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Synchronous Motors
A synchronous capacitor is an over excited motor running at ________
Full load
None of the listed here
Half full load
No load
Full load
None of the listed here
Half full load
No load
Answer
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Related Question
Synchronous Motors
When the field of a synchronous motor is under-excited, the power factor will be
unity
leading
zero
lagging
unity
leading
zero
lagging
Answer
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Synchronous Motors
The shaft of synchronous motor is made of
Mild steel
Alcino
Chrome steel
Stainless steel
Mild steel
Alcino
Chrome steel
Stainless steel
Answer
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Synchronous Motors
While starting a salient pole synchronous motor by induction motor action and connecting field discharge resistance across field, starting and accelerting torque is produced by
induction motor torque in damper winding
All of the listed here
induction motor torque in field winding
eddy current and hysteresis torque in pole faces
induction motor torque in damper winding
All of the listed here
induction motor torque in field winding
eddy current and hysteresis torque in pole faces
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
The mechanical power developed by a synchronous motor is independent of _________.
Speed
Applied stator voltage
Field excitation
Torque angle
Speed
Applied stator voltage
Field excitation
Torque angle
Answer
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