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Electrical Machines

Electrical Machines
Maximum allowable moisture content of power transformer insulating oil is generally taken as

 45 ppm.
 20 ppm.
  35 ppm.
 25 ppm.

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Electrical Machines
The short circuit test on a transformer is conducted to obtain

 eddy current loss.
 core loses only.
  copper losses.
 hysteresis loss.

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Electrical Machines
Which type of single phase induction motor is having the highest power factor at full load ?

 Split phase type.
  Capacitor run type.
 Capacitor start.
 Shaded pole type.

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Electrical Machines
The output power indicated on the name plate of any motor is always the

 Output power at the shaft.
 Power drawn in KVA.
 Power drawn in KW.
 Gross power.

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Electrical Machines
The speed of rotation of 5th harmonic component in the stator of an induction motor is

 (1 / 15) times the synchronous speed.
  (1 / 5) times the synchronous speed.
  0.5 times the synchronous speed.
 5 times the synchronous speed.

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Electrical Machines
A DC compound motor has

 only series field winding.
 both shunt and series field winding.
 only shunt field winding.
 tertiary winding.

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MORE MCQ ON Electrical Machines

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