A. avoid excessive sheath losses
B. make it flexible
C. either of the above
D. none of the above
✅ The correct answer is option A.
Electrical Engineering MCQs
Iron losses in a D.C. machine are independent of variations in_____________?
A. speed
B. load
C. voltage
D. speed and voltage
✅ The correct answer is option B.
An SCR is turned off when ________________?
A. Anode current is reduced to zero
B. Gate voltage is reduced to zero
C. Gate is reverse biased
D. None of the above
✅ The correct answer is option A.
A D.C. series motor is that which______________?
A. has its field winding consisting of thick wire and less turns
B. has a poor torque
C. can be started easily without load
D. has almost constant speed
✅ The correct answer is option A.
The low power factor of induction motor is due to___________?
A. rotor leakage reactance
B. stator reactance
C. the reactive lagging magnetizing current necessary to generate the magnetic flux
D. all of the above
✅ The correct answer is option D.
The insulation of the cable decreases with__________?
A. the increase in length of the insulation
B. the decrease in the length of the insulation
C. either A. or (b)
D. none of the above
✅ The correct answer is option A.
Which quantity should be measured by the voltmeter ?
A. Current
B. Voltage
C. Power
D. Speed
✅ The correct answer is option B.
A series generator can self-excite:______________?
A. only if the load current is zero
B. only if the load current is not zero
C. irrespective of the value of load current
D. none of the above
✅ The correct answer is option B.
A cable carrying alternating current has__________?
A. hysteresis losses only
B. hysteresis and leakage losses only
C. hysteresis, leakage and copper losses only
D. hysteresis, leakage, copper and friction losses
✅ The correct answer is option B.
At parallel resonance, the ratio L/C is ______________?
A. Very large
B. Zero
C. Small
D. None of the above
✅ The correct answer is option A.