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 is/are the advantages of synchronous phase modifier over the shunt compensation?

 single unit can be used as both capacitance and inductor by adjusting the excitation
 both 1 and 2
 initial cost is low
 smooth voltage regulation is possible by controlling excitation

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