For the protection of power station buildings against direct strokes the requirements are___________?

Related Mcqs:

Circuit breakers are essentially____________?

A. current carrying contacts called electrodes B. arc extinguishers C. circuits to break the system D. transformers to isolate the two systems E. any of the above...

The current zero interruption, in oil and air blast circuit breakers, is achieved by_______________?

A. lengthening of the gap B. cooling and blast effect C. both A. and B D. deionizing the oil with forced air E. none of the above...

Which of the following is the least expensive protection for overcurrent is low voltage system ?

A. Rewireable fuse B. Isolator C. Oil circuit breaker D. Air break circuit breaker E. None of the above...

Arc in a circuit breaker is interrupted at___________?

A. zero current B. maximum current C. minimum voltage D. maximum voltage...

The torque produced in induction type relay (shaded pole structure) is_____________?

A. inversely proportional to the current B. inversely proportional to the square of the current C. proportional to the current D. proportional to square of the current...