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Synchronous Motors
The shaft of synchronous motor is made of
Mild steel
Alcino
Stainless steel
Chrome steel
Mild steel
Alcino
Stainless steel
Chrome steel
Answer
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Related Question
Synchronous Motors
A synchronous motor will always stop when
Load in motor varies
Supply voltage frequency changes
Supply voltage fluctuates
Excitation winding gets disconnected
Load in motor varies
Supply voltage frequency changes
Supply voltage fluctuates
Excitation winding gets disconnected
Answer
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Synchronous Motors
In a synchronous motor, the forced vibrations will be maximum when driving
A reciprocating air compressor
A centrifugal blower
Any of the listed here
A centrifugal pump
A reciprocating air compressor
A centrifugal blower
Any of the listed here
A centrifugal pump
Answer
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Synchronous Motors
If a synchronous motor is operating at a supply frequency of 50 cycles/second, then, rotor revolves at ______
25 cycles/ second
50 cycles/second
100 cycles/second
None of the listed here
25 cycles/ second
50 cycles/second
100 cycles/second
None of the listed here
Answer
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Synchronous Motors
In a 3-phase synchronous motor, the negative phase sequence exists when the motor is
over-loaded
supplied with unbalanced voltage
None of these
under-loaded
over-loaded
supplied with unbalanced voltage
None of these
under-loaded
Answer
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Synchronous Motors
In case one phase of a three-phase synchronous motor is short-circuited the motor will
run with excessive vibrations
take less than the rated load
run at 2/3 of synchronous speed
not start
run with excessive vibrations
take less than the rated load
run at 2/3 of synchronous speed
not start
Answer
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