Explore topic-wise MCQs in Electrical Machines.

This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Machines knowledge and support exam preparation. Choose a topic below to get started.

1.

A 3-phase synchronous alternator is connected to the infinite bus is over excited, that corresponds to ______________

A. capacitor
B. inductor
C. variable inductor
D. any of the mentioned
Answer» B. inductor
Discussion
2.

An alternator is to be used for generation purpose in an aircraft. The most suited operating frequency of the alternator should be ____________

A. of 400 Hz to remove extra bulk
B. of 400 Hz to reduce losses
C. of 50 Hz to remove extra bulk
D. none of the mentioned
Answer» B. of 400 Hz to reduce losses
Discussion
3.

In a single phase induction regulator, the voltage boost is maximum when armature mmf and rotor mmf make an angle of ____________

A. zero degrees
B. 45 degrees
C. 90 degrees
D. 180 degrees
Answer» B. 45 degrees
Discussion
4.

If it asked by the customer to provide tappings on the transformer, the most efficient and economical way to provide it at ____________

A. middle of hv winding
B. phase end of hv winding
C. neutral end of hv winding
D. middle of lv winding
Answer» B. phase end of hv winding
Discussion
5.

The dc series generator is employed as ____________

A. a booster to maintain constant voltage at the end of the feeder
B. for supplying traction load
C. for battery bank charging
D. none of the mentioned
Answer» B. for supplying traction load
Discussion
6.

The most widely used application of ac series motor is ____________

A. electric traction upto 1600 kW
B. paper mills
C. welding
D. none of the mentioned
Answer» E.
Discussion
7.

Synchronous-induction coupled motors are required for ____________

A. high starting torque applications
B. high pull out torque applications
C. high running torques applications
D. none of the mentioned
Answer» B. high pull out torque applications
Discussion