When the load is above _______________ a synchronous motor is found to be more economical?

Related Mcqs:

The selection of an electric motor for any application depends on which of the following factors ?

A. Electrical characteristics B. Mechanical characteristics C. Size and rating of motors D. Cost E. All of the above...

While selecting an electric motor for a floor mill, which electrical characteristics will be of least significance ?

A. Running characteristics B. Starting characteristics C. Efficiency D. Braking...

Flame proof motors are used in_________________?

A. paper mills B. steel mills C. moist atmospheres D. explosive atmospheres...

In squirrel cage induction motors which of the following methods of starting cannot be used ?

A. Resistance in rotor circuit B. Resistance in stator circuit C. Auto-transformer starting D. Star-delta starting...

Heavy duty cranes are used in________________?

A. ore handling plants B. steel plants C. heavy engineering workshops D. all of the above...