Besides a constant speed a synchronous rotor possesses which of the following advantages ?

Related Mcqs:

Which of the following motors are pre-ferred for overhead travelling cranes ?

A. Slow speed motors B. Continuous duty motors C. Short time rated motors D. None of the above...

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...

By the use of which of the following m D.C. can be obtained from AC. ?

A. Silicon diodes B. Mercury arc rectifier C. Motor generator set D. Any of the above...