For constant torque drive which speed control method is preferred ?

Related Mcqs:

Which D.C. motor will be preferred for machine tools ?

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

The speed of a D.C. shunt motor more than its full-load speed can be obtained by_____________?

A. decreasing the field current B. increasing the field current C. decreasing the armature current D. increasing the armature current...

The current drawn by the armature of D.C. motor is directly proportional to__________?

A. the torque required B. the speed of the motor C. the voltage across the terminals D. none of the above...

The speed of a D.C. shunt motor can be increased by_______________?

A. increasing the resistance in armature circuit B. increasing the resistance in field circuit C. reducing the resistance in the field circuit D. reducing the resistance in the armature circuit...

In a D.C. generator, the iron losses mainly take place in___________/

A. yoke B. commutator C. armature conductors D. armature rotor...