ELECTRICAL ENGINEERING QUESTION ANSWERS

Q. No. 1. Various adjustments in an energy meter include
(a) light load or friction
(b) lag and creep
(c) overload and voltage compensation
(d) temperature compensation
(e) all of the above
Answer: (e) all of the above

Q. No. 2. The line trap unit employed in carrier current relaying:
(A) offers high impedance to 50 Hz power frequency signal
(B) offers high impedance to carrier frequency signal
(C) offers low impedance to carrier frequency signal
(D) Both (A) & (C)
Answer: (B) offers high impedance to carrier frequency signal


Q. No. 3.Most sensitive galvanometer is
(a) elastic galvanometer
(b) spot ballistic galvanometer
(c) Duddlb galvanometer
(d) vibration galvanometer
Answer: (b) spot ballistic galvanometer

Q. No. 4.The output of a feedback control system must be a function of
(a) reference and output
(b) input and feedback signal
(e) reference and input
(d) output and feedback signal
Answer: (a) reference and output


Q. No. 5. No load current in a transformer:
 (A) lags the applied voltage by 90°
(B) leads the applied voltage by somewhat less than 90°
 (C) leads the applied voltage by 90°
 (D) lags the applied voltage by somewhat less than 90°
 Answer:  (D) lags the applied voltage by somewhat less than 90°

Q. No. 6. E.m.f. of a Weston cell is accurately measured by
(a) isothermal voltmeter
(b) hot wire voltmeter
(c) electrostatic voltmeter
(d) electrodynamic voltmeter
Answer: (c) electrostatic voltmeter

Q. No. 7. technique is not applicable to nonlinear system ?
(a) Phase-plane representation
(b) Quasi linearization
(c) Functional analysis

Answer: (d) Nyquist Criterion

Q. No. 8. A 3 stack stepper motor with 12 numbers of rotor teeth has a step angle of
____________.
(A) 12°
(B) 10°

(C) 24°
(D) 8°
 Answer: (B) 10°

Q. No. 9.Commonly used standard capacitor is
(a) spherical type
(b) electrostatic type
(c) concentric cylindrical type
(d) multilayer parallel plate type
Answer: (c) concentric cylindrical type

Q. No. 10. The relative speed between the magnetic fields of stator and rotor under steady state
operation is zero for a
(A) dc machine.
(B) 3 phase induction machine.
(C) synchronous machine.
(D) single phase induction machine.
Answer: all options are correct

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