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.

Choose the correct representation for the time phasor below.

A. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-quiz-q6.png"><img alt="The correct representation for the time phasor below - option a" class="alignnone size-full wp-image-160906" height="197" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-quiz-q6.png" width="300"/></a>
B. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-quiz-q12b.png"><img alt="The correct representation for the time phasor below - option b" class="alignnone size-full wp-image-160908" height="167" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-quiz-q12b.png" width="288"/></a>
C. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-quiz-q12c.png"><img alt="The correct representation for the time phasor below - option c" class="alignnone size-full wp-image-160909" height="194" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-quiz-q12c.png" width="119"/></a>
D. all of the mentioned
Answer» E.
Discussion
2.

Potier method is very accurate due to __________

A. emfs are handled as voltage and mmf as AT
B. emf and mmf are handled as AT
C. emf and mmf are handled as voltage
D. none of the mentioned
Answer» B. emf and mmf are handled as AT
Discussion
3.

The leakage reactance can be determined with lesser accuracy by using Potier triangle.

A. True
B. False
Answer» C.
Discussion
4.

The short circuit characteristic of alternator is a straight line due to __________

A. no saturation
B. no armature reaction
C. no eddy current
D. all of the mentioned
Answer» B. no armature reaction
Discussion
5.

The load angle is between __________

A. Ef and Ia
B. Ia and field flux
C. Ef and Vt
D. Vt and Ia
Answer» D. Vt and Ia
Discussion
6.

The internal power factor angle is between __________

A. Ef and Ia
B. Ia and field flux
C. Ef and Vt
D. Vt and Ia
Answer» B. Ia and field flux
Discussion
7.

If the resultant flux will not be in phase with the resultant mmf Fr. This is due to __________

A. hysteresis effect
B. armature reaction
C. hysteresis effect and armature reaction
D. eddy currents
Answer» B. armature reaction
Discussion