Power Systems
Surge impedance loading of a transmission line can be increased by

 addition of lumped inductance in parallel
 addition of lumped capacitance in series
 both 1 and 3
 increasing its voltage level

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Power Systems
A CANDU reactor uses

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

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