electrical

Three Phase Induction Motor MCQ Objective Questions and Answers Page - 1

1.

An induction motor works with

Answer/ Hint      

Answer : B

Explanation :

2.

The stator frame in an induction  motor is used to

Answer/ Hint      

Answer : A

Explanation :

3.

The frame of an  induction motor is made of

Answer/ Hint      

Answer : C

Explanation :

4.

The  stator core of a 3- phase induction  motor is laminated in order to reduce the

Answer/ Hint      

Answer : A

Explanation :

5.

Use of fractional pitch winding

Answer/ Hint      

Answer : D

Explanation :

6.

If all the stator coils of an induction motor are connected for the same magnetic polarity , there will be formed an equal number of

Answer/ Hint      

Answer : C

Explanation :

7.

The induction motor shaft should be

Answer/ Hint      

Answer : B

Explanation :

8.

The induction motor shaft is made of

Answer/ Hint      

Answer : A

Explanation :

9.

Induction motors normally use diecast aluminum rotor because aluminium is

Answer/ Hint      

Answer : C

Explanation :

10.

In a 3 phase squirrel cage induction motor

Answer/ Hint      

Answer : A

Explanation :

11.

The squirrel cage rotor of a 6-pole induction motor can be used fro ____induction motor

Answer/ Hint      

Answer : C

Explanation :

12.

The squirrel cage induction motors are provided with blades in order to

Answer/ Hint      

Answer : A

Explanation :

13.

The rotor of a 3-phase wound rotor induction motor is provided with

Answer/ Hint      

Answer : B

Explanation :

14.

In a 3-phase slip ring induction motor, the rotor winding terminals are brought out through slip rings to

Answer/ Hint      

Answer : A

Explanation :

15.

The rotor winding for a 3-phase slip ring induction motor having delta connected stator must be connected in

Answer/ Hint      

Answer : B

Explanation :

16.

In a 3-phase slip ring induction motor, brushes are connected to

Answer/ Hint      

Answer : A

Explanation :

17.

In a 3-phase wound rotor induction motor the short circuit gear is used to short circuit the

Answer/ Hint      

Answer : B

Explanation :

18.

Uneven gap in an induction motor is likely to cause

Answer/ Hint      

Answer : C

Explanation :

19.

A smaller air gaps in a polyphase induction motor helps to

Answer/ Hint      

Answer : D

Explanation :

20.

In an induction motor, if the air gap is increased

Answer/ Hint      

Answer : C

Explanation :

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