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Electrical Machines

Electrical Machines
A DC generator without commutator is a

 AC generator
 DC generator
 DC motor
 induction motor

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Electrical Machines
For higher values of armature, the speed of a DC series motor is

  Constant.
 Proportional to the square of armature current.
 Inversely proportional to armature current.
 Proportional to armature current.

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Electrical Machines
In a DC Shunt Motor the speed can be increased by

 Increasing the armature current.
 Increasing the field current.
 Increasing the field current.
 Decreasing the field current.

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Electrical Machines
In double cage induction motor, the inner cage offers

  low resistance and high reactance.
  high resistance and high reactance.
  low resistance and low reactance.
  high resistance and low reactance.

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Electrical Machines
In a synchronous generator, if mechanical input is increased with constant excitation, the load angle will

None of these
 increase
 either increase or decrease
 decrease

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Electrical Machines
For a transformer to be tested at full load conditions but consuming only losses from the main, we do

 back to back test
None of these
 load test
 OC and SC tests

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MORE MCQ ON Electrical Machines

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