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Electrical Machines

Electrical Machines
At stand still condition the value of slip is

 1
 0
 finite value
 infinite value

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Electrical Machines
Tappings of a transformer are provided

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

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Electrical Machines
The slight curvature at the lower end of the OCC of a self excited DC generator is due to

  high field resistance.
  residual flux.
  magnetic inertia.
  high speed.

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Electrical Machines
The stator frame in an induction motor is used to

  provide return path for the flux.
  hold armature stamping in position.
  ventilate the armature.
  protect the whole machine.

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Electrical Machines
In a 3 - Φ wound rotor induction motor the short circuit gear is used to short circuit the

None of these
  rotor at slip rings.
  stator phases of the motor.
  starting resistance in the starter.

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Electrical Machines
A 440 V, 3-phase, 10 pole and 50 HZ synchronous motor delivering a torque of 50 N-m, delivers a power of

 100W
 3000W
 500W
 1000W

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MORE MCQ ON Electrical Machines

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