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

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

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Power Systems
Half life is defined as

 none of above.
 the time required to spiliting of a heavy nucleus.
 the time required for full of atoms in a specimen disintegrate.
  the time required for one half of isotope to decay.

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