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Electrical Machines

Electrical Machines
The 3 - Φ induction motor with rotor circuit open will

  make noise.
  run normally.
  get over heated.
  not run.

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Electrical Machines
Slip test is performed to determine

All of these
 slip
 direct axis reactance and quadrature axis reactance
 positive sequence reactance and negative sequence reactance

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Electrical Machines
Find the reactance voltage when current is changed from -2A to 2A in 4 sec and self inductance is 1H?

 2 V
 1 V
 0 V
 4 V

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Electrical Machines
If the number of rotor slots is equal to number of stator slots, then motor refuses to start. Hence it is known as

  crawling.
  air gap.
  cogging.
  relative speed.

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Electrical Machines
The total core loss of a 400 V, 50 Hz transformer is 2400W, when it is supplied by 200 V, 25 Hz loss is 800W. Calculate eddy current loss and hysteresis loss?

 1000W , 1400W
 800W, 1600W
 1400W, 1000W
 1600W, 800W

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Electrical Machines
No load saturation characteristics are plotted between

 no load voltage and armature current
 no load voltage and field current
 short circuit current and field current
 short circuit current and armature current

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Electrical Machines

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