Armature Reaction MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Armature Reaction, 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 Armature Reaction 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 Armature Reaction mcq questions that explore various aspects of Armature Reaction problems. Each MCQ is crafted to challenge your understanding of Armature Reaction 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 Armature Reaction MCQs are your pathway to success in mastering this essential DC Machines topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Armature Reaction. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Armature Reaction knowledge to the test? Let's get started with our carefully curated MCQs!

Armature Reaction MCQs | Page 2 of 5

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Q11.
In a DC machine brushes are normally located along GNA.
Discuss
Answer: (a).True
Q12.
Armature reaction at 90° to the main field is called as ____________
Discuss
Answer: (c).Anti-magnetizing mmf
Q13.
Increase in flux density at one end of the pole is less than the decrease at the other end. This is called as ____________
Discuss
Answer: (a).Demagnetizing mmf
Discuss
Answer: (a).ATₐ (peak) = Atₐ (total) /P
Q15.
Flux density in the interpolar region drops down because of ______
Discuss
Answer: (b).Large air gap
Q16.
Which axis undergo shifting as a result of armature reaction?
Discuss
Answer: (b).MNA
Discuss
Answer: (a).Machine is designed with iron which is slightly saturated
Discuss
Answer: (d).Increase in iron losses, commutation problems and commutator sparking
Q19.
A 250 kW, 400 V, 6-pole dc generator has 720 lap wound conductors. Armature current is ____
Discuss
Answer: (a).625 A
Q20.
What is the total ampere conductors/pole (in SI) if 600 lap wound conductors carry 120 A current through conductors (P=4)?
Discuss
Answer: (a).18000
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