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Synchronous Motors
When a synchronous motor is pulled out of synchronism, the stator current ________
Is increased too much
Is decreased too much
Remains unchanged
Become zero
Is increased too much
Is decreased too much
Remains unchanged
Become zero
Answer
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Related Question
Synchronous Motors
When a unity pf synchronous motor is operated at a leading pf, it results in _______
More than rated rotor current
None of the listed here
Less than rated horsepower output
More than rated horseppwer output
More than rated rotor current
None of the listed here
Less than rated horsepower output
More than rated horseppwer output
Answer
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Synchronous Motors
The pull out torque of a synchronous motor is generally ______ times its full-load torque.
0.5
5 to 10
1.25 to 3.5
6 to 9
0.5
5 to 10
1.25 to 3.5
6 to 9
Answer
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Synchronous Motors
The magnitude of field flux in a 3-phase synchronous motor
Varies with the load
Varies with power factor
Varies with speed
Remains constant at all loads
Varies with the load
Varies with power factor
Varies with speed
Remains constant at all loads
Answer
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Synchronous Motors
The net armature voltage of a synchronous motor is equal to the
arithmetic difference of Eb and V
vector sum of Eb and V
vector difference of Eh and V
arithmetic sum of Eb and V
arithmetic difference of Eb and V
vector sum of Eb and V
vector difference of Eh and V
arithmetic sum of Eb and V
Answer
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Synchronous Motors
The shaft of synchronous motor is made of
Stainless steel
Alcino
Chrome steel
Mild steel
Stainless steel
Alcino
Chrome steel
Mild steel
Answer
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