Power Systems
Which of the following circuit breakers produce least arc energy?

  Air blast CB.
 Air break CB.
 Minimum oil CB.
 Plain oil CB.

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Power Systems
In boiler water reactor (BWR)

 there is danger of radioactive contamination of steam.
  all of above.
 enriched uranium is used as fuel.
 the feed water acts both coolant and a moderator.

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