Practice Test: Question Set - 06
1. Speed torque characteristic of a repulsion induction motor is similar to that of a D.C.
- (A) Shunt motor
- (B) Series motor
- (C) Compound motor
- (D) Separately excited motor
2. If the centrifugal switch of a two-value capacitor motor using two capacitors fails to open then
- (A) Motor will not come up to speed
- (B) Motor will not carry the load
- (C) Current drawn by the motor will be
excessively high
- (D) Electrolytic capacitor will, in all probability,
suffer break down
3. Which of the following statements regarding a reluctance motor is incorrect?
- (A) It cannot be reversed, ordinarily
- (B) It requires no D.C. field excitation for its
operation
- (C) It is nothing else but a single-phase, salient
pole synchronous-induction motor
- (D) Its squirrel cage-rotor is of unsymmetrical magnetic
construction in order to vary reluctance path between stator and rotor
4. Which of the following motor will have relatively higher power factor?
- (A) Capacitor run motor
- (B) Shaded pole motor
- (C) Capacitor start motor
- (D) Split phase motor
5. Which of the following motors is inherently self starting?
- (A) Split motor
- (B) Shaded-pole motor
- (C) Reluctance motor
- (D) None of these
6. The motor used on small lathes is usually
- (A) Universal motor
- (B) D.C. shunt motor
- (C) Single-phase capacitor run motor
- (D) 3-phase synchronous motor
7. In A.C. series motor compensating winding is employed to
- (A) Reduce the effects of armature reaction
- (B) Increase the torque
- (C) Reduce sparking at the brushes
- (D) None of the above
8. In which single-phase motor, the rotor has no teeth or winding?
- (A) Split phase motor
- (B) Reluctance motor
- (C) Hysteresis motor
- (D) Universal motor
9. In repulsion motor, maximum torque is developed when
- (A) Brush axis is at 45° electrical to the field axis
- (B) Brush axis coincides with the field axis
- (C) Brush axis is at 90° electrical to the field axis
- (D) None of the above
10. Which of the following motors is used in tape-recorders?
- (A) Hysteresis motor
- (B) Reluctance motor
- (C) Capacitor-run motor
- (D) Universal motor
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