DC MOTOR 1

A detailed illustration of a DC motor, showcasing its components (armature, field, etc.) and an infographic-style background that includes applications like elevators, trains, and machinery.

DC Motor Quiz

Test your knowledge about DC motors and their applications with this insightful quiz! Whether you are a student, teacher, or just an enthusiast, this quiz provides an engaging way to deepen your understanding of DC motors.

Key Features:

Multiple-choice questions
Covers various applications and principles of DC motors
Learn while you quiz!

10 Questions2 MinutesCreated by RunningCurrent405

1. The direction of rotation of a D.C.series motor can be changed by __________.

Interchanging supply terminals

Interchanging field terminals

Interchanging armature and field terminals

None of the above

2. Which of the following application requires high starting torque?

Lathe machine

Centrifugal pump

Locomotive

Air blower

3. Which D.C.motor will be preferred for constant speed line shafting?

Cumulative compound motor

Differential compound motor

Shunt motor

Series motor

4. Which D.C.motor is preferred for elevators?

Shunt motor

Series motor

Differential compound motor

Cumulative compound motor

5. According to Fleming’s left-hand rule, when the fore finger points in the direction of the field or flux, the middle finger will point in the direction of ____________.

Current of conductor

Movement of conductor

Resultant force of conductor

None of the above

6. If the field of a D.C.shunt motor gets opened while motor is running ___________.

The speed of the motor will be reduced

The armature current will be reduced

The motor will attain dangerously high speed

D. The motor will continue to run at constant speed

7. What will happen if the back e.m.f., of a D.C.motor vanished suddenly?

The motor will stop

B. The motor will continue to run

The armature may burn

The motor will run noisy

8. In case of D.C.shunt motors, the speed is dependent on back e.m.f., only because ______.

Back e.m.f., is equal to armature drop

Armature drop is ngligible

Flux is proportional to armature current

Flux is practically constant in DC shunt motors

9. If the speed of a D.C.shunt motor is increased, the back e.m.f., of the motor will _______

Decrease

Increase

Remains same

Become zero

10. These days D.C.motors are widely used in ______________.

Pumping sets

Air compressors

Electric traction

Machine shops

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