Explore topic-wise MCQs in Dc Machines.

This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Dc Machines knowledge and support exam preparation. Choose a topic below to get started.

1.

Vt= Ea Ia(Ra+ Rse) is the equation for _______________

A. Short shunt compound motoring mode
B. Short shunt compound generating mode
C. long shunt compound motoring mode
D. Cannot be determined
Answer» C. long shunt compound motoring mode
Discussion
2.

For a long-shunt compound motoring, which of the following equation is correct?

A. V<sub>t</sub>= E<sub>a</sub>+ I<sub>a</sub>(R<sub>a</sub>+ R<sub>se</sub>)
B. V<sub>t</sub>= E<sub>a</sub> I<sub>a</sub>(R<sub>a</sub>+ R<sub>se</sub>)
C. V<sub>t</sub>= E<sub>a</sub>+ I<sub>a</sub>(R<sub>a</sub> R<sub>se</sub>)
D. V<sub>t</sub>= -E<sub>a</sub>+ I<sub>a</sub>(R<sub>a</sub>+ R<sub>se</sub>)
Answer» B. V<sub>t</sub>= E<sub>a</sub> I<sub>a</sub>(R<sub>a</sub>+ R<sub>se</sub>)
Discussion
3.

If a DC compound machine connected as a motor is about to use as a generator, we reverse the series field connections.

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

How short shunt and long shunt compound winding is selected?

A. Mechanical considerations
B. Switch reversal
C. Performance
D. Mechanical considerations and switch reversal
Answer» E.
Discussion