1. Aero derivative turbine do not have

A. Stator B. Compressor C. Fuel Intake System D. Fans

Answer: D 2. Transmission line voltages are considered to be ____ kv and above

A. 110 KV B. 130 KV C. 140 KV D. 150 KV

Answer: A 3. Lower voltages such as 33kv and 66kv considered to be____

A. Distribution Voltages B. Sub transmission voltages

Answer: B 4. Transformer is designed to have __ leakage induction

A. zero B. low C. high D. medium Answer: B

5. Fault caused by lightning and storm damage in power system called ___ Answer: line to ground fault

6. Which of the following is used as a moderator in Nuclear power systems

A. Graphite

B. Boron

C. Calcium

D. Plutonium

Answer: A

7. The effect of capacitance on the line regulation is neglected because the capacitance of short lines transmitting at relative low voltage (upto 20 kv) are negligible. But as the voltage and length of the transmission line increase, the capacitance gradually becomes of greater importance. In the case of lines with voltages up to 100 kv and 150 km in length, satisfactorily solution can be obtained by the so-called T-method and 𝜋-or pi method as described below. Answer: Assuming that total capacitance of the line is located at receiving end alone, determine the sending-end voltage, the sending-end current end regulation. https://books.google.com.pk/books?id=1lR701DFtaMC&pg=PA1629

8. In case the height of transmission tower is increased a. the line capacitance and inductance will not change b. the line capacitance will decrease but line inductance will decrease c. the line capacitance will decrease and line inductance will increase d. the line capacitance will decrease but line inductance will remain unaltered. Answer: D

9. For transmitting power on a 20-25 km line which voltage should be used

A. 5kv

B. 11kv

C. 33kv

Answer: B

10. How to increase power transfer by 25% using the same conductor material

Double the voltage

11. A _____ induced current in with mechanical motion of conductor

generator

12. 1000 million tons coal is required to generate 1000 MW for a year, for uranium this fuel amount

to

A. 10-15

B. 20-25

C. 30-35

D. 40-45

Answer: C

13. E= Ndphi/dt is called

A. Lenz’s law

B. Farady law

Answer: B

14. In real power system constant used a+jb, j is called

√−1 15. Capacity factor =0.628, maximum demand is 325 MW, plant capacity is 350 MW, calculate load

factor, Average load = 250 MW

0.67

16. Adopting quick response excitation systems and using series capacitors to make x=(3r)^1/2 to

improve

Steady state stability

17. ______ detects faults in power system

Relay

18. Voltage standing wave ratio is given by

Maximum voltage/minimum voltage

19. The elementary dc and ac generators are essentially built the same way. In each case, a coil

rotates between the poles of a magnet and an ac voltage is induced in the coil. The machines

only differ in the way the coils are connected to the external circuit. Which of the following

statement is then correct?

A. The ac generators carry slip rings while dc generators require a commutator

B. The dc generators carry slip rings while ac generators require a commutator

C. Both ac and dc generators carry slip rings

D. Both ac and dc generators require a commutator

E. The ac generators carry slips while dc generators require diode rectifiers to produce ac

output

Answer: A

20. In shunt generator, the shunt winding is parallel with the armature its advantage is

A. Single source is used to excite both

B.

C. No need for external excitation

Answer: C

21. In induction motor when the length of the air gap is increased, the magnetizing current of the

motor increases while the short circuit current

Remains same

http://www.electrical4u.com/mcqs-on-electric-motor-generator-6/

22. On low head turbines

A. Less Volume and low pressure

B. Less volume and high pressure

C. High Volume low Pressure

D. High Volume High Pressure

Answer: C

23. In air blast circuit breakers, the pressure of air is

20-30 kg/cm2

24. If large load is disconnected suddenly from power plant, then what happens to generators

Increase of simultaneously the speed and frequency

25. A loss of load occurs when system load exceeds the available generating capacity. The overall

probability that there will be a shortage of power is called _____

Answer: load loss probability

https://books.google.com.pk/books?id=Xxj-CjnpnNoC&pg=PA21

26. Real power is ______

27. Impedance through which negative sequence current flow in known as

Negative phase sequence

28. In dc generator eddy current is proportional to

Square of thickness of lamination

29. In synchronous motor field and rotor moves with same speed

30. An induction motor rotates due to

Stator rotating magnetic field

31. The fault is ________

A. Symmetric

B. Asymmetric

C. Skewed

D. Lopified

Answer: A

32. Delta connection have impedance at receiving and sending end

33. Permeability is the ratio ……. in material/vacuum

34. Plasma frequency of copper

A. 2.6 x 10^15

B. 2.6 x 10^12

C. 2.6 x 10^6

D. 2.6 x 10^3

E. 2.6 x 10

Answer: A

35. Preferring a _____ consists of using ohms law to take an existing voltage source in series with a

resistance and replace it with a current source in parallel with the same resistance

