Power Systems
In hydro power stations what is an enlarged body of water just above the intake and used as a regulating reservoir called

  Fore bay.
 Reservoir.
 Spillways.
 Penstock.

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Power Systems
Half life is defined as

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

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