Induction Motors MCQs - Quiz 1

1. In a split phase motor, the running winding should have:
A) high resistance & low inductance
B) low resistance & high inductance
C) high resistance & high inductance
D) low resistance & low inductiance

The correct answer is B

2. In capacitor start single-phase motors current in the starting winding:
A) leads the voltage
B) lags the voltage
C) is in phase with voltage in running winding
D) none of the above

The correct answer is A

3. If the capacitor of a single-phase motor is short-circuited, then the motor
A) will start
B) will not start
C) run in reverse direction
D) run at reduced rpm

The correct answer is B

4. In capacitor start motors, the phase displacement between starting winding and running winding can nearly be ___ degrees.
A) 30
B) 45
C) 60
D) 90

The correct answer is D

5. Which of these motors will have relatively high starting torque?
A) Salient pole motor
B) Split phase motor
C) Capacitor start motor
D) Shaded pole motor

The correct answer is C

6. The revolving field in a shaded pole single-phase motor is produced by the use of:
A) shading coils
B) resistor
C) inductor
D) capacitor

The correct answer is A

7. Which of these motors will have relatively high power factor?
A) Salient pole motor
B) Split phase motor
C) Capacitor run motor
D) Shaded pole motor

The correct answer is C

8. For high speed and high starting torque, ___ will be selected.
A) Capacitor start motor
B) Capacitor run motor
C) Split phase motor
D) Universal motor

The correct answer is D

9. Fractional horse power motor has a starting capacitor of ___ uF.
A) 100
B) 200
C) 300
D) 400

The correct answer is C

10. The motor used in mixer grinder is generally a:
A) Repulsion motor
B) Reluctance motor
C) Hysteresis motor
D) Universal motor

The correct answer is D