Power Systems A hydro power plant of run off river type should be provided with pondage so that the firm capacity of plant is increased. operating head is controlled. pressure inside the turbine casing remains. kinetic energy of the running water is fully utilized. firm capacity of plant is increased. operating head is controlled. pressure inside the turbine casing remains. kinetic energy of the running water is fully utilized. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Plug setting of a relay can be altered by varying air gap of magnetic path. adjustable back up stop. none of these. no. of ampere-turns. air gap of magnetic path. adjustable back up stop. none of these. no. of ampere-turns. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Breaking current is a ------------------ value? average any of the above maximum RMS average any of the above maximum RMS ANSWER DOWNLOAD EXAMIANS APP
Power Systems The use of high speed circuit breakers improves system stability. reduces the short circuit current. increased the short circuit current. decrease system stability. improves system stability. reduces the short circuit current. increased the short circuit current. decrease system stability. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The per unit impedance Z(pu) is given by ZΩ* (MVA)b/(KV)²b ZΩ* (kVA)b/(KV)²b ZΩ* (MVA)b/((KV)²b *100) ZΩ* (MVA)b*100/(KV)²b ZΩ* (MVA)b/(KV)²b ZΩ* (kVA)b/(KV)²b ZΩ* (MVA)b/((KV)²b *100) ZΩ* (MVA)b*100/(KV)²b 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 0.371∠ -100° 0.325∠ -100° 0.725∠ 80° 0.433∠ 80° 0.371∠ -100° 0.325∠ -100° 0.725∠ 80° 0.433∠ 80° ANSWER DOWNLOAD EXAMIANS APP
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