Electrical Engineering Mcqs — Test 28
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Question 1
A synchronous motor develops maximum power when load angle is____________?
Question 2
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_____________?
Question 3
Hunting in a synchronous motor cannot be due to___________?
Question 4
In a synchronous motor, the magnitude of stator back e.m.f. Eb depends on___________?
Question 5
The effect of increasing the load on a synchronous motor running with normal excitation is to___________?
Question 6
In a synchronous motor, the maximum power developed depends on all of the following except:
Question 7
The maximum speed variation in a 3-phase synchronous motor is____________?
Question 8
If one-phase of a 3-phase synchronous motor is short-circuited, motor will ______________?
Question 9
The power factor of a synchronous motor is better than that of induction motor because
Question 10
Armature of a synchronous machine is____________?