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 2 MJ/MVA 4 MJ/MVA 16 MJ/MVA 8 MJ/MVA 2 MJ/MVA 4 MJ/MVA 16 MJ/MVA 8 MJ/MVA ANSWER DOWNLOAD EXAMIANS APP
Power Systems A thermal protection relay provides protection against what? Over load Short circuit any of the above Temperature Over load Short circuit any of the above Temperature ANSWER DOWNLOAD EXAMIANS APP
Power Systems What type of back up protection is used for alternators? Buchholz relay. Impedance relay. IDMT relay. Mho relay. Buchholz relay. Impedance relay. IDMT relay. Mho relay. ANSWER DOWNLOAD EXAMIANS APP
Power Systems If, for a given alternator in economic operation mode, the incremental cost is given by (0.012 P + 8) Rs/MWh, dPL/dP = 0.2 and plant λ = 25, then power generation is 1000 MW 1500 MW 1250 MW 750 MW 1000 MW 1500 MW 1250 MW 750 MW ANSWER DOWNLOAD EXAMIANS APP
Power Systems What will be the ratio of the C.T. on the H.V side of a 3 - φ star / delta 33 / 11 kV transformer if the protecting CT on the LV side has a ratio of 300 : 5 ? 100 : 5 / √3. 120 : 6 / √3. 150 : 4 / √3. 200 : 5 / √3. 100 : 5 / √3. 120 : 6 / √3. 150 : 4 / √3. 200 : 5 / √3. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of following is a medium and low head turbines Francis and Kaplan turbines. None of above. Pelton and Kaplan turbines. Kaplan and Francis turbines. Francis and Kaplan turbines. None of above. Pelton and Kaplan turbines. Kaplan and Francis turbines. ANSWER DOWNLOAD EXAMIANS APP
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