Switchgear And Protection | Switchgear And Protection Objective Type Questions and answers

26.  In between the generating station and consumers a number of transformation and switching stations exist, these are called the

   A. Switchgears

   B. Substations

   C. Intermediate substations

   D. Transformation stations

27.  With large reactance interconnector between two power stations

   A. The power stations may fall out of step due to large angular displacement between the power stations

   B. Power will be transferred with minimum power losses

   C. Power will be transferred with voltage fluctuations and noise

   D. None of the above

28.  In a isolated neutral system, when a single line to ground fault occurs

   A. Persistent arcing grounds will be developed

   B. Voltage in the healthy phases rise to full line value causing isolation breakdown

   C. The capacitive current in the faulty phase rises to 3 times its normal value

   D. All of the above

29.  Tap changing transformers are employed for

   A. Stepping down the voltage

   B. Stepping up the voltage

   C. Supplying low-voltage current to instruments

   D. Both stepping up and stepping down the voltage

30.  Field failure in an alternator occurs due to

   A. Failure of exciter

   B. Faulty field circuit breaker

   C. In rush of large currents

   D. Both A and B

< 1 2 3 4 5 6 7 8 9 10 Next>