A. Voltage transformation

B. Current transformation

C. Source transformation

D. Resistance transformation

Answer: C

36. The quantity “Rm” which relates dependent voltage to controlling current is called _____

A. Trans conductance

B. Maximum resistance

C. Transresistance

D. Limiting resistance

Answer: C

37. Current carrying conductor Electromagnetic or Lorentz force

A. Parallel

B. Perpendicular

C. 45 degree angle

D. 135 degree angle

Answer: B

38. In yz plane electric field is

Along x axis

39. Dq/dt is called

current

40. Phaser is described by

Amplitude and phase angle

41. Inductances in parallel 10,10.5,20,20.5

3.4 mH

42. Inductances in series 10,10.5,20,20.5

60mH

43. R=2, L=1, C=1 system is

A. Damped

B. Underdamped

C. Critical

D. Overdamped

Answer: C

44. For undamped system, R=1, L=2, C=2, the value of frequency

A. 0.1

B. 0.5

C. 1.0

D. 1.5

E. 2.0

Answer: B

45. Electrical field uniform charge density (on sphere

A. X>R

B. X<R

C. X=R

D. None

Answer: B

46. Potential difference is

Work done in moving a charge

47. When a displacement is divided into small displacements and summing them is equal to

Equal to vector sum of all displacements

48. In Kirchoff law the all current enter or leaving a node is equal to

zero

49. In addition to KCL superposition theorem yields

Current and voltage sources

50. Superposition theorem is used to solve ______ network

A. Thevenin

B. Norton

C. Norton and Thevenin

D. Newton

Answer: C

51. In superposition all voltages sources are replaced by

Answer: short circuit

52. For the surface where surface charge density is zero, the normal component of ___ is continuous Answer: electrical flux density

53. Impedance of series resonance circuit given by the relation

𝑍 = √(𝑅2 + (𝑋𝑙 − 𝑋𝑐)2)

54. Oscilloscope is ___ measuring Answer: voltage

55. Diac is a two terminal___ layer device A. One B. Two C. Three D. Four

Answer: D 56. CRO vertical volt/division and horizontal _____

time/division 57. Instrument for measuring ocular focus or refraction of eyes ____

A. Drummeter B. Durameter C. Ellipsigraphy D. Diptometer E. Electroretinography Answer: D

58. For input function of 2 boolean variables there are ______ boolean algebra functions. A. 12 B. 8 C. 16 D. 4

Answer: C 59. Clamping circuits add __ level equal to +ive -ive peak value to ac signal

Answer: DC 60. Rectifier employ operation amplifier for eliminate diode voltage

A. Passive circuit B. Active circuit C. Saturation circuit D. Non-saturation circuit

Answer: A 61. Which of the following statements is incorrect?

A. Switching regulators use switching speeds of 20 kHz or more.

B. A great advantage of switching regulators is that their power consumption is very low.

C. Both bipolar transistors and FETs have very good switching characteristics.

D. The output voltage of a switching regulator is controlled by altering the switching

frequency.

Answer: D

62. Vo Output of operation amplifier is given by the relation

63. Figure given for which vo is to be calculated in op-amp

A. 12

B. -12

C. 6

D. -6

E. 0

Answer: D

64. How to turn off thyrister?

Make gate current less than holding current

65. Which of the following is normal operation of n-p-n transistor

A. emitter to base junction is forward biased and collector to base junction reverse biased

B. emitter to base junction is forward biased and collector to base junction forward biased

C. emitter to base junction is reverse biased and collector to base junction reverse biased

D. emitter to base junction is reverse biased and collector to base junction forward biased

Answer: A

66. If first byte of the data is stored at an ____ address , 8086 can read the entire word in one operation. Answer: even address

