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Electrical Machines

Electrical Machines
The wound rotor type IM is used for____________ speed operation.

  maximum.
  constant.
  variable.
  minimum.

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Electrical Machines
The core flux in transformer depends mainly on

 supply voltage
 supply voltage, frequency and load
 supply voltage and load
 supply voltage and frequency

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Electrical Machines
Tappings of a transformer are provided

 at the phase end of hv side
 at the phase end of lv side
 at the middle of hv side
 at the neutral side end of hv side

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Electrical Machines
A transformer has hysteresis loss of 30 W, at 240 V, 60 Hz. The hysteresis loss at 200 V, 50 Hz will be

 30 W.
 36 W.
 28 W.
 25 W.

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Electrical Machines
What is the function of inter pole in DC generator?

 To get a superior commutation.
 To serve the economical aspects.
 To neutralize the distortion of main field flux due to armature reaction.
  Both option B and C.

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

 35°C.
  45°C.
 27°C.
 32°C.

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MORE MCQ ON Electrical Machines

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