The purpose of retardation test on D.C. shunt machines is to find out____________?

Related Mcqs:

A direct on line starter is used: for starting motors___________?

A. up to 5 H.P B. up to 10 H.P C. up to 15 H.P D. up to 20 H.P...

The ratio of starting torque to full-load torque is least in case of____________?

A. series motors B. shunt motors C. compound motors D. none of the above...

Buses, trains, trolleys, hoists, cranes require high starting torque and therefore make use of_____________?

A. D.C. series motor B. D.C. shunt motor C. induction motor D. all of above motors...

If a D.C. motor designed for 40°C ambient temperature is to be used for 50°C ambient temperature, then the motor_____________?

A. of lower H.P. should be selected B. of higher H.P. should be selected C. can be used for 50°C ambient temperature also D. is to be derated by a factor recommended by manufacturer and select the next higher H.P. motor...

Which method of braking is generally used in elevators ?

A. Plugging B. Regenerative braking C. Rheostatic braking D. None of the above...