Single Phase Induction Motor objective Type Questions - Set 06 - ObjectiveBooks

Single Phase Induction Motor objective Type Questions - Set 06

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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