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? 6 MJ/MVA 2 MJ/MVA 4 MJ/MVA 8 MJ/MVA 6 MJ/MVA 2 MJ/MVA 4 MJ/MVA 8 MJ/MVA ANSWER DOWNLOAD EXAMIANS APP
Power Systems For which one of the following types of motors, is the equal area criterion for stability applicable? DC shunt motor Three phase induction motor Three phase synchronous motor DC series motor DC shunt motor Three phase induction motor Three phase synchronous motor DC series motor ANSWER DOWNLOAD EXAMIANS APP
Power Systems The annual depreciation of hydro power plant is about 0.5 - 1.5 %. 20 - 25 %. 10 - 15 %. 15 - 20 %. 0.5 - 1.5 %. 20 - 25 %. 10 - 15 %. 15 - 20 %. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following power stations is mainly used to cover peak load on the system? coal based thermal power plant nuclear plant gas based thermal power plant pumped storage hydro power plant coal based thermal power plant nuclear plant gas based thermal power plant pumped storage hydro power plant ANSWER DOWNLOAD EXAMIANS APP
Power Systems Consider a three phase, 50 Hz, 11 kV distribution system. Each of the conductors is suspended by an insulator string having two identical porcelain insulators. The self capacitance of the insulators is 5 times the shunt capacitance between the link and ground. Find the voltage across the two insulators V1 and V2? (V1 = Voltage of disc nearest to the conductor) V1 = 2.89 kV and V2 = 3.46 kV V1 = 5 kV and V2 = 6 kV V1 = 3.46 kV and V2 = 2.89 kV V1 = 6 kV and V2 = 5 kV V1 = 2.89 kV and V2 = 3.46 kV V1 = 5 kV and V2 = 6 kV V1 = 3.46 kV and V2 = 2.89 kV V1 = 6 kV and V2 = 5 kV ANSWER DOWNLOAD EXAMIANS APP
Power Systems The charging reactance of 50 km transmission line is 1500 Ω. What is the charging reactance for 100 km length of line? 3000 Ω 1000 Ω 1500 Ω 750 Ω 3000 Ω 1000 Ω 1500 Ω 750 Ω ANSWER DOWNLOAD EXAMIANS APP
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