Which D.C. motor is generally preferred for cranes and hoists ?

Related Mcqs:

If the field of a D.C. shunt motor gets opened while motor is running______________?

A. the speed of motor will be reduced % B. the armature current will reduce C. the motor will attain dangerously high speed 1 D. the motor will continue to nuvat constant speed...

The type of D.C. motor used for shears and punches is_____________?

A. shunt motor B. series motor C. differential compoutid D.C. motor D. cumulative compound D.C. motor...

D.C. series motors are used______________?

A. where load is constant B. where load changes frequently C. where constant operating speed is needed D. in none of the above situations...

If the speed of a D.C. shunt motor is increased, the back e.m.f. of the motor will_________?

A. increase B. decrease C. remain same D. become zero...

When the armature of a D.C. motor rotates, e.m.f. induced is___________?

A. self-induced e.m.f. B. mutually induced e.m.f. C. back e.m.f D. none of the above...