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


1.  Outdoor switchgear is generally used for voltage beyond


   A. 11 KV

   B. 33 KV

   C. 66 KV

   D. 132 KV


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C. 66 KV

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2.  The least expensive protection for over current in low-voltage system is


   A. Rewirable fuse

   B. Isolator

   C. Circuit breaker

   D. Air-break switch


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A. Rewirable fuse

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3.  Purpose of backup protection is


   A. To increase the speed

   B. To increase a reach

   C. To leave no blind spot

   D. To guard against failure of primary


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D. To guard against failure of primary

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4.  We do not require any protection against prime mover failure in case of


   A. Turbo generator sets

   B. Hydro generator sets

   C. Diesel engine driven alternators

   D. Back pressure turbo generators


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A. Turbo generator sets

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5.  For the protection of stator winding of an alternate against internal fault involving ground the relay used is a


   A. Biased differential relay

   B. Directional over-current relay

   C. Plain impedance relay

   D. Buchholz relay


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A. Biased differential relay

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