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Power Systems

Power Systems
Rankine cycle efficiency of a steam power plant is of

  30 - 45 %.
  20 - 30 %.
  45 - 80 %.
  60 - 80 %.

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Power Systems
Condition for maximum voltage regulation

 tanφ = X/R
 cosφ = R/X
 tanφ = R/X
 cosφ = X/R

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Power Systems
Surge impedance loading of a transmission line can be increased by

 addition of lumped capacitance in series
 increasing its voltage level
 both 1 and 3
 addition of lumped inductance in parallel

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Power Systems
A 3-phase, 110 kV coaxial XLPE insulated power cable delivering power at 50 Hz, has a capacitance of 125 nF/km. If the dielectric loss tangent of XLPE is 2*10^-4, then dielcetric power loss in this cable in W/km/phase is

 38.6
 31.7
 23.9
 35.45

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Power Systems
Which of the following statement is/are true regarding infinite line?

 It maintains the constant voltage
 It has infinite voltage
 both 2 and 3
 It has infinite length

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Power Systems
In a two plant system, the load is connected to plant number 2. The loss coefficients are

 B11,B12 are non zero ,B22 = 0
 B11,B22,B12 are non zeros
 B11 is non zero,B22 = B12 = 0
 B11,B22 are non zero,B12 = 0

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