Power Systems
In which of the following frequency control method tie line may be overloaded?

 parallel frequency
 flat frequency control
 flat tie line control
All of these

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Power Systems
A CANDU reactor uses

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

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