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Electrical Machines

Electrical Machines
Hopkinss test in DC motor is conducted at ?

 No load.
 Low load.
  Full load.
 None of these.

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Electrical Machines
What is the reason for stationary armature essential in alternators above 5 KVA?

 Operating cost is less.
 Collecting of large current is simple.
All of these
 Insulation requirement is less.

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Electrical Machines
Which of following motor is preferred for belt conveyor?

  Reluctance motor.
  Slip ring induction motor.
  Universal motor.
  Synchronous motors.

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Electrical Machines
A large series motor is never started without some mechanical on it because otherwise it will

 Draw too much current.
 Open fuse or circuit breaker.
  Develop excessive speed and damage itself.
 Produce sparking at brushes.

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Electrical Machines
Belt conveyors offer _______________ starting torque.

  zero.
  medium.
  low.
  high.

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Electrical Machines
Which of the following is/are not a self starting motor?

 1-phase induction motor
None of these
 both 1 and 2
 3-phase induction motor

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MORE MCQ ON Electrical Machines

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