Top 250+ Solved Control of Electric Drives MCQ Questions Answer
Q. The equilibrium speed of a motor load system is obtained
a. when motor torque equals the load torque
b. when motor torque is less than the load torque
c. when motor torque is more than the load torque
d. none of the these.
Q. Most commonly used ac motor is
a. Synchronous motor
b. Slip ring induction motor
c. Squirrel cage induction motor
d. ac commutator induction motor.
Q. The motor commonly used in computers and digital systems is
a. dc shunt motor
b. Induction motor
c. Stepper motor
d. Synchronous motor.
Q. Regenerative braking mode can be achieved in which quadrant (V-I curve)?
a. Third
b. Second
c. Fourth
d. First
Q. Fan type of loads exhibits which type of load torque characteristics?
a. Constant torque characteristics
b. Linearly rising torque characteristics
c. Non-Linearly rising torque characteristics
d. Non-Linearly decreasing torque characteristics
Q. Type-A chopper is used for obtaining which type of mode?
a. Motoring mode
b. Regenerative braking mode
c. Reverse motoring mode
d. Reverse regenerative braking mode
Q. Boost converter is used to _________
a. Step down the voltage
b. Step up the voltage
c. Equalize the voltage
d. Step up and step down the voltage
Q. Which one is an example of variable loss?
a. Windage loss
b. Hysteresis loss
c. Armature copper loss
d. Friction loss
Q. Rolling mills exhibit what type of load torque characteristics?
a. Constant torque characteristics
b. Linearly rising torque characteristics
c. Non-Linearly rising torque characteristics
d. Non-Linearly decreasing torque characteristics
Q. What is the relationship between torque and speed in constant type loads?
a. Torque is independent of speed
b. Torque linearly increases with increase in speed
c. Torque non-linearly increases with an increase in speed
d. Torque non-linearly decreases with an increase in speed
Q. Torque inversely varies with the speed in the windage load torque component.
a. True
b. False
c. none
d. all
Q. What type of force handles for active torques?
a. Strong nuclear forces
b. Weak nuclear forces
c. Gravitational forces
d. Electrostatic forces