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Power Systems

Power Systems
Range of accelerating factor is

 50 to 100
 1 to 10
 10.8 to 11.2
 1.6 to 1.8

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Power Systems
The voltage regulation of a line at full load 0.8 power factor is 11. A long transmission line under no load conditions, for a good voltage profile needs

 shunt reactor at receiving end
 shunt resistance at receiving end
All of these
 shunt capacitor at receiving end

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Power Systems
Mercury is choice with steam in binary vapor cycle because

 relative low vaporization pressure.
 higher critical temperature and pressure.
  all of above.
 higher saturation temperature than other fluids.

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Power Systems
A generator has reactances of sub transient (X")= 0.5 pu, transient (X') = 0.8 pu and synchronous reactance (X) = 5 pu. The voltages at these reactances are 1.2 V, 1.1 V and 1 V respectively. Find the corresponding sub transient fault current in pu?

 2.4 pu
 0.2 pu
 3.975 pu
 1.375 pu

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Power Systems
Zero voltage regulation is possible only for

 lagging power factor
 leading power factor
 unity power factor
All of these

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Power Systems
A load centre is at an equidistant from the two thermal generating stations G1 and G2. The fuel cost characteristics of the generating stations are given by F1 = a + bP1 + cP²1 F2 = a + b P2 + 2cP²2 Where P1 and P2 are the generation in MW of G1 and G2, respectively. For most economic generation to meet 300 MW of load, P1 and P2 respectively, are

 200, 100
 100, 200
 175, 125
 150, 150

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