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Electrician
Electrician Set-1
Polyphase Induction Motors
63

Polyphase Induction Motors MCQ - Electrician (Set-1) with Answers

63) The synchronous speed of an induction motor refers to the speed of the

rotor

armature

rotating magnetic field

value marked on the name plate

Answer is:

rotating magnetic field

Polyphase Induction Motors MCQ - Electrician (Set-1) with Answers

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Related Polyphase Induction Motors MCQ - Electrician (Set-1) with Answers

64) Calculate slip of an induction motor if it has 4 poles, 50Hz, rotor speed is 1400 rpm.

6.6%

6.0%

5.5%

5.0%

Answer is:

6.6%

65) in a 3-phase motor the rotating magnetic field is displaced at an angle of

30 degree

60 degree

90 degree

120 degree

Answer is:

120 degree

66) Which one of the following 3-phase motors is NOT self starting ?

Synchronous motor

Squirrel cage induction motor

Wound rotor motor

Double cage motor

Answer is:

Synchronous motor

67) The motor suitable for loads where constant speed is required is

induction motor

synchronous motor

capacitor motor

universal motor

Answer is:

induction motor

Polyphase Induction Motors MCQ - Electrician (Set-1) with Answers

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