DC MOTOR 1
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!
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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