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Electrical Machines

Electrical Machines
Iron losses in a DC machine are independent of variation in

 speed.
  voltage.
  load.
  speed and voltage.

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Electrical Machines
In a dc machine 72 number of coils are used. Find the number of commutator segments required?

 37
 72
 74
 36

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Electrical Machines
An induction motor has a rotor resistance of 0.002 Ω / phase. If the resistance is increased to 0.004 Ω / phase then the maximum torque will

 increase by 100%
 increase by 200%
 reduced to half
 remain unaltered

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Electrical Machines
An ideal DC generated is one that has _____________ voltage regulation.

 negative.
 positive.
  zero.
 low.

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Electrical Machines
Which of the following is the largest conversion device?

 Induction machine
All of these
 Synchronous machine
 DC machine

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Electrical Machines
DC Shunt Motor has disadvantage(s) of

 constant speed.
 less expensive.
 none of above.
 not suitable for rapidly changing loads.

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MORE MCQ ON Electrical Machines

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