Power Systems For large plants of capacity for more than 15 MW, what type of cooling is used Liquid. Air. Hydrogen. Water. Liquid. Air. Hydrogen. Water. ANSWER DOWNLOAD EXAMIANS APP
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 8 MJ/MVA 4 MJ/MVA 16 MJ/MVA 2 MJ/MVA 8 MJ/MVA 4 MJ/MVA 16 MJ/MVA 2 MJ/MVA 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 4, 0.4 100, 10 100, 0.4 4, 10 4, 0.4 100, 10 100, 0.4 4, 10 ANSWER DOWNLOAD EXAMIANS APP
Power Systems The positive sequence reactance will be equal to negative sequence if the equipment is transformer and transmission lines. none of these. generator. motor. transformer and transmission lines. none of these. generator. motor. ANSWER DOWNLOAD EXAMIANS APP
Power Systems A transmission line has a reactance of 1 Pu is operating at Vs = Vr = 1 Pu. The generator is connected at source end which is delivering 0.5 Pu of active power. Find the load angle? 60° 35° 30° 45° 60° 35° 30° 45° ANSWER DOWNLOAD EXAMIANS APP
Power Systems A power system network has n nodes, Z33 of its bus impedance matrix is j0.5 pu. The voltage at node 3 is 1.3∠ -10°. If capacitor is having reactance of -j3.5 pu is now added to the network between node 3 and reference node, the current drawn by the capacitor in pu is 0.433∠ 80° 0.725∠ 80° 0.325∠ -100° 0.371∠ -100° 0.433∠ 80° 0.725∠ 80° 0.325∠ -100° 0.371∠ -100° ANSWER DOWNLOAD EXAMIANS APP
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