Power Systems Which of the following effects are associated with transmission line ferranti effect All of these skin effect corona effect ferranti effect All of these skin effect corona effect ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 200 MVA alternator operated at no load at frequency of 50 Hz, it has inertia constant of 5 MWsec/MVA and governing system has a time delay of 0.6 sec. If the load of 50 MW is suddenly applied then find the frequency deviation during this time? -0.85 Hz 0.76 Hz 0.85 Hz -0.76 Hz -0.85 Hz 0.76 Hz 0.85 Hz -0.76 Hz ANSWER DOWNLOAD EXAMIANS APP
Power Systems A cable has inductance of 0.22 mH per km and capacitance of 0.202 µF per km. The surge impedance of the cable is 33 Ω 40 Ω 28 Ω 52 Ω 33 Ω 40 Ω 28 Ω 52 Ω ANSWER DOWNLOAD EXAMIANS APP
Power Systems Differential relays does not used for which of the following faults? faults within a transformer through faults both 1 and 2 faults within a generator faults within a transformer through faults both 1 and 2 faults within a generator ANSWER DOWNLOAD EXAMIANS APP
Power Systems For some given transmission line the expression for voltage regulation is given by (Vs - Vr)/Vr *100%. Hence, None of these this must be a short line this expression is true for any line this may either be a medium line or short line None of these this must be a short line this expression is true for any line this may either be a medium line or short line ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 1- phase transmission line operating at 30 kV has radius of 1 cm and distance between conductors is 0.5 m. Assume m = δ =1, g = 21 kV/cm and frequency f = 50 Hz. Find the critical disruptive voltage? 17.32 kV/phase 41.075 kV/phase 82.15 kV/phase 34.64 kV/phase 17.32 kV/phase 41.075 kV/phase 82.15 kV/phase 34.64 kV/phase ANSWER DOWNLOAD EXAMIANS APP
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