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Power Systems

Power Systems
Units of incremental cost is

 Rs/MWhr
 Rs/hr
 RsMW/hr
 MWhr/Rs

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Power Systems
At slack bus, which one of the following combinations of variables is not specified?

 P and Q
 P and V
 V and δ
 Q and V

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Power Systems
Reflector nuclear reactor are made of

 steel.
 boron.
 cast iron.
  beryllium.

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Power Systems
A 10 MVA generator has reactance of 0.2 pu. Find the new reactance value for 50 MVA base?

 1 pu
 0.25 pu
 5 pu
 0.2 pu

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Power Systems
The charging reactance of 50 km transmission line is 1500 Ω. What is the charging reactance for 100 km length of line?

 750 Ω
 1500 Ω
 3000 Ω
 1000 Ω

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Power Systems
Which of the following relationships are not valid for short transmission lines

 A = D = 1
All of these
 B = C = Z
 Is = Ir

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