Question

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

I got this question in an interview for job.

My question is based upon Dynamics in division Dynamics of Electrical Drives of Electric Drives

Answer 1

Correct answer is (a) Torque is independent of speed

Explanation: Speed hoist is a perfect example of constant type loads in which torque variation is independent of speed. The speed-torque characteristics of this type of load are given by T=K where K is a constant.