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Synchronous Motors
The capacity of a synchronous capacitor is generally in the range of
kVAR
None of the listed here
VAR
MVAR
kVAR
None of the listed here
VAR
MVAR
Answer
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Related Question
Synchronous Motors
While running, a synchronous motor is compelled to run at synchronous speed because of _______
Compulsion due to lenz's law
Induced emf in rotor field winding by stator flux
Magnetic locking between stator and rotor poles
Damper winding in its pole faces
Compulsion due to lenz's law
Induced emf in rotor field winding by stator flux
Magnetic locking between stator and rotor poles
Damper winding in its pole faces
Answer
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Synchronous Motors
The minimum armature current of the synchronous motor corresponds to operation at
unity power factor
zero power factor leading
0.707 power factor leading
0.707 power factor lagging
unity power factor
zero power factor leading
0.707 power factor leading
0.707 power factor lagging
Answer
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Synchronous Motors
A synchronous motor connected to infinite bus-bars has at constant full load, 100% excitation and unity power factor. On changing the excitation only, the armature current will have
no change of power factor
lagging power factor with over-excitation
leading power factor with under-excitation
leading power factor with over-excitation
no change of power factor
lagging power factor with over-excitation
leading power factor with under-excitation
leading power factor with over-excitation
Answer
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Synchronous Motors
A three phase synchronous motor will have
Three slip rings
One slip rings
Two slip rings
No slip rings
Three slip rings
One slip rings
Two slip rings
No slip rings
Answer
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Synchronous Motors
The shaft of synchronous motor is made of
Chrome steel
Mild steel
Stainless steel
Alcino
Chrome steel
Mild steel
Stainless steel
Alcino
Answer
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