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POWER SYSTEMS

Power Systems
Which of the following is a reaction turbines

  Pelton turbine and Francis turbine.
  Francis turbine and Kaplan turbine.
  Kaplan and Pelton turbine.
  None of these.

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Power Systems
Alternate formation and breakage of bubbles are called

  cavitations.
  water hamming.
All of these
  surgfication.

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Power Systems
Water hamming process in pen-stocks results in

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

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Power Systems
A hydro electric generating station is supplied from a reservoir of capacity 5 × 10 − 6 cubic meters at a head of 200 meters. Find the total energy available in KWh if the overall efficiency is 75 %

 4.06 × 106 kWh.
 5 × 106 kWh.
 3 × 106 kWh.
  2.044 × 106 kWh.

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Power Systems
For harnessing low variable water heads, the suitable hydraulic turbine with high percentage of reaction and runner adjust vanes is

  Francis.
  Pelton.
  Kaplan.
  Impeller.

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