Characteristics of DC Motors MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Characteristics of 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 Characteristics of DC Motors MCQs are designed to help you grasp the core concepts and excel in solving problems.

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Characteristics of DC Motors MCQs | Page 6 of 6

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Q51.
Where speed-current characteristic of DC shunt motor lies with respect to DC cumulative compound motor (assume current greater than full load current)?

a.

Can be represented by same curve

b.

Above

c.

Below

d.

Cannot be determined

Discuss
Answer: (b).Above
Q52.
Where speed-current characteristic of DC shunt motor lies with respect to DC cumulative compound motor (assume current smaller than full load current)?

a.

Can be represented by same curve

b.

Above

c.

Below

d.

Cannot be determined

Discuss
Answer: (c).Below
Q53.
Only motor listed below whose speed increases with increase in armature current is ___________

a.

DC series motor

b.

DC cumulative compound motor

c.

DC shunt motor

d.

DC differential compound motor

Discuss
Answer: (d).DC differential compound motor
Q54.
Torque of the cumulative compound DC motor is _____________

a.

Addition of Ia and Ia² term

b.

Subtraction of Ia from Ia² term

c.

Subtraction of Ia² from Ia term

d.

Addition of -Ia and -Ia² term

Discuss
Answer: (a).Addition of Ia and Ia² term
Q55.
Torque-current characteristic of DC cumulative compound motor _____________

a.

Lies above shunt motor characteristic

b.

Lies below shunt motor characteristic

c.

Lies above of series and shunt motor characteristic both

d.

Lies between of series and shunt motor characteristic both

Discuss
Answer: (c).Lies above of series and shunt motor characteristic both
Q56.
For strong series field, speed-torque characteristic of cumulative compound motor lies __________

a.

Above series motor characteristic if current is less than full load current

b.

Above shunt motor characteristic if current is less than full load current

c.

Below series motor characteristic if current is more than full load current

d.

Below series motor characteristic if current is less than full load current

Discuss
Answer: (b).Above shunt motor characteristic if current is less than full load current
Q57.
Which of the following DC motor has negative speed regulation?

a.

Shunt motors

b.

Series motors

c.

Differential compound motors

d.

Series and differential compound motors

Discuss
Answer: (c).Differential compound motors
Q58.
Correct equation of speed-torque characteristic of DC shunt motor is____________

a.

a

b.

b

c.

c

d.

d

Discuss
Answer: (a).a
Q59.
Which of the following is the correct equation for DC series motor ________

a.

a

b.

b

c.

c

d.

d

Discuss
Answer: (a).a
Q60.
Net field current in a compound motor is given by ______________

a.

a

b.

b

c.

c

d.

d

Discuss
Answer: (a).a
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