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Electrical Machines

Electrical Machines
At stand still condition the value of slip is

 infinite value
 1
 0
 finite value

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Electrical Machines
In Ward-Leonard system, the lower limit of the speed imposed by

 None of above.
 Residual magnetism of the generator.
 Armature resistance.
 Field resistance.

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Electrical Machines
In salient pole synchronous machine, maximum power occurs at a load angle of

 0°
 90°
 less than 90°
 Greater than 90°

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Electrical Machines
Universal motors are used in

 cranes
 food processing
All of these
 traction

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Electrical Machines
For a dc machine shunt resistance and armature resistance values are

 low and high
 high and high
 high and low
 low and low

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Electrical Machines
A transformer has resistance and reactance in per unit as 0.01 and 0.04 respectively. Its voltage regulation for 0.8 power factor lagging and leading will be

 4.8% and -3.2%
 6% and -4%
None of these
 3.2% and -1.6%

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MORE MCQ ON Electrical Machines

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