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 2 of 4

Discover more Topics under DC Machines

Q11.
For a given 4-pole machine, carrying armature current 56.82 A, with 846 conductors. The mean flux density in the air gap under the interpoles is 0.5 Wb/m² on full load and radial gap length is 0.3 cm. Ampere-turns required for an interpole is ____________
Discuss
Answer: (c).4198
Q12.
A 440 V, 4-pole, 25 kW, dc generator has a wave-connected armature winding with 846 conductors. The mean flux density in the air-gap under the interpoles is 0.5 Wb/m² on full load and the radial gap length is 0.3 cm. Number of turns required on each interpole is _________
Discuss
Answer: (a).74
Q13.
To achieve spark less commutation brushes of a DC generator are placed ________
Discuss
Answer: (a).just ahead of magnetic neutral axis
Q14.
If in the DC machine, the reversal of current in the coil is faster than ideal or linear commutation then the commutation is said to be __________ commutation.
Discuss
Answer: (c).Accelerated
Discuss
Answer: (c).Mica is harder than copper
Q16.
The insulating material used between the commutator segments is normally _______
Discuss
Answer: (d).Mica
Discuss
Answer: (c).Increase in acceleration of commutation
Q18.
The main function of interpoles in a loaded DC machine is to minimize _______between the brushes and the commutator.
Discuss
Answer: (b).Sparking
Q19.
Which of the following is different component?
Discuss
Answer: (d).Compensating winding
Q20.
How many coils under an adjoining pole pairs is/are connected between adjacent commutator segments in lap winding?
Discuss
Answer: (c).1
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