Power Systems
Which of the following are the fissile materials

 U235, U233 and Pu239.
  None of these.
 U235 and Th239.
 U238 and Th232.

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Power Systems
The advantage of hydro electric power station over thermal power station is

 hydro electric power station can supply the power throughout the year
 the initial cost of hydro electric power station is low
 the operation cost of hydro electric power station is low
 hydro electric station can be constructed at the place where the energy is required

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