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Synchronous Motors
A synchronous motor develop maximum power when load angle is
120°
45°
90°
60°
120°
45°
90°
60°
Answer
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Related Question
Synchronous Motors
A synchronous motor runs at only one speed because it ______
Has a damper winding
Has no losses
None of the listed here
Is a doubly fed machine
Has a damper winding
Has no losses
None of the listed here
Is a doubly fed machine
Answer
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Synchronous Motors
Synchronous motors are generally used in application requiring _______
Frequent stopping
Variable speed
Infrequent starting
Sudden application of heavy loads
Frequent stopping
Variable speed
Infrequent starting
Sudden application of heavy loads
Answer
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Synchronous Motors
A synchronous machine with low value of short-circuit ratio has
high stability limit
lower stability limit
good speed regulation
good voltage regulation
high stability limit
lower stability limit
good speed regulation
good voltage regulation
Answer
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Synchronous Motors
A synchronous motor working at leading power factor can be used as
Mechanical synchronizer
Phase advancer
Voltage booster
Noise generator
Mechanical synchronizer
Phase advancer
Voltage booster
Noise generator
Answer
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Synchronous Motors
If the field of a synchronous motor is underexcited, the power factor will be
lagging
zero
leading
unity
lagging
zero
leading
unity
Answer
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