A short-circuit is identified by_____________?

Related Mcqs:

1. To reduce short circuit fault currents are used_____________?

   A. reactors B. resistors C. capacitors D. none of the above...

2. Short-circuit currents are due to_______________?

   A. single phase to ground faults B. phase to phase faults C. two phase to ground faults D. three phase faults E. any of these...

3. The short circuit in any winding of the transformer is the result of______________?

   A. mechanical vibration B. insulation failure C. loose connection D. impulse voltage...

4. The short circuit in any winding of the transformer is the result of_______________?

   A. mechanical vibration B. insulation failure C. loose connection D. impulse voltage...

5. To limit short-circuit current in a power system are used______________?

   A. earth wires B. isolators C. H.R.C. fuses D. reactors...

6. A transmission line is protected by_____________?

   A. inrush protection B. distance protection C. time graded and current graded over current protection D. both (B) and (C) E. none of the above...

7. The steady state stability of the power system can be increased by_____________?

   A. connecting lines in parallel B. connecting lines in series E. using machines of high impedance D. reducing the excitation of machines E. none of the above...

8. Magnetic circuit breaker has ___________ trip action

   A. delayed B. instantaneous C. both of the above D. none of the above...

9. In a circuit breaker the basic problem is to________________?

   A. maintain the arc B. extinguish the arc C. transmit large power D. emit the ionizing electrons...

10. The arc voltage produced in A.C. circuit breaker is always_____________?

    A. in phase with the arc current B. lagging the arc current by 90″ C. leading the arc current by 90° D. none of the above...