Which of the following medium is employed for extinction of arc in air circuit breaker?

Related Mcqs:

Arc in a circuit behaves as_______________?

A. a capackive reactance B. an inductive reactance C. a resistance increasing with voltage rise across the arc D. a resistance decreasing with voltage rise across the arc...

The voltage appearing across the contacts after opening of the circuit breaker is called__________voltage

A. recovery B. surge C. operating D. arc E. none of the above...

A.C. network analyser is used to solve problems of_______________?

A. load flow B. load flow and short-circuit C. load flow and stability D. load flow, short-circuit and stability E. none of the above...

Which of the following devices will receive voltage surge first travelling on the transmission line ?

A. Lightning arresters B. Relays C. Step-down transformer D. Switchgear...

An isolator is installed_____________?

A. to operate the relay of circuit breaker B. as a substitute for circuit breaker C. always independent of the position of circuit breaker D. generally on both sides of a circuit breaker...