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Electrical Machines

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

 mild steel.
 cast iron.
 silicon steel.
 fibre.

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Electrical Machines
If the applied voltage of a DC motor is 230 V, then back emf, for maximum power developed is

 200 V.
 460 V.
 230 V.
 115 V.

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Electrical Machines
Induction motors provided with open slots have

  leading power factor.
  less breakdown torque.
  more breakdown torque.
  higher efficiency.

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Electrical Machines
An auto transformer having a transformation ratio of 0.8 supplies a load pf 10 KW. The power transfered inductively from the primary to secondary is

 0.
  2 KW.
 8 KW.
 10 KW.

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Electrical Machines
Regenerative braking is not found in which motor?

 Induction motor.
 DC compound.
  DC series.
 DC shunt.

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Electrical Machines
Synchronous condensers are used to

 improve the power factor
All of these
 improve starting torque
 reduce hunting

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MORE MCQ ON Electrical Machines

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