Which of the following motor is preferred for operation in highly explosive atmosphere ?

Related Mcqs:

These days D.C. motors are widely used in____________?

A. pumping sets B. air compressors C. electric traction D. machine shops...

The power mentioned on the name plate of an electric motor indicates____________?

A. the power drawn in kW B. the power drawn in kVA C. the gross power D. the output power available at the shaft...

For a D.C. shunt motor if the excitation is changed_______________?

A. torque will remain constant B. torque will change but power will remain constant C. torque and power both will change D. torque, power and speed, all will change...

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...

If the load on a DC shunt motor is increases, its speed is slightly reduced due to______________?

A. increase in armature current B. increase in flux C. decrease in reactance D. decrease in back emf...