A balanced 3-phase system consists of_______________?

Related Mcqs:

1. 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...

2. 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...

3. The power loss is an important factor for the design of_______________?

   A. transmission line B. motor C. generator D. feeder...

4. relay is preferred for phase fault on short transmission line?

   A. Induction type B. Reactance C. Impedance D. None of the above...

5. relays are used for phase faults on long line?

   A. Impedance B. Reactance C. Either of the above D. None of the above...

6. 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...

7. Air blast circuit breaker is used for_____________?

   A. over currents B. short duty C. intermittant duty D. repeated duty...

8. 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...

9. Series reactors should have________________?

   A. low resistance B. high resistance C. low impedance D. high impedance...

10. Oil switches are employed for_____________?

    A. low currents circuits B. low voltages circuits C. high voltages and large currents circuits D. all circuits...