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Electrician Set-2
AC Three Phase Motor
41

AC Three Phase Motor MCQ with Answers

41) Which type of winding has more space for cooling?

Between overhanging coils

Between overhanging coil and rotor

Between overhanging coils and yoke

Between overhanging coil and wedge

Answer is:

Between overhanging coils and yoke

AC Three Phase Motor MCQ with Answers

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Related AC Three Phase Motor MCQ with Answers

42) Where the panel boards are used?

Industrial motor drives

Domestic wiring circuits

3 phase domestic wiring

Load distribution for AC & DC supply

Answer is:

3 phase domestic wiring

43) Determine the torque in newton metres produced by a 7.5 HP squirrel cage motor rotating at 1440 rpm?

21.63 Nm

24.4 Nm

33.05 Nm

36.6 Nm

Answer is:

36.6 Nm

44) What is the purpose of using rotor resistance starter to start 3 phase slip ring induction motor?

Reduce rotor voltage

Reduce rotor current

Increase the torque

Reduce the power loss

Answer is:

Increase the torque

45) Which method of speed control is only applicable for 3 phase slipring induction motor?

Cascade operation method

Rotor rheostat speed control

Changing the applied frequency method

Changing the number of stator poles method

Answer is:

Rotor rheostat speed control

AC Three Phase Motor MCQ with Answers

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