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Electrical Machines

Electrical Machines
At stand still condition the value of slip is

 0
 infinite value
 finite value
 1

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Electrical Machines
Two transformers operating in parallel will share the load depending on their

 ratings
 per unit impedance
 leakage reactance
 efficiency

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Electrical Machines
The power factor of an induction motor operating at no load will have a value around

 0.9 lag
 unity
 0.2 lag
 0.2 lead

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Electrical Machines
A 3- phase synchronous motor can operate over a wide range of power factors i.e. from lagging to leading power factor. This is achieved by

 varying the speed.
 changing the field excitation.
 changing the load.
 varying the applied voltage.

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Electrical Machines
Maximum power developed by a synchronous motor depends on

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

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Electrical Machines
What will be the maximum power factor of an induction motor for dispersion coefficient of 0.05?

 1.1.
  0.05.
 20.
  0.905.

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MORE MCQ ON Electrical Machines

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