Power Systems
A cable has inductance of 0.22 mH per km and capacitance of 0.202 µF per km. The surge impedance of the cable is

 40 Ω
 28 Ω
 52 Ω
 33 Ω

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Power Systems
A CANDU reactor uses

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

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