Computer Programming MCQs — Test 30
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Question 1
In a synchronous motor running with fixed excitation, when the load is increased three times, its torque angle becomes approximately
Question 2
Which of the following methods is used to start a synchronous motor?
Question 3
Power factor of a synchronous motor is unity when_____________?
Question 4
Which of the following motors will be used in electric clocks?
Question 5
A synchronous motor installed at the receiving end substation operates with such an excitation that it takes power at lagging power factor. Now if the applied voltage of the synchronous motor goes down, the power factor of the synchronous motor will___________?
Question 6
While starting a salient pole synchronous motor by induction motor action and connecting field discharge resistance across field, starting and accelerating torque is produced by_____________?
Question 7
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____________?
Question 8
Stability of a synchronous machine:
Question 9
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
Question 10
A synchronous motor is running with normal excitation. When the load is increased, the armature current drawn by it increases because