Power Systems
String efficiency depends upon

 no. of SCR in the string.
 voltage rating of one SCR.
  all of these.
 voltage rating of whole string.

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Power Systems
An impulse turbine

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

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Power Systems
A CANDU reactor uses

 enriched uranium as fuel and ordinary water as moderator and cooler.
  natural uranium as fuel and heavy water as moderator and coolant.
 highly enriched uranium as fuel and water as moderator and coolant.
 only fertile materials.

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