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AC 3 Phase Induction motor
13

AC 3 Phase Induction motor MCQ with Answers

13) 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

Answer is:

By interchanging any two terminals

AC 3 Phase Induction motor MCQ with Answers

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Related AC 3 Phase Induction motor MCQ with Answers

14) 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

Answer is:

DOL starter

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

Rotor resistance starter

DOL starter

Semi automatic star delta starter

Auto transformer starter

Answer is:

DOL starter

16) Which device in DOL starter provides effective protection against over load?

Holding coil

Back up fuse

Thermal relay

Push button switch

Answer is:

Thermal relay

17) How many number of contactors are used in a semi automatic star delta starter?

6

4

5

3

Answer is:

3

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