Power Systems Four identical alternators each are rated for 20 MVA, 11 KV having a subtransient reactance of 16% are working in parallel. The short circuit level at the busbar is 400 MVA 500 MVA 100 MVA 125 MVA 400 MVA 500 MVA 100 MVA 125 MVA ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following is/are the desirable properties of a insulator material? High ratio of puncture strength to flash over. Both 1 and 2 High relative permittivity Low ratio of puncture strength to flash over. High ratio of puncture strength to flash over. Both 1 and 2 High relative permittivity Low ratio of puncture strength to flash over. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The Y bus matrix of 100 bus interconnected system is 90% sparse. Hence the number of transmission lines in the system must be 450 900 500 250 450 900 500 250 ANSWER DOWNLOAD EXAMIANS APP
Power Systems Communications lines are treated as long transmission lines any of the above medium transmission lines short transmission lines long transmission lines any of the above medium transmission lines short transmission lines ANSWER DOWNLOAD EXAMIANS APP
Power Systems A coal fired steam power station working at a plant factor of 80% has one 500 MW generating unit. If the heat content of coal is 2 kWh/kg, the overall plant efficiency is 40% and a train load of coal is 2000 metric tons, then the number of trains required daily for the plant is 16 10 2 6 16 10 2 6 ANSWER DOWNLOAD EXAMIANS APP
Power Systems As the frequency of the system is increased, the charging MVAR decreases None of these remains unaffected increases decreases None of these remains unaffected increases ANSWER DOWNLOAD EXAMIANS APP
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