Power Systems
An impulse turbine

 is most suited for low head and high discharge power plants.
 always operates submerged.
 makes use of a draft tube.
  operates by initial complete conversion to kinetic energy.

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Power Systems
Half life is defined as

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

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Power Systems
The value of off diagonal elements is

 which is connected between bus i and bus j with positive sign
 which is connected between bus i and bus j with negative sign
 sum of admittances connected at bus j
 sum of admittances connected at bus i

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