Top 150+ Solved Electrical Drives and Controls (EDC) MCQ Questions Answer
Q. AC voltage controllers convert
a. fixed ac to fixed dc
b. variable ac to variable dc
c. fixed ac to variable ac
d. variable ac to fixed ac
Q. devices were used for voltage control applications.
a. cycloconverters
b. vacuum tubes
c. tap changing transformer
d. induction machine
Q. applications.
a. power generation
b. electric heating
c. conveyor belt motion
d. power transmission
Q. In the principle of phase control
a. the load is on for some cycles and off for some cycles
b. control is achieved by adjusting the firing angle of the devices
c. control is achieved by adjusting the number of on off cycles
d. control cannot be achieved
Q. consists of
a. one scr is parallel with one diode
b. one scr is anti parallel with one diode
c. two scrs in parallel
d. two scrs in anti parallel
Q. The below shown controller circuit is a
a. half wave controller
b. full wave controller
c. none of the mentioned
d. will depend upon the firing angle
Q. The below given controller circuit is a
a. half wave controller
b. full wave controller
c. none of the mentioned
d. will depend upon the firing angle
Q. circuit
a. only the negative cycle can be controlled
b. only the positive cycle can be controlled
c. both the cycles can be controlled
d. none of the mentioned
Q. Which motor is preferred for Jaw crushers?
a. wrim
b. scim
c. belt slip ring im
d. dc shunt motor
Q. Full form of THD is
a. total harmonic diverter
b. total harmonic digital
c. total harmonic distortion
d. total harmonic discrete
Q. Calculate the value of Voltage ripple factor if the Form factor is 1.1.
a. 45.8 %
b. 46.2 %
c. 47.5 %
d. 49.9 %
Q. Full form of VRF.
a. voltage ripple factor
b. voltage revert factor
c. volume ripple factor
d. volume revert factor
Q. The flux and the internally generated voltage of a dc machine is a function of its magneto-motive force.
a. non-linear
b. linear
c. constant
d. inverse