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


Switchgear and protection MCQ ONLY upto 50

46.  The transient voltages that appears across the contacts at the instant of arc extinction is called ..............voltage


   A. Supply

   B. Recovery

   C. Restriking

   D. Peak


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C. Restriking

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47.  The power loss is an important factor for the design of


   A. Transmission line

   B. Motor

   C. Generator

   D. Feeder


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B. Motor

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48.  SF6 gas


   A. Is yellow in colour

   B. Is lighter than air

   C. Is non-toxic

   D. Has pungent small


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C. Is non-toxic

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49.  SF6 gas is transported in


   A. Air cylinders

   B. Gas cylinders

   C. Liquid from in cylinders

   D. Solid form in boxes


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C. Liquid from in cylinders

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50.  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


✔ View Answer


D. Loose connection

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