Practice Test: Question Set - 10
1. In split phase motor main winding is of
- (A) Thin wire placed at the top of the slots
- (B) Thin wire placed at the bottom of the slots
- (C) Thick wire placed at the bottom of the slots
- (D) Thick wire placed at the top of the slots
2. After the starting winding of a single phase induction motor is disconnected from supply, it continues to run only on
- (A) Running winding
- (B) Rotor winding
- (C) Field winding
- (D) Compensating winding
3. The rotor developed by a single-phase motor at starting is
- (A) More than the rated torque
- (B) Rated torque
- (C) Less than the rated torque
- (D) Zero
4. In a capacitor start single-phase motor, when capacitor is replaced by a resistance
- (A) Torque will increase
- (B) The motor will consume less power
- (C) Motor will run in reverse direction
- (D) Motor will continue to run in same direction
5. Which of the following single-phase motors has relatively poor starting torque?
- (A) Universal motor
- (B) Repulsion motor
- (C) Capacitor motor
- (D) All single phase motors have zero starting
torque
6. In a universal motor, the most common cause of brush sparking is
- (A) Open armature winding
- (B) Shorted armature winding
- (C) Shorted field winding
- (D) All of the above
7. Which of the following motors is used in a situation where load increases with speed?
- (A) Induction motor
- (B) Three-phase series motor
- (C) Schrage motor
- (D) Hysteresis motor
8. The repulsion-start induction-run motor is used because of
- (A) Good power factor
- (B) High efficiency
- (C) Minimum cost
- (D) High starting torque
9. Which of the following single-phase motors is suitable for timing and control purposes?
- (A) Reluctance motor
- (B) Series motor
- (C) Repulsion motor
- (D) Universal motor
10. In a A.C. series motor armature coils are usually connected to commutator
- (A) Through resistance
- (B) Through reactance
- (C) Through capacitors
- (D) Solidly
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