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 1 of 5

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Q1.
In a DC machine, the form of armature mmf waveform is __________
Discuss
Answer: (a).Triangular
Discuss
Answer: (a).Axes of main poles
Q3.
In a DC machine, the form of flux density distribution (main field only) waveform is __________
Discuss
Answer: (d).Trapezoidal
Q4.
Due to the effect of armature reaction in DC machine, the flux per pole and generated voltage ______ and ________ respectively.
Discuss
Answer: (b).Decreases, decreases
Q5.
Armature reaction of an unsaturated DC machine is (in terms of magnetization) ________
Discuss
Answer: (a).Cross-magnetizing
Q6.
What is the effect of demagnetizing component of armature reaction?
Discuss
Answer: (a).Reduces generator emf
Discuss
Answer: (d).Insulation failure between two commutator bars, two turns of a coil or the same coil getting grounded
Discuss
Answer: (a).Demagnetisation of leading pole tip and magnetisation of trailing pole tip
Q9.
In DC generator, how armature reaction is produced?
Discuss
Answer: (d).Load current in armature
Q10.
In a DC generator, the effect of armature reaction on the main pole flux is to _________
Discuss
Answer: (d).Reduce and distort it
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