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

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

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Power Systems
The factor affecting run off are

 amount of vegetation and weather condition in the catchment area.
 rain fall pattern, shape and size of catchment area.
 the topography and nature of soil in the catchment area.
  all of above.

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