DC Motors MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on DC Motors, 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 DC Motors 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 DC Motors mcq questions that explore various aspects of DC Motors problems. Each MCQ is crafted to challenge your understanding of DC Motors 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 DC Motors 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 DC Motors. 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 DC Motors knowledge to the test? Let's get started with our carefully curated MCQs!

DC Motors MCQs | Page 11 of 13

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Q101.
Ward Leonard method is an ideal choice for motor which undergoes frequent starting, stopping, speed reversal.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q102.
Starting gear used in Ward Leonard method___________

a.

Is of small size

b.

Is of large size

c.

Size depends on application

d.

Is absent

Discuss
Answer: (d).Is absent
Q103.
To get the speed of DC motor below the normal speed without wastage of electrical energy we use __________________

a.

Ward Leonard control

b.

Rheostatic control

c.

Any of the Ward Leonard or rheostatic method can be used

d.

Not possible

Discuss
Answer: (a).Ward Leonard control
Q104.
Speed control by Ward Leonard method, can give uniform speed variation _______________

a.

In both directions

b.

In one direction

c.

Below normal speed only

d.

Above normal speed only.

Discuss
Answer: (a).In both directions
Q105.
Ward Leonard control is basically a _____________

a.

Voltage control method

b.

Field diverter method

c.

Field control method

d.

Armature resistance control method

Discuss
Answer: (a).Voltage control method
Q106.
In Ward Leonard control of DC motor, the lower limit of speed is imposed by ____________

a.

Residual magnetism of the generator

b.

Core losses of motor

c.

Mechanical losses of motor and generator together

d.

Cannot be determined

Discuss
Answer: (a).Residual magnetism of the generator
Q107.
The disadvantage of the Ward Leonard control method is ___________

a.

High initial cost

b.

High maintenance cost

c.

Low efficiency at high loads

d.

High cost, high maintenance and low efficiency

Discuss
Answer: (d).High cost, high maintenance and low efficiency
Q108.
Which of the following is the best braking method?

a.

Friction

b.

Electromechanical action

c.

Eddy-currents

d.

Electric braking

Discuss
Answer: (d).Electric braking
Q109.
DC motor is still widely used in tractions due to its excellent braking properties.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
Q110.
Which of the following is not the method of electrical braking?

a.

Plugging or counter-current

b.

Dynamic or rheostatic

c.

Regenerative

d.

Eddy current

Discuss
Answer: (d).Eddy current
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