Buffy

28.Ganymede is a satellite of which planet?

Jupiter

29.What nationality was the composer Wolfgang Amadeus Mozart?

Austrian

30.For which element is Co the chemical symbol?

Cobalt

31.The German port of Hamburg lies near the mouth of which major European river?

Elbe

32.In Arctic regions, what kind of features are sastrugi?

Wind-formed patterns in ice and snow

33.In the Americas, what is a mesa?

Flat-topped mountain

34. Which city was the frst in the world to have a population of

London (circa 1811)

more than one million?

35.The Taj Mahal is located near to which Indian city?

5 Agra

36.St Michael’s Mount lies off the coast of which English county?

Cornwall

37.To where would you have to travel in order to stand by the Marsh of Decay?

Moon

38.What is the English name for the Bayern region of Germany?

Bavaria

39.In Lord of the Rings, what was the name of Gandalf’s white horse?

Shadowfax

40.Which famous Nazi-hunter died in Vienna in 2005, aged 96?

Simon Wiesenthal

41.The 1956 film 'Reach for the Sky' is based on whose life story?

Douglas Bader

42.Who voiced Stinky Pete in the flm 'Toy Story 2'?

Kelsey Grammer

43.How many times did Bobby Jones win the US Amateur Championship in golf?

Five

44.In which sport is the 'Conn Smythe Trophy' awarded?

Ice hockey

45.Which female singer recorded the 2001 album Read My Lips?

Sophie Ellis Bextor

46.

Which singer recorded the 2000 album 'Holy Wood' (In the Shadow of the Valley of Death)?

Marilyn Manson

47.Which was the frst element to be created artifcially?

Technetium

48.In which European capital city is the Institut Pasteur based?

Paris

49.Which condition does the acronym AIDS stand for?

Acquired Immune Defciency Syndrome

50.In computing, what does ISDN stand for?

Integrated Services Digital Network