SYNCHRONOUS MACHINES-MCQ

1. The winding of a 4-pole alternator having 36 slots and a coil span of 1 to 8 is short-pitched by........ degrees.

A.140
B. 80
C. 20
D. 40

Ans: D

2. A 50 HZ alternator will run at the greatest possible speed if it is wound for ...... poles

A. 8
B. 6
C. 4
D. 2

Ans: D

3. An electric motor in which both rotor and stator fields rotates with same speed is called a/an ............. motor

A. DC
B. charge
C. reluctance
D. universal
E. synchronous

Ans: E

4. A synchronous motor can be started by

A. a pony motor
B. dc compound motor
C. providing damper winding
D. any of the above

Ans: D

5. An alternator is also called as _________ generator.

A. asynchronous
B. synchronous
C. Rosenberg
D. dc

Ans: B