AC 3 PHASE INDUCTION MOTOR - Quiz

1) Which type of starter is used with reduced voltage tappings for 3 phase induction motor?

D.O.L starter Star delta starter Auto transformer starter Rotor resistance starter

2) How the voltage is reduced in auto transformer starter at the time of starting?

By reducing supply voltage By adjusting the tappings by handle By using step down transformer By adding resistance with rotor

3) Which induction motor, the external resistance is added to rotor circuit?

Squirrel cage induction motor Double squirrel cage induction motor Slip ring induction motor Single phase induction motor

4) Which motor is used to produce high starting torque at variable speed?

Repulsion motor Permanent capacitor motor 3 Phase slip ring induction motor 3 Phase single squirrel cage induction motor

5) Why slip ring induction motor is fitted with wound rotor?

To reduce the slip To control the speed To reduce the losses To get high starting and running torque