Electrical Engineering Questions with Answer

Electrical Engineering Questions with Answer published on 06/05/2019

 $1. In a transformer the voltage regulation will be zero when it operates at
(A) unity p.f.
(B) leading p.f.
(C) lagging p.f.
(D) zero p.f. leading.
Ans: B

$2. An induction meter can handle current upto
(a) 10 A
(b) 30 A
(c) 60 A
(d) 100 A
Ans: d



$3. The maximum power in a synchronous machine is obtained when the load angle is

(A) 0°
(B) 85°
(C) 120°
(D) 135°.

Answer: (B) 85°

$4 In a 3-phase synchronous motor
 (A) the speed of stator MMF is always more than that of rotor MMF.
 (B) the speed of stator MMF is always less than that of rotor MMF.
 (C) the speed of stator MMF is synchronous speed while that of rotor MMF is zero.
 (D) rotor and stator MMF are stationary with respect to each other.
 Ans: D

$5. The switch board instruments
(a) should be mounted in vertical position
(6) should be mounted in horizontal position
(c) either (a) or (b)
(d) neither (a) nor (b)
Ans: a




$6.  Low head plants generally use
(A) Pelton Turbines
(B) Francis Turbine
(C) Pelton or Francis Turbine
(D) Kaplan Turbines
Ans: A

$7. A generator is operating by itself supplying the system loads. The reactive power supplied by the generator will

(A) depend on prime mover rpm
(B) depend on type of insulation used
(C) depend on the amount demanded by the load
(D) depend on inter-coil inductance.

Answer: (C) depend on the amount demanded by the load

$8. While applying Fleming's right-hand rule to And the direction of induced e.m.f., the thumb points towards
(a) direction of induced e.m.f.
(b) direction of flux
(c) direction of motion of the conductor if forefinger points in the direction of generated e.m.f.
(d) direction of motion of conductor, if forefinger points along the lines of flux
Ans: d




$9. For measuring a very high resistance we should use
(a) Kelvin's double bridge
(b) Wheat stone bridge
(c) Meggar
(d) None of the above
Ans: c

$10. In an Anderson bridge, the unknown inductance is measured in terms of
(a) known inductance and resistance
(b) known capacitance and resistance
(c) known resistance
(d) known inductance
Ans: b

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Author: Sathish

Date published: 5/6/19