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Electrician Practice Test: Synchronous Motor
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Electrician Practice Test: Synchronous Motor
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25 Questions

1. Which is the disadvantages of low power factor
2. A synchronous motor working at leading power factor can be used as
3. The construction of a synchronous motor resembles
4. Mostly, synchronous motors are of
5. A three-phase synchronous motor will have
6. The hunting in a synchronous motor takes place when
7. The percentage slip in case of a synchronous motor is
8. The back emf set up in the stator of a synchronous motor will depend on
9. An over excited synchronous motor is used for
10. Where the damper winding is embedded in a synchronous motor
11. The maximum value of torque that a synchronous motor, can develop without losing its synchronism, is known as
12. The purpose of embedding the damper winding in the pole face is to
13. When the excitation of an unloaded salient pole synchronous motor suddenly gets disconnected
14. The synchronous motors are not self-starting because
15. A synchronous motor can develop synchronous torque
16. In a synchronous motor, the maximum power developed depends on all of the following except
17. The armature current of the synchronous motor has large values for
18. A synchronous motor can be used as a synchronous capacitor when it is
19. The damping winding in a synchronous motor is generally used
20. Slip-rings in a synchronous motor carry
21. In case the field of a synchronous motor is under excited, the power factor will be
22. What is the purpose of damper winding in a synchronous motor at starting?
23. How many poles are in the pony motor compared with synchronous motor?
24. Why the synchronous motor fails to run at synchronous speed?
25. A synchronous machine is called a doubly excited machine because

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