Top 150+ Solved Electrical Drives and Controls (EDC) MCQ Questions Answer

From 136 to 150 of 152

Q. The value of slip at which maximum torque occurs  

a. r2÷x2

b. 4r2÷x2

c. 2r2÷x2

d. r2÷3x2

  • a. r2÷x2

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

  • c. fixed ac to variable ac

Q.   devices were used for voltage control applications.

a. cycloconverters

b. vacuum tubes

c. tap changing transformer

d. induction machine

  • c. tap changing transformer

Q.   applications.

a. power generation

b. electric heating

c. conveyor belt motion

d. power transmission

  • b. electric heating

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

  • b. control is achieved by adjusting the firing angle of the devices

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

  • b. one scr is anti parallel with one diode

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

  • a. half wave controller

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

  • b. full wave controller

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

  • c. both the cycles can be controlled

Q. Which motor is preferred for Jaw crushers?

a. wrim

b. scim

c. belt slip ring im

d. dc shunt motor

  • c. belt slip ring im

Q. Full form of THD is                          

a. total harmonic diverter

b. total harmonic digital

c. total harmonic distortion

d. total harmonic discrete

  • c. total harmonic distortion

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 %

  • a. 45.8 %

Q. Calculate the value of THD if the distortion factor is .8.

a. 76 %

b. 75 %

c. 74 %

d. 73 %

  • b. 75 %

Q. Full form of VRF.

a. voltage ripple factor

b. voltage revert factor

c. volume ripple factor

d. volume revert factor

  • a. voltage ripple factor
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