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Electrical Machines

Electrical Machines
At stand still condition the value of slip is

 1
 finite value
 0
 infinite value

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Electrical Machines
Normally for the design of transformer the ambient temperature is taken as

 32°C.
 35°C.
  45°C.
 27°C.

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Electrical Machines
Maximum power developed by a synchronous motor depends on

 supply voltage and load angle
 excitation and load angle
 supply voltage and excitation
 supply voltage, load angle and excitation

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Electrical Machines
What happens if fifth multiples of harmonics is given to induction motor?

  Fail to start.
  Either short circuit or open circuit occurs.
  It will rotates in reverse direction.
  It will rotates in normal operation.

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Electrical Machines
The output power of any electrical motor is taken from the

 Armature.
 Coupling mounted on the shaft.
 Motor frame.
 Field.

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Electrical Machines
In which of the following motors DC excitation is not required?

 3-phase synchronous motor
 hysteresis motor
 3-phase synchronous generator
 reluctance motor

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MORE MCQ ON Electrical Machines

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