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Power Systems

Power Systems
Surge tank is kept very close to the

 pen stock
 generator
 turbine
 spill way

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Power Systems
If, for a given alternator in economic operation mode, the incremental cost is given by (0.012 P + 8) Rs/MWh, dPL/dP = 0.2 and plant λ = 25, then power generation is

 1500 MW
 1000 MW
 1250 MW
 750 MW

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Power Systems
A thermal protection relay provides protection against what?

 Temperature
 any of the above
 Short circuit
 Over load

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Power Systems
The load duration curve for a system is 8 hours 30 MW, 16 hours 25 MW and 24 hours 20 MW. The load factor will be

  0.83.
 0.44.
 1.3.
 0.25.

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Power Systems
For some given transmission line the expression for voltage regulation is given by (Vs - Vr)/Vr *100%. Hence,

 this expression is true for any line
 this may either be a medium line or short line
None of these
 this must be a short line

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Power Systems
Find the number of insulator discs required in string insulator, if operating voltage is 220 kV and maximum voltage of each disc is 11 kV?

 21
 20
 13
 10

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