Single Busbar Protection Objective Type Questions and answers


11.  Single bus-bar arrangement


   A. Is cheapest in initial as well as maintenance cost

   B. Provide simple operation and relaying system

   C. Has the drawback that there will be complete shut down when a fault occurs on the bus itself

   D. All of the above


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D. All of the above

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12.  In a single bus bar system there will be complete shutdown when


   A. Fault occurs on the bus itself

   B. Fault occurs on neutral line

   C. Two or more faults occur simultaneously

   D. Fault occurs with respect to earthing


✔ View Answer


A. Fault occurs on the bus itself

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13.  The main factor in favour of the use of aluminium as bus bar material is its


   A. Low-cost

   B. Low-density

   C. Low melting point

   D. High resistivity


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A. Low-cost

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14.  Double bus bar arrangement makes use of two identical bus bus and has the advantages that


   A. It does not require any bus coupler and permits switchover from one bus to another whenever desired

   B. It provides maximum flexibility and reliability

   C. Either bus bar may be taken up for maintenance

   D. All of the above


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D. All of the above

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15.  The voltage of a particular bus is regulated by controlling the


   A. Active power of the bus

   B. Reactive power of the bus

   C. Phase angle

   D. Phase angle and reactive power


✔ View Answer


D. Phase angle and reactive power

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