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Power Systems

Power Systems
In which of the following given faults, all the sequence currents are equal?

 LLG
 LL
 LG
 LLL

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Power Systems
A 20 MVA generator has inertia constant of 0.5 pu. Find new value for 50 MVA base?

 0.5 pu
 0.2 pu
 0.1 pu
 0.4 pu

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Power Systems
If the penalty factor of a plant is unity, its incremental transmission loss is

 1
 -1
 0
None of these

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Power Systems
Taking the density of water to be 1000 kg/m³, how much power would be developed by a hydro electric generator unit, assume 100% efficiency, with 1 m head and 1 m³/s discharge?

 2.90 kW
 19.60 kW
 4.45 kW
 9.81 kW

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Power Systems
Due to proximity effect, the increase in conductor resistance is not negligible in

 underground cable
 overhead transmission lines
 communication lines
All of these

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Power Systems
Mho relay is usually employed for protection of

 any line
 short transmission lines only
 long transmission lines only
 medium transmission lines only

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