Electrical Engineering Foreman recruitment Questions- 20 MCQ

Electrical Engineering Foreman recruitment Questions- 20 MCQ

Electrical Engineering Foreman recruitment Questions List 1

Electrical Question No # 1. Find the resolution of a 10-bit analog to digital converter for an input range of 10 V.
(A) 97.7 mV (B) 9.77 mV
(C) 0.977 mV (D) 977 mV

 
Electrical Question No # 2. Class A commutation is also called ______.
(A) Self commutation (B) Resonant pulse commutation
(C) Complementary commutation (D) Line commutation

Electrical Question No # 3. The advantages of using freewheeling diode are
(A) Input power factor is improved (B) Load current waveform is improved
(C) Better load performance (D) All of the above

Electrical Question No # 4. Op-amp has differential gain of 10,000 and CMMR of 100 dB. The common mode
voltage gain is
(A) 10 (B) 100
(C) 1 (D) 0.1

Electrical Question No # 5. Which is not a characteristic of an ideal op-amp ?
(A) Infinite slew rate (B) Infinite band width
(C) High output impedance (D) High CMMR

Electrical Engineering Foreman recruitment Questions List 2

Electrical Question No # 6. The output of an op-amp increase 8 V in 14 s. The slew rate is
(A) 1.25 (B) 0.87
(C) 0.57 (D) 1.25

Electrical Question No # 7. Consider the block diagram of a control system shown in figure below.
The canonical form of the above block diagram is
(A)
(B)
(C)
(D)

Electrical Question No # 8. In the above signal flow graph, there are _____ number of combinations of two non-
touching loops.
(A) 2 (B) 3
(C) 4 (D) 5

Electrical Question No # 9. A system produces an output 12 S(S2 + 5S + 4), for a unit step input.
The nature of the response is

(A) undamped (B) under damped
(C) critically damped (D) over damped

Electrical Question No # 10. The peak time Tp = 3 second for a system to which unit step input is applied. The
damping frequency in radians/second is
(A) 1.57 (B) 1.05
(C) 0.95 (D) 0.64

Electrical Engineering Foreman recruitment Questions List 3

Electrical Question No # 11. The positional error co-efficient is
(A) 8 (B) 9
(C) 6 (D) 5

Electrical Question No # 12. In type – 1 system, the velocity lag error is
(A) Inversely proportional to band width of the system.
(B) Directly proportional to the gain constant.
(C) Inversely proportional to the gain constant.
(D) Independent of gain constant.

Electrical Question No # 13. Which of the following is true for Routh’s criterion ?
1. It gives an idea about absolute stability.
2. The degree of instability and means to avoid it is not indicated by Routh’s criterion.
3. It indicates the number and values of unstable roots.
(A) Both 1 & 2 (B) Both 2 & 3
(C) Both 1 & 3 (D) All of 1, 2 & 3

Electrical Question No # 14. The effects of adding poles and zeros can be determined quickly by
(A) Nicholas chart (B) Nyquist plot
(C) Root locus (D) Bode plot

Electrical Question No # 15. The Nyquist plot is given as
The gain margin is
(A) 3.33 (B) – 3.33
(C) 0.33 (D) – 0.33

Electrical Engineering Foreman recruitment Questions List 4

Electrical Question No # 16. Which of the following is not an integrating instrument ?
(A) Electrolytic meters (B) Motor meter
(C) Clock meter (D) Galvanometer

Electrical Question No # 17. Fluid friction damping can be used for
(A) horizontally mounted instruments (B) vertically mounted instruments
(C) both (A) and (B) (D) None

Electrical Question No #  18. The sweep generator of a CRO is used to produce
(A) A sawtooth voltage for the horizontal deflection of electron beam.
(B) A sinusoidal voltage for the vertical deflection of the electron beam
(C) A sinusoidal voltage for the horizontal deflection of the electron beam
(D) A sawtooth voltage for the vertical deflection of the electron beam

Electrical Question No # 19. A moving coil ammeter has a uniform scale with 100 divisions and gives full scale
reading of 10 A. The instrument can read upto 1/5th of a scale division with a fair degree
of certainity. Determine the resolution of the instrument in amperes.
(A) 0.01 A (B) 0.04 A
(C) 0.02 A (D) 0.03 A

Electrical Question No # 20. A signal has a spectrum ranging from 0 to 15 kHz is to be sampled to be converted to discrete form. What is the minimum number of samples per second that must be taken to ensure recovery ?
(A) 7,500 samples /second (B) 30,000 samples /second
(C) 15,000 samples/second (D) 60,000 samples /second

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