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Power Systems

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

 V and δ
 P and V
 Q and V
 P and Q

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Power Systems
A 3 core cable gives on test a capacitance of 3.7 µF between two cores. Find the line charging current of the cable when it is connected to 11 kV, 50 Hz system?

 1 A.
 1.476 A.
 14.7 mA.
  14.76 A.

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

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

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Power Systems
If the fault is very nearer to the generator, the fault current is

 any of the above
 less
 larger
 zero

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Power Systems
The specific speed of water turbine is the speed at which the turbine develops

  unit horse power at unit head.
 unit horse power at all heads.
 a minimum horse power.
 maximum horse power.

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Power Systems
The Y bus matrix of a 100 bus interconnected system is 90% sparse. Then find the number of non zero elements in the Y bus matrix?

 90
 9000
 10
 1000

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