Power Systems
In a transmission line the insulators to be used at the dead end or sharp curves are

 suspension type
 pin type insulator
 any of the above
 strain type

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Power Systems
An impulse turbine

 makes use of a draft tube.
 is most suited for low head and high discharge power plants.
 always operates submerged.
  operates by initial complete conversion to kinetic energy.

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Power Systems
In hydroelectric power plants

  operating cost is low and initial cost is high.
 operating cost is high and initial cost is low.
 both operating and initial cost are high.
 both operating and initial cost are low.

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