Power Systems The most commonly used material for insulators of overhead lines is mica porcelain glass PVC mica porcelain glass PVC 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? -0.76 Hz 0.76 Hz -0.85 Hz 0.85 Hz -0.76 Hz 0.76 Hz -0.85 Hz 0.85 Hz ANSWER DOWNLOAD EXAMIANS APP
Power Systems A penstock is used as a condition between the heat ex-changer and the turbine in nuclear power plant. the turbine and discharge drain. none of above. the dam and the turbine in a hydro station. the heat ex-changer and the turbine in nuclear power plant. the turbine and discharge drain. none of above. the dam and the turbine in a hydro station. ANSWER DOWNLOAD EXAMIANS APP
Power Systems If the inertia constant H = 8 MJ/MVA for a 50 MVA generator, the stored energy is 400 MJ 50 MJ 200 MJ 8 MJ 400 MJ 50 MJ 200 MJ 8 MJ ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which type of connection is employed for current transformers for the protection of star- delta connected 3-phase transformer? star-delta star-star delta-delta delta-star star-delta star-star delta-delta delta-star ANSWER DOWNLOAD EXAMIANS APP
Power Systems The surge impedance of a 400 km long overhead transmission line is 420 Ω. For a 200 km length of the same line, the surge impedance will be 210 Ω 840 Ω 400 Ω 420 Ω 210 Ω 840 Ω 400 Ω 420 Ω ANSWER DOWNLOAD EXAMIANS APP
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