Power Systems
Where is the draft tube of a hydroelectric plant that is an airtight pipe located

  In between the penstock and runner.
 At the beginning of the penstock.
 In between the runner exhaust and the tail race.
 Near the surge tank.

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Power Systems
The factor affecting run off are

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

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