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Power Systems

Power Systems
Which of the following plants is/are base load plants

 both 1 and 2
 run off river
 pump storage
 nuclear

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Power Systems
A 25 MVA, 11 kV alternator is supplying full load at a point of 0.75 lagging. Determine the percentage increase in earning capacity when it is operated at improved power factor of 0.96 lagging.

  14 %.
  None of above
  56 %.
  28 %.

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Power Systems
Find the relation between sub transient (X"), transient (X') and synchronous reactance (X) ?

 X" > X' < X
 X" > X' >X
 X" < X' < X
 X" < X' > X

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Power Systems
The Gauss Seidel load flow method has following disadvantages. Which of the following statement is wrong?

 Unreliable convergence
 A good initial guess for voltages is essential for convergence
 Choice of slack bus affects the convergence
 Slow convergence

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Power Systems
A diesel power station has fuel consumption of 0.28 Kg per kWh. The calorific value of fuel is being 10000 KCal / kg. Determine the overall efficiency

  30.26 %.
 40 %.
 40.85 %.
  30.7 %.

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Power Systems
Which following statement are not true for line parameters R, L, G and C of transmission line

 All of above.
 G = 1/R where G is conductance of line.
 Both R and G depend on the conductivity of conductor forming the line.
 LC = μ ε and RG = σ ε.

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