Explore topic-wise MCQs in Electric Drives.

This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Electric Drives knowledge and support exam preparation. Choose a topic below to get started.

1.

Calculate mark to space ratio if the system is on for 5 sec and off for 10 sec.

A. .5
B. .4
C. .2
D. .6
Answer» D. .6
Discussion
2.

The slope of the V-I curve is 60 . Calculate the value of resistance. Assume the relationship between voltage and current is a straight line.

A. 1.732
B. 1.608
C. 1.543
D. 1.648
Answer» B. 1.608
Discussion
3.

Calculate the value of the frequency if the time period of the signal is 20 sec.

A. 0.05 Hz
B. 0.04 Hz
C. 0.02 Hz
D. 0.03 Hz
Answer» B. 0.04 Hz
Discussion
4.

Which of the theorems helps in the calculation of the moment of inertia?

A. The theorem of Parallel and Perpendicular axes
B. The theorem of Horizontal and Perpendicular axes
C. The theorem of Vertical and Perpendicular axes
D. The theorem of Parallel and Tilted axes
Answer» B. The theorem of Horizontal and Perpendicular axes
Discussion
5.

Calculate the moment of inertia of the egg having a mass of 7 kg and radius of 44 cm.

A. .968 kgm<sup>2</sup>
B. 1.454 kgm<sup>2</sup>
C. 1.545 kgm<sup>2</sup>
D. 1.552 kgm<sup>2</sup>
Answer» E.
Discussion
6.

The unit of the moment of inertia is Kgm2.

A. True
B. False
Answer» B. False
Discussion
7.

The generated e.m.f from 50-pole armature having 400 conductors driven at 20 rev/sec having flux per pole as 30 mWb, with lap winding is ___________

A. 230 V
B. 140 V
C. 240 V
D. 250 V
Answer» D. 250 V
Discussion
8.

What is the formula for the moment of inertia? (m a mass of the body, r distance from the axis of the rotation)

A. m<sub>i</sub>r<sub>i</sub><sup>2</sup>
B. m<sub>i</sub>r<sub>i</sub>
C. m<sub>i</sub>r<sub>i</sub><sup>4</sup>
D. m<sub>i</sub>r<sub>i</sub><sup>3</sup>
Answer» B. m<sub>i</sub>r<sub>i</sub>
Discussion