A. Odd address B. Even address C. 0521H D. Any segment

Answer: B 67. In home automatic wiring, Virtual relay are contact

A. Assembly language

B. Machine language

C. Ladder logic

D. Basic

E. C++

Answer: C

68. First generation computers use

vacuum tubes

69. Program counter

holds the address of the next instruction to execute

70. MCS_51 relates to

8051

71. To move data from Port 0 to register and then from register to port 3 we use the command

72. Fourier transform imposes _____ parity for Fourier cosine Answer: even

73. Conjunction X ^ Y in digital logic means

A. Addition

B. Subtraction

C. Multiplication

D. Division

Answer: C

74. Data storage system

A. Control Mechanism

B. Register

C. Logic gate

D. A and B

Answer: C

75. Inverse of even function A. Even B. Odd C. Linear D. Quadratic E. Does not exist

Answer: E 76. The ideal delay system is defined by the equation

Y[n] = x[n-nd], − ∞ < 𝑛 < ∞

Where nd is a fixed negative integer in the above equation, then the system would

A. Shift the input sequence to the right by nd samples to form the output

B. Shift the input sequence to the left by nd samples to form the output

C. The output of the system remains unchanged for positive or negative values of the nd

D. The system will become unstable and output will remain undefined

Answer: B

https://books.google.com.pk/books?id=geTn5W47KEsC&pg=PA43

77. For multiple video channel digital modulation and ____ diode are necessary

A. Zener

B. Schotky

C. Laser

D. Light emitting

Answer: C

78. Open loop control system input is _____ on output

A. Dependent

B. Independent

Answer: B

79. Time shifting and scaling

A. Time shifting is applied first and then scaling

B. Scaling is applied first and then time shifting

C. Any one can be applied irrespective of order

D. Only one operation can be performed

Answer: A

80. In closed loop control system feedback strategy is

A. input dependent

B. Fail safe

C. error driven

D. both A & B

Answer: C

81. Asymptotic stability of control system is determined by

A. Eigen values

B. Poles and zeros

Answer: A

82. Baseband analog intensity modulation is done by modulating ______ applied to LED.

A. voltage

B. current

C. Frequency

D. Amplitude

Answer: B

83. Two Coherent modes one homodyne and _____

Heterodyne

84. Identify correct statement about FM and AM

Answer: D (Power required is less in FM)

85. Analog to discrete representation

A. Sampling

B. Quantization

Answer: B

86. Pseudo noise sequence, the autocorrelation

A. Random atmospheric generator

B. White noise

C. Ground clitter

D. Audio distortion

Answer: B

87. Bandwidth should be ____ to avoid distortion of the signal

A. Equal

B. Twice

C. Thrice

D. 4 times

E. 5 times

Answer: B

88. To avoid aliasing of the signal, signal frequency should be

A. Equal

B. Twice

C. Thrice

D. Half

Answer: C

89. The stability of a general dynamical system with no input can be described with ____ stability

A. PID

B. Haralop

C. Lyapunov

Answer: C

90. A Function is ______ if it lies in open interval

A. differentiable

B. Dependent

C. Independent

D. Not differentiable

Answer: A

91. Fourier transform of discrete time system is represented as

A. continuous frequency spectrum continuous time response

B. discrete frequency spectrum discrete time response

C. discrete frequency spectrum continuous time response

D. continuous frequency spectrum discrete time response

Answer: D

92. ______ signal is defined for all values of time

continuous

93. The partial derivatives fxy and fyx are called ______ partial derivatives

A. Dependent

B. Independent

C. Mixed

Answer: C

94. Mixed derivatives fyx and fxy for

A. Rotor

B. Stator

C. Linear

D. Derivative

Answer: D

95. Define differential equation of cylinder

Qi= A*dh/dt

96. Iterative method

97. d(function)^2/dt^2 = 1/k * d(function)/dt

A. parabolic

B. elliptical equation

C. telegraphy

D. laplace equation

Answer: C

98. y'+2y = 4( x + y )2 is _____ order equation

first

99. Probability of coming 2 in dice

1/6

100. 1

∫ f(x)sin (𝑥)+∞

−∞

is known as

A. Gibbs

B. Euler

C. Dirichlet

D. Green

Answer: B