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.

Which one of the following is the base reason to place field on rotor in the alternator?

A. Small power in field circuit
B. Insulation of high voltage is made easy on stator than on rotor
C. Huge power in stator
D. Large current in the stator
Answer» C. Huge power in stator
Discussion
2.

In a salient pole synchronous machine the air gap is least under the middle of the pole shoe and increases outwards.

A. True
B. False
Answer» B. False
Discussion
3.

(i) Transient stability is lower than SSSL. (ii) Transient disturbances are more common.

A. i and ii both are true
B. i false, ii true
C. i true, ii false
D. Both are false
Answer» B. i false, ii true
Discussion
4.

Transient stability limit is less important than SSSL.

A. True
B. False
Answer» C.
Discussion
5.

Series capacitors will improve the ___________

A. SSSL
B. Transient stability
C. Hunting
D. Stiffness
Answer» B. Transient stability
Discussion
6.

If the load angle is increased till 135 , the consequence will be ___________

A. loss of synchronism
B. no alternation of synchronism
C. increase in stability limit
D. reduction in stability limit
Answer» B. no alternation of synchronism
Discussion
7.

Steady state stability limit is defined as maximum power flow possible through a particular point without loss of stability when the ___________

A. power is increased gradually
B. power is increased suddenly
C. power is reduced gradually
D. power is reduces suddenly
Answer» B. power is increased suddenly
Discussion