Over voltage protection is recommended for______________?

Related Mcqs:

1. The under voltage relay can be used for______________?

   A. generators B. busbars C. transformers D. motors E. all of the above...

2. Overfluxing protection is recommended for_____________?

   A. distribution transformer B. generator transformer of the power plant C. auto-transformer of the power plant D. station transformer of the power plant...

3. For which of the following ratings of the transformer differential protection is recommended ?

   A. above 30 kVA. B. equal to and above 5 MVA C. equal to and above 25 MVA D. none of the above...

4. 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...

5. A thermal protection switch can protect against_____________?

   A. short-circuit B. temperature C. overload D. over voltage...

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

   A. interception B. interception and conduction C. interception, conduction and dissipation D. interception, conduction, dissipation and reflection E. none of the above...

7. H.R.C. fuses provide best protection against________________?

   A. overload B. reverse current C. open-circuits D. short-circuits...

8. For which of the following protection from negative sequence currents is provided ?

   A. Generators B. Motors C. Transmission line D. Transformers...

9. The inverse definite mean time relays are used for over current and earth fault protection of transformer against_________________?

   A. heavy loads B. internal short-circuits C. external short-circuits D. all of the above...

10. A fuse in a motor circuit provides protection against__________?

    A. overload B. short-circuit and overload C. open circuit, short-circuit and overload D. none of the above...