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
Power Systems The function of a surge tank is to relieve water hammer pressure in the penstock. produce surge in the pipeline. supply water at constant pressure. none of above. relieve water hammer pressure in the penstock. produce surge in the pipeline. supply water at constant pressure. none of above. ANSWER DOWNLOAD EXAMIANS APP
Power Systems How to find the total number of strands (N) when number of layers (x) are given Total number of strands N = 3x² + 3x - 1 Total number of strands N = 3x² + 3x + 1 Total number of strands N = 3x² - 3x - 1 Total number of strands N = 3x² - 3x + 1 Total number of strands N = 3x² + 3x - 1 Total number of strands N = 3x² + 3x + 1 Total number of strands N = 3x² - 3x - 1 Total number of strands N = 3x² - 3x + 1 ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following represents the sag(S) of a transmission line? S = wl²/16T S = wl²/4T S = wl²/2T S = wl²/8T S = wl²/16T S = wl²/4T S = wl²/2T S = wl²/8T ANSWER DOWNLOAD EXAMIANS APP
Power Systems A string type insulator has three units with self capacitance C and ground capacitance of 0.2 C having a string efficiency of 80% 82% 76% 78% 80% 82% 76% 78% ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 3-phase, 110 kV coaxial XLPE insulated power cable delivering power at 50 Hz, has a capacitance of 125 nF/km. If the dielectric loss tangent of XLPE is 2*10^-4, then dielcetric power loss in this cable in W/km/phase is 38.6 31.7 23.9 35.45 38.6 31.7 23.9 35.45 ANSWER DOWNLOAD EXAMIANS APP
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