Commutation Process and Excitation Methods MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Commutation Process and Excitation Methods, a fundamental topic in the field of DC Machines. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Commutation Process and Excitation Methods MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Commutation Process and Excitation Methods mcq questions that explore various aspects of Commutation Process and Excitation Methods problems. Each MCQ is crafted to challenge your understanding of Commutation Process and Excitation Methods principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace DC Machines tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Commutation Process and Excitation Methods MCQs are your pathway to success in mastering this essential DC Machines topic.

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Commutation Process and Excitation Methods MCQs | Page 4 of 4

Q31.
In which type of excitation air gap flux increases with armature current?
Discuss
Answer: (b).Cumulative compound
Q32.
In differential compound excited machine, what is the variation in air gap flux per pole with respect to armature current?
Discuss
Answer: (b).Decreases
Q33.
Which winding in compound excitation is responsible for change in air gap flux per pole?
Discuss
Answer: (a).Series
Q34.
How short shunt and long shunt compound winding is selected?
Discuss
Answer: (d).Mechanical considerations and switch reversal
Q35.
If a DC compound machine connected as a motor is about to use as a generator, we reverse the series field connections.
Discuss
Answer: (a).True
Q36.
For a long-shunt compound motoring, which of the following equation is correct?
Discuss
Answer: (a).Vₜ= Eₐ+ Iₐ(Rₐ+ Rₛₑ)
Discuss
Answer: (b).Short shunt compound generating mode
Discuss
Answer: (c).Series regulating resistance
Discuss
Answer: (a).The series field ampere turns are such as to produce the same voltage at rated load as at no load
Q40.
Formula for cancellation of reactance voltage on an average basis using interpoles ________

a.

a

b.

b

c.

c

d.

d

Discuss
Answer: (a).a
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