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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

 250
 500
 450
 900

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Power Systems
If the fault current is 2000 A, the relay setting is 50% and CT ratio is 400 : 5, then plug setting multiplier will be

 10.
 15.
 50.
 25.

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Power Systems
If power P available from a hydroelectric plant is given by the formula P = 9.81QH, where Q is the flow rate through the turbine in l / s and H is the head in meters, then P will be unit of

 kWh.
 kJ / S.
  W.
 HP.

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Power Systems
The power output from an hydroelectric plants depend on

 type of dam, head, system efficiency.
  discharge, system efficiency.
 type of dam, type of catchment area and discharge.
 type of turbine, type of dam and type of catchment area.

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Power Systems
Cheapest plant in operation and maintenance is

  steam power.
  diesel power.
  hydroelectric.
  nuclear.

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Power Systems
Steady state stability of a power system is improved by

 using double circuit line instead of single circuit line
All of these
 decreasing generator inertia
 single pole switching

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