Power Systems
For harnessing low variable water heads, the suitable hydraulic turbine with reaction and adjustable vanes is

 Francis.
 Impeller.
 Pelton.
  Kaplan.

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Power Systems
Which of the following statements is true? Corona loss increases with

 decrease in conductor size and increase in supply frequency
 increase in conductor size and decrease in supply frequency
 decrease in conductor size and decrease in supply frequency
 increase in conductor size and increase in supply frequency

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