Power Systems
Reactance relays are used for the protection of

 short transmission lines only
 medium transmission lines only
All of these
 long transmission lines only

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Power Systems
A thermal power station needs space

  less than that required by hydro-power station of same capacity.
 less than that required by a gas turbine power plant of same output.
 less than that required by the diesel power station of same output.
 less than that required by atomic power station of the same output.

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