Busbar Protection | Busbar Protection Objective Type Questions and answers

6.  Due to which of the following reasons aluminium is being favoured as bus-bar material?

   A. Low-density

   B. Low-cost

   C. Ease of fabrication

   D. None of the above

7.  Which of the following bar schemes is the most expensive?

   A. Double bus-bar double breaker

   B. Ring bus-bar scheme

   C. Single bus-bar scheme

   D. Main and transfer scheme

8.  When an alternator connected to the bus-bar is shut down the bus-bar voltage will

   A. Fall

   B. Rise

   C. Remain unchanged

   D. none of the above

9.  The bus-bar zone, the purpose of protection includes .............., ............and .............

   A. Bus-bars, isolating switches, circuit breakers

   B. Transformers, relays, circuit breakers

   C. Transformers, conductors and relays

   D. None of the above

10.  If a voltage controlled bus is treated as a load bus, then which one of the following limits would be violated ?

   A. Voltage

   B. Active power

   C. Reactive power

   D. Phase angle

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