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Electrical Machines

Electrical Machines
The wound rotor type IM is used for____________ speed operation.

  minimum.
  constant.
  maximum.
  variable.

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Electrical Machines
Counter emf of a DC motor

 regulates its armature voltage.
 helps in energy conversion.
 aids applied voltage.
 exceeds supply voltage

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Electrical Machines
DC series motor is best suited for electric traction as

 It consume less power.
  It develops high starting torque.
 It is cheaper in cost.
 It runs at very high speed at light load.

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Electrical Machines
Commonly used starters of cage motor is

None of these
  star delta.
  DOL.
  both A and B.

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Electrical Machines
In induction motor wound rotor motor is mainly is used in application where

  high starting torque.
 power factor is less.
  low starting torque.
  less costly motor is not required.

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Electrical Machines
The voltage regulation of a DC generator at full load being zero implies that the generator is

  cumulatively compounded.
 shunt connected.
  deferentially compounded.
  series connected.

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MORE MCQ ON Electrical Machines

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