AC THREE PHASE MOTOR - Practice Mode

1) Which type of AC winding the number of coil/pole/phase is more than one at different pitches?

Involute coil winding Diamond coil winding Flat loop over lapped winding Flat loop non-over lapped winding

Correct Answer: Flat loop non-over lapped winding

2) Calculate the number of coils /phase/ pole for a 3 phase double layer distributed winding for a motor having 36 slots, 36 coils and 4 poles?

3 coils /phase/ pole 6 coils / phase/pole 9 coils / phase/pole 12 coils/ phase/ pole

Correct Answer: 3 coils /phase/ pole

3) Which type of starter is used to start and run the 3 phase slip ring induction motor?

Direct on-line starter Rotor rheostat starter Auto transformer starter Manual star-delta starter

Correct Answer: Rotor rheostat starter

4) Which type of winding wire is used to wind submersible pump motors?

PVC covered type Terylene thread type Super enamelled type Double cotton covered type

Correct Answer: PVC covered type

5) What is the reason of long chord winding is avoided in AC motors?

Low efficiency Low starting torque More winding wire required Less heat dissipation

Correct Answer: More winding wire required

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