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AC 3 Phase Induction motor
1

AC 3 Phase Induction motor MCQ with Answers

1) What is the speed of rotating magnetic field in a 3f induction motor?

Rotor speed

Synchronous speed

Motor speed

Rated speed

Answer is:

Synchronous speed

Explanation:

.

AC 3 Phase Induction motor MCQ with Answers

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Related AC 3 Phase Induction motor MCQ with Answers

2) What is the synchronosis speed of a 3 phase induction motor if the supply frequency is 50 Hz and number of pole is 4?

1400 rpm

1500 rpm

1450 rpm

1000 rpm

Answer is:

1500 rpm

3) Which material is used to wound rotor of squirrel cage induction motor?

Aluminium

Enamelled copper conductor

Silicon steel

Copper bars

Answer is:

Copper bars

4) Which part of squirrel cage rotor is short circuited?

End rings

Shaft

End cover hysteresis

Bearings

Answer is:

End rings

5) Why the core of 3f induction motor is laminated?

To reduce friction loss

To reduce eddy current loss

To reduce hysterism loss

To reduce starting current

Answer is:

To reduce eddy current loss

AC 3 Phase Induction motor MCQ with Answers

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