Explore topic-wise MCQs in Dc Machines.

This section includes 5 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.

In shunted rheostatic armature control method ______________

A. Variable resistor is added in parallel with armature
B. Variable resistor is added in series with armature
C. Variable resistor is added in parallel with armature and another variable resistor is added in series
D. Variable resistor is not added in whole circuit
Answer» D. Variable resistor is not added in whole circuit
Discussion
2.

Speed regulation of armature series control method is __________

A. Very good
B. Zero
C. Poor
D. Cannot comment
Answer» D. Cannot comment
Discussion
3.

Consider the armature control method, where 10 resistance is connected in series with armature in first case. For second case resistance value is changed 100 . Then ____________

A. Speed-torque characteristic of both will start from same point
B. For first case speed-torque characteristic will start below to the case 2
C. For first case speed-torque characteristic will start above to the case 2
D. Can t say because other parameters are unavailable
Answer» B. For first case speed-torque characteristic will start below to the case 2
Discussion
4.

By series armature resistance method, we can get _________________________

A. Speed above rated speed
B. Speed equal to rated speed
C. Speed below rated speed
D. All speeds are possible
Answer» D. All speeds are possible
Discussion
5.

For which speed control method we get minimum efficiency?

A. Voltage control method
B. Field control method
C. Armature control method
D. Cannot be determined
Answer» D. Cannot be determined
Discussion