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Power Systems

Power Systems
If the time of operation of a relay for unity TMS is 10 sec. the time of operation of 0.5 TMS will be _______________ secs.

 20.
 3.
  5.
 7.

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Power Systems
Incremental cost of two generators Ic1 = 0.2 P1+60, Ic2 = 0.3 P2+40 and the ratings of the generator are 150 and 250 MW. Find the load sharing of each generator for a load of 200 MW?

 P1 = 60 MW, P2 = 140 MW
 P1 = 100 MW, P2 = 100 MW
 P1 = 80 MW, P2 = 120 MW
 P1 = 120 MW, P2 = 80 MW

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Power Systems
A penstock is used as a condition between

 the heat ex-changer and the turbine in nuclear power plant.
  the dam and the turbine in a hydro station.
 the turbine and discharge drain.
 none of above.

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Power Systems
A transmission line has a surge impedance of 400 Ω is connected with the cable having surge impedance of 40 Ω, a surge magnitude of 100 kV is travelling from the transmission line towards the cable. Find the reflected voltage?

 18.18 kV
 81.82 kV
 -81.82 kV
 -18.18 kV

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Power Systems
The most commonly used material for insulators of overhead lines is

 glass
 porcelain
 mica
 PVC

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Power Systems
When a nuclear reaction is operating at constant power the multiplication factor is

  1.
 greater than 1.
 less than 1.
 may be any of the above.

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