Explore topic-wise MCQs in Electric Drives Questions and Answers.

This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Electric Drives Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.

1.

Calculate the shaft power developed by a motor using the given data: Eb = 50V and I = 60 A. Assume frictional losses are 400 W and windage losses are 600 W.

A. 4000 W
B. 2000 W
C. 1000 W
D. 1500 W
Answer» C. 1000 W
Discussion
2.

Calculate the value of the angular acceleration of the motor using the given data: J= 50 kg-m2, load torque = 40 N-m, motor torque = 10 N-m.

A. -.7 rad/s2
B. -.6 rad/s2
C. -.3 rad/s2
D. -.4 rad/s2
Answer» C. -.3 rad/s2
Discussion
3.

The unit of angular acceleration is rad/s2.

A. True
B. False
Answer» B. False
Discussion
4.

A 220 V, 1000 rpm, 60 A separately-excited dc motor has an armature resistance of .5 ω. It is fed from single-phase full converter with an ac source voltage of 230 V, 50Hz. Assuming continuous conduction, the firing angle for rated motor torque at (-400) rpm is _________

A. 122.4°
B. 117.6°
C. 130.1°
D. 102.8°
Answer» E.
Discussion