Top 250+ Solved Control of Electric Drives MCQ Questions Answer
Q. Which of the following motor is preferred for blowers ?
a. wound rotor induction motor
b. squirrel cage induction motor
c. dc shunt motor
d. dc series motor.
Q. Centrifugal pumps are usually driven by
a. dc shunt motors
b. dc series motors
c. squirrel cage induction motors
d. any of the above.
Q. In case of centrifugal pumps the starting torque is generally
a. double the running torque
b. slightly more than running torque
c. same as running torque
d. less than running torque.
Q. In a centrifugal pump if the liquid to be pumped has density twice that of water, then the horse power required(as compared to that while pumping water) will be
a. half
b. same
c. double
d. four times.
Q. Wound rotor and squirrel-cage motors with high slip which develop maximumtorque at stand still are used for
a. machine tools
b. presses and punches
c. elevators
d. all of the above.
Q. Belted slip ring induction motor is almost invariably used for
a. centrifugal blowers
b. jaw crushers
c. water pumps
d. screw pumps.
Q. A solar cell converts light energy into __________
a. Electrical energy
b. Thermal energy
c. Sound energy
d. Heat energy
Q. The output power of the centrifugal pump is proportional to the _________ of the speed.
a. Square
b. Cube
c. Square-root
d. Cube-root
Q. Which of the following is an advantage of electric traction over other methods oftraction ?
a. Faster acceleration
b. No pollution problems
c. Better braking action
d. All of the above
Q. Which of the following is the voltage for single phase A.C. system ?
a. 22 V
b. 440 V
c. 5 kV
d. 15 kV