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ELECTRICAL MACHINES

Electrical Machines
In diesel engine, gas engine type of machine contains ___________________ pole type of alternator.

 none of these.
 cylindrical.
 non uniform cylindrical.
  salient.

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Electrical Machines
What is the frequency of a alternator, if P = number of poles and N = revolution made per second?

 120N / P Hz.
  PN / 2 Hz.
 120 / PN Hz.
 120P / N Hz.

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Electrical Machines
In alternator, the rotary part is

 none of these.
 core.
  magnetic field poles.
 armature.

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Electrical Machines
A series motor is efficiently suitable for

 none of these.
  high starting torque operation.
 low starting torque operation.
 constant speed operation.

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Electrical Machines
A single-winding single-phase motor has

 starting torque equal to full-load torque.
 high starting torque.
  zero starting torque.
 low starting torque.

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