Which one of the following is not the function of pole shoes in a D.C. machine ?

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...

If a D.C. shunt motor is working at no load and if shunt field circuit suddenly opens__________?

A. nothing will happen to the motor B. this will make armature to take heavy current, possibly burning it C. this will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses D. motor will run at very slow speed...

Which of the following motor has the poorest speed regulation ?

A. Shunt motor B. Series motor C. Differential compound motor D. Cumulative compound motor...

Regenerative method of braking is based on that___________?

A. back e.m.f. is less than the applied voltage B. back e.m.f. is equal to the applied voltage C. back e.m.f. of rotor is more than the applied voltage D. none of the above...

During rheostat braking of D.C. series motors_____________?

A. motor is run as a generator B. motor is reversed in direction C. motor is run at reduced speed...