Power Systems
Water hamming process in pen-stocks results in

  noise increases, pressure increases, velocity decreases.
None of these
  pressure increases.
  noise increases.

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Power Systems
The factor affecting run off are

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

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