Which of the following AC. motors is usually used in large motor-generator sets?

Related Mcqs:

The efficiency of the copper oxide rectifier seldom exceeds____________?

A. 90 to 95% B. 85 to 90% C. 80 to 85% D. 65 to 75%...

A rotary converter in general construction and design, is more or less like___________?

A. a transformer B. an induction motor C. an alternator D. any D.C. machine...

The voltage drop at anode, in a mercury arc rectifier is due to_____________?

A. self restoring property of mercury B. high ionization potential C. energy spent in overcoming the electrostatic field D. high temperature inside the rectifier...

The cathdde voltage drop, in a mercury arc rectifier, is due to_____________?

A. expenditure of energy in ionization B. surface resistance C. expenditure of energy in overcoming the electrostatic field D. expenditure of energy in liberating electrons from the mercury...

In which of the following equipment direct current is needed ?

A. Telephones B. Relays C. Time switches D. All of the above...