Speed control by Ward Leonard method gives uniform speed variation_____________?

Related Mcqs:

If a D.C. motor is to be selected for conveyors, which rriotor would be preferred ?

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

The speed of a D.C. series motor is_____________?

A. proportional to the armature current B. proportional to the square of the armature current C. proportional to field current D. inversely proportional to the armature current...

In D.C. machines the residual magnetism is of the order of_________________?

A. 2 to 3 per cent B. 10 to 15 per cent C. 20 to 25 per cent D. 50 to 75 per cent...

For constant torque drive which speed control method is preferred ?

A. Field control B. Armature voltage control C. Shunt armature control D. Mechanical loading system...

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...