AC 3 PHASE INDUCTION MOTOR - Practice Mode

1) Which type of rotor is used in squirrelcage induction motor?

Wound type Squirrel cage Slipring type Projecting type

Correct Answer: Squirrel cage

2) Why rotor bars of squirrel cage induction motor is skewed?

Reduce magnetic humming Reduce losses Improve efficiency Improve capacity

Correct Answer: Reduce magnetic humming

3) How to change the direction of rotation of a 3f squirrel cage induction motor?

By interchanging three terminals By interchanging any two terminals By disconnecting one terminal By reducing the applied voltage

Correct Answer: By interchanging any two terminals

4) Which type of starter is recommended to start upto 3 HP squirrelcage induction motors?

DOL starter Auto transfer starter Star-delta starter Rotor resistance starter

Correct Answer: DOL starter

5) Which starter is in simple expensive and easy to start?

Rotor resistance starter DOL starter Semi automatic star delta starter Auto transformer starter

Correct Answer: DOL starter

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