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Power Systems

Power Systems
The Y bus matrix of 100 bus interconnected system is 90% sparse. Hence the number of transmission lines in the system must be

 900
 250
 450
 500

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Power Systems
What is the correct expression for the electrical power developed by

  ( 0.763 / 75 ) × WQHη.
 ( 7 / 75 ) × WQHη.
 75 × 0.736 × WQHη.
 ( 75 / 0.736 ) × WQHη.

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Power Systems
For transmission line which one of the following relation is true?

 AD - BC = -1
 AD - BC = 0
 AD - BC = 1
 AD + BC = 0

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Power Systems
String chart is drawn between

 both 1 and 2
 nether 1 nor 2
 temperature (T) on X- axis, sag(S) and tension (T) on Y-axis
 T on Y-axis and S and T on on X-axis

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Power Systems
The function of draft tube is reaction turbine is to

 all of above.
  convert kinetic energy of water.
 increase flow rate of water.
 reduce water hammer.

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Power Systems
Stability of a transmission line can be increased by

 both 1 and 2
 series capacitor
 shunt reactor
 shunt capacitor

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