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Power Systems

Power Systems
Length of short transmission line is up to

 150 km
 any of the above
 80 km
 40 km

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Power Systems
Equal area criteria is used for

 relative stability of the system
 either 1 or 2
 absolute stability of the system
 nether 1 nor 2

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Power Systems
For 800 MJ stored energy in the rotor at synchronous speed, what is the inertia constant H for a 50 Hz, four pole turbo generator rated 100 MVA, 11 kV?

 2 MJ/MVA
 6 MJ/MVA
 4 MJ/MVA
 8 MJ/MVA

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Power Systems
Transmission line has a length of 300 km, operating at sending end voltage Vs = 1 pu, find the receiving end voltage(Vr) at no load?

 0.098 pu
 0.98 pu
 1 pu
 1.098 pu

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Power Systems
The ground capacitance existing between transmission line and ground is 4µF. Find the inductive reactance of the peterson coil for compensation of arcing grounds?

 0.844 Ω
 265.25 Ω
 855.26 Ω
 625.35 Ω

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Power Systems
The characteristic impedance of a transmission line is

 Directly proportional to its length.
 Independent of its length.
 Directly proportional to square root of its length.
 Inversely proportional to square root of its length.

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