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 3 of 5

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Q21.
What is the total ampere turns/pole (in AT/pole) if 600 lap wound conductors carry 120 A current through conductors (P=4)?
Discuss
Answer: (b).9000
Q22.
If total ampere turns per pole is equal to 6000 A-turns, peak ampere turns for a 4-pole machine is _____
Discuss
Answer: (c).1500
Q23.
What is the total ampere turns per pole for 720 lap wounded conductors with carrying armature current equal to 625 A in a 6-pole machine?
Discuss
Answer: (a).6252 AT/pole
Q24.
For 6252 AT/Poles, if brush shift is of 2.50 mech. Degrees, what will be the demagnetizing ampere-turns per pole for a 6-pole DC machine?
Discuss
Answer: (a).521
Q25.
For 6252 AT/Poles, if brush shift is of 2.50 mech. Degrees, what will be the cross-magnetizing ampere-turns per pole for a 6-pole DC machine?
Discuss
Answer: (b).5731
Q26.
The armature reaction in a DC machine causes distortion in the main field flux. Effect of armature reaction can be reduced by_________
Discuss
Answer: (b).Decreasing the length of air gap
Discuss
Answer: (b).Equal to the total armature ampere conductors under the pole shoe
Discuss
Answer: (a).(pole arc / pole pitch) * armature ampere turns per pole
Discuss
Answer: (a).Only wave winding
Q30.
Inequality in brush arm currents caused due to different emf induced in different parallel paths may give rise to copper losses. These effects can be avoided by using _________
Discuss
Answer: (c).Equalizer rings
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