A synchronous motor which works on a leading power factor and does not drive a mechanical load is called as
Select an option to see the answer and solution.
Electrical Engineering · all questionsSynchronous Motors
Synchronous Motors
practice.
Practice every MCQ with options. Use Show answers when you want the correct option and solution.
120
Questions
2/6
Page
Pick an option on a question to see the right answer and solution.
For V-curves for a synchronous motor the graph is drawn between
Select an option to see the answer and solution.
The armature current of the synchronous motor has higher values for
Select an option to see the answer and solution.
In which of the following motors the stator and rotor fields rotate simultaneously ?
Select an option to see the answer and solution.
A rotory converter can also be run as a
Select an option to see the answer and solution.
The oscillations in a synchronous motor can be damped out by
Select an option to see the answer and solution.
A synchronous motor can be used as a synchronous capacitor when it is
Select an option to see the answer and solution.
Slip-rings in a synchronous motor carry
Select an option to see the answer and solution.
An over-excited synchronous motor takes
Select an option to see the answer and solution.
While starting a synchronous motor by induction motor action, field winding is usually
Select an option to see the answer and solution.
A synchronous motor is running on a load with normal excitation. Now if the load on the motor is increased
Select an option to see the answer and solution.
To limit the operating temperature an electrical machine should have proper
Select an option to see the answer and solution.
In a synchronous motor, the magnitude of stator back e.m.f. (Eb) depends on
Select an option to see the answer and solution.
In a synchronous motor, the magnitude of stator back e.m.f. Eb depends on
Select an option to see the answer and solution.
If excitation of a synchronous motor running with a constant load is decreased from its normal value, ignoring effects of armature reaction, it leads to
Select an option to see the answer and solution.
If load (or torque) angle of a 4-pole synchronous motor is 6° electrical, its value in mechanical degrees is
Select an option to see the answer and solution.
In a synchronous motor running with fixed excitation, when the load is increased three times, its torque angle becomes approximately
Select an option to see the answer and solution.
If in a synchronous motor, driving a given mechanical load and drawing current at a leading power factor from constant voltage supply its field excitation is increased, its power factor
Select an option to see the answer and solution.
Synchronous motors are generally not self-starting because
Select an option to see the answer and solution.
The synchronous motor is not inherently self-starting because
Select an option to see the answer and solution.