INDUCTION MACHINES-MCQ

1. In capacitor start-capacitor run ac motor the capacitor is placed in series with ...........winding.

A. running
B. starting
C. squirrel cage
D. compensating

Ans: B

2. Single phase induction motor .......................

A. runs at synchronous speed
B. is not a self starting motor
C.requires dc excitation for it rotor
D. is a self starting motor

Ans: B

3. In capacitor start motor, the phase displacement between starting and running winding can be nearly

A. 10
B. 30
C. 60
D. 90

Ans: D

4. If the starting winding of a single phase induction motor is left in the circuit,it will

A. run faster
B. run slower
C. draw excessive current and overheat
D. spark at light loads

Ans: C

5. .......................... is called as rotating transformer.

A. reluctance motor
B. synchronous motor
C. induction motor
D. repulsion motor
E. stepper motor

Ans: C

6. A 3-phase slip ring motor has

A. double cage rotor
B. short circuited rotor
C. wound rotor
D. any of these

Ans: C