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Synchronous Motors
Hunting in a synchronous motor can not be due to
Variable load
Variable supply frequency
Windage friction
Variable frequency
Variable load
Variable supply frequency
Windage friction
Variable frequency
Answer
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Related Question
Synchronous Motors
Damper winding in a synchronous motor________
Improve pf of the motor
Reduces windage losses
Serves to start the motor
Increases hunting of the motor
Improve pf of the motor
Reduces windage losses
Serves to start the motor
Increases hunting of the motor
Answer
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Synchronous Motors
The efficiency of a properly designed synchronous motor will usually fall in range
60 to 70%
75 to 80%
85 to 95%
99 to 99.5%
60 to 70%
75 to 80%
85 to 95%
99 to 99.5%
Answer
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Synchronous Motors
Slip rings in a synchronous motor carry
Alternating current
No current
Direct current
All of the listed here
Alternating current
No current
Direct current
All of the listed here
Answer
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Synchronous Motors
The standard full-load power factor ratings for synchronous motors are
unity or 0.8 lagging
unity or 0.8 leading
unity or zero
zero or 0.8 leading
unity or 0.8 lagging
unity or 0.8 leading
unity or zero
zero or 0.8 leading
Answer
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Synchronous Motors
In a synchronous motor which loss varies with load ?
Copper loss
Core loss
Windage loss
Bearing friction loss
Copper loss
Core loss
Windage loss
Bearing friction loss
Answer
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