Power Systems Two identical synchronous machines having same inertia constant are connected in parallel and swinging together. The effective inertia constant is 4 MJ/MVA. Then each machine has inertia constant of 16 MJ/MVA 2 MJ/MVA 4 MJ/MVA 8 MJ/MVA 16 MJ/MVA 2 MJ/MVA 4 MJ/MVA 8 MJ/MVA ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following decides the insulation level of 400 kV, EHV line? radio interference switching over voltage skin effect lighting voltage radio interference switching over voltage skin effect lighting voltage ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following power planets is the least reliable Solar. Geothermal. Tidal. Wind. Solar. Geothermal. Tidal. Wind. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Skin effect depends on frequency relative permeability All of these conductivity frequency relative permeability All of these conductivity ANSWER DOWNLOAD EXAMIANS APP
Power Systems The most suitable circuit breaker for short line fault without switching resistor is air blast circuit breaker. oil circuit breaker. none of these. SF6 breaker. air blast circuit breaker. oil circuit breaker. none of these. SF6 breaker. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The pu parameters for a 500 MVA machine on its own base are: Inertia, H = 20 pu; reactance X = 2 pu. The pu values of inertia and reactance on 100 MVA common base, respectively, are 100, 0.4 4, 0.4 4, 10 100, 10 100, 0.4 4, 0.4 4, 10 100, 10 ANSWER DOWNLOAD EXAMIANS APP
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