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Higher Study | Power Systems | Circuit Breakers

In the case of circuit breakers if the length of arc increases, its resistance:
In circuit breaker, to facilitate arc quenching, dielectric strength can be increased by
Which of the following can be placed near the main board to protect the whole installation?
Select the material having the highest arc interrupting capability when used as a medium in circuit breaker.
A Bimetallic strip breaks the circuit when:
The time which elapses between the instant when the actuating quantity exceeds the pickup value and the instant when the relay contacts close is called:
Where can we employ low resistance methods of arc extinction?
A type of circuit breaker which can work up to 15 kV and the rupturing capacity of that circuit breaker is 2500 MVA. Determine the type of circuit breaker mentioned in the context and shown in the given figure.
What type of circuit breakers are preferred for arc furnance and traction system because of the suitability for repeated operation?
At what level of current flow during electric shock death is possible.
A circuit breaker essentially consists of fixed and moving contacts. What are they called? 
Which one of the following is NOT a method of arc extinction ?
Which type of circuit breaker has a higher rating ?
Which of the following is not an essential characteristic of switchgear?
It is a circuit breaker in which the heat generated by the high current in the medium between the contacts is sufficient to ionize the medium. Which medium is used in the circuit breaker?
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