Power Systems For transmission line which one of the following relation is true? AD + BC = 0 AD - BC = 1 AD - BC = 0 AD - BC = -1 AD + BC = 0 AD - BC = 1 AD - BC = 0 AD - BC = -1 ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 3-phase transmission line operating at Vs = 400 kV and has ABCD parameters A= D = 0.8∠0°, B = 100∠90° Ω, C = 0.5*10^-6∠90° ℧. Find the shunt reactor required for compensating ferranti effect? