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Power Systems

Power Systems
A 4 bus power system consists of 4 transmission lines, then find the sparsity of Y bus matrix?

 0.4
 0.25
 0.75
 0.5

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Power Systems
Graphite is use din nuclear plant as a / an

  moderator.
 electrode.
 fuel.
 coolant.

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Power Systems
Surge impedance loading (SIL) is represented by

 Vl²*√(C/L)
 Vl²/Zs
 both 1 and 2
 Vph²/Zs

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Power Systems
Which of following power plants will take long period in erection and installation

 Hydro Power Plant
 Nuclear.
 Thermal.
 Gas turbine.

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Power Systems
Which of the following statements is/are true? In case of parallel transmission lines

 fault current increases
 stability increases
 both 1 and 3
 fault current reduces

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Power Systems
The maximum efficiency of modern coal fired steam steam raising thermal power plants is restricted to about 0.35( a low value), mainly because of

 low alternator efficiency
 high energy loss in condenser
 low steam turbine mechanical efficiency
 high energy loss in boilers

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