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Power Systems

Power Systems
The angular moment of 10 MVA generator is 0.2. Find the new value of angular moment for 20 MVA base?

 0.2 pu
 0.25 pu
 0.4 pu
 0.1 pu

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Power Systems
Area under the daily curve divided by 24 gives

 average load
 units generated
 maximum load
 maximum demand

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Power Systems
Which of the following represents the transmission or reflection coefficient of voltage Tv? (Zl = Surge impedance of load, Zs = Surge impedance of line)

 (Zl - Zs)/(Zs + Zl)
 2Zs/(Zs + Zl)
 2Zl/(Zs + Zl)
 (Zs - Zl)/(Zs + Zl)

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Power Systems
Which of the following power plants needs highly skilled/qualified engineers for its operation

 Nuclear.
 Gas-turbine.
 Thermal.
 Hydro Power Plant

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Power Systems
In which of the following frequency control method tie line may be overloaded?

 parallel frequency
 flat frequency control
 flat tie line control
All of these

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Power Systems
Which of the following decides the insulation level of 400 kV, EHV line?

 switching over voltage
 skin effect
 radio interference
 lighting voltage

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