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Electrical Machines

Electrical Machines
The induction motor shaft is made of

  aluminium.
  cast iron.
  mild steel.
  stainless steel.

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Electrical Machines
In DC generators, the cause of rapid brush wear may be

 severe sparking.
 any of above.
 imperfect contact.
 rough commutator surface.

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Electrical Machines
If a shunt generator delivers 100 A at 200 V, and the resistances of the shunt field and armature are 100 ohms and 0.01 ohms respectively, the generator emf will be

  parallel.
  series.
  no resistance is connected.
  any one of the connection.

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Electrical Machines
If an additional resistance is connected in series with a DC series motor operating at rated speed, the speed of the motor will

 Reduce.
 Remain unaltered.
 Oscillate around the normal speed.
 Increase.

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Electrical Machines
Direction of the current in the compensating winding is________ to the direction of current in the armature conductors?

 exactly opposite
None of these
 same
 either of these

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Electrical Machines
Hunting phenomenon is observed in which motor?

 DC motor.
 Induction motor.
  Synchronous motor.
 Both A and C.

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MORE MCQ ON Electrical Machines

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