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Electrical Machines

Electrical Machines
In dc machines, the space distribution of air-gap flux density wave at no load is

 co- sinusoidal
 sinusoidal
 rectangular
 flat-topped

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Electrical Machines
What are the starters used for starting of cage motors?

  All of these.
 Auto transformer starter.
 DOL starter.
 Star-delta starter.

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Electrical Machines
Slot wedges in a dc machine is made up of

 fibre.
 mild steel.
 silicon steel.
 cast iron.

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Electrical Machines
A smaller air gap in a polyphase induction motor helps to

  reduce the magnetizing current.
  increase the starting torque.
  reduce the chance of crawling.
  reduce the chance of cogging.

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Electrical Machines
The output power indicated on the name plate of any motor is always the

 Output power at the shaft.
 Power drawn in KVA.
 Gross power.
 Power drawn in KW.

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Electrical Machines
Which type of motors are used for lathes?

 Cage induction motor.
 Synchronous motor.
 Either A or B.
 DC shunt motors.

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MORE MCQ ON Electrical Machines

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