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Synchronous Motors
The pull out torque of a synchronous motor is generally ______ times its full-load torque.
6 to 9
1.25 to 3.5
0.5
5 to 10
6 to 9
1.25 to 3.5
0.5
5 to 10
Answer
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Related Question
Synchronous Motors
The construction of a synchronous motor resembles
an alternator
an induction motor
a rotary converter
a series motor
an alternator
an induction motor
a rotary converter
a series motor
Answer
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Synchronous Motors
The speed of a synchronous motor can be changed by varying _______
Supply frequency
Mechanical load
None of the listed here
Field excitation
Supply frequency
Mechanical load
None of the listed here
Field excitation
Answer
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Synchronous Motors
A synchronous motor is cheaper than 3-phase induction motor for _____
High speed, low output
High speed, high output
None of the listed here
Low speed, high output
High speed, low output
High speed, high output
None of the listed here
Low speed, high output
Answer
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Synchronous Motors
By which of the following methods the constant speed of a synchronous motor can be changed to new fixed value ?
By interchanging any two phases
By changing the supply frequency
By changing the applied voltage
By changing the load
By interchanging any two phases
By changing the supply frequency
By changing the applied voltage
By changing the load
Answer
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Synchronous Motors
A synchronous machine with low value 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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