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Electrical Machines

Electrical Machines
Hopkinss test in DC motor is conducted at ?

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

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Electrical Machines
Which type of motors are used for lathes?

 Cage induction motor.
 Synchronous motor.
 Either A or B.
 DC shunt motors.

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Electrical Machines
Which type of motors are preferred in lifts?

 DC compound motors.
 DC series motors.
 DC shunt motors.
None of these

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Electrical Machines
In a dc machine 6 pole wave winding is used. The number of parallel paths are?

 4
 6
 1
 2

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Electrical Machines
Number of slip rings in 3-phase synchronous motor will be

 3 or 4
 0
 1
 2

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Electrical Machines
Which of the following motor is more expensive for same KW output rating ?

 Induction motor.
 Synchronous motor.
 AC single phase motor.
 DC Shunt Motor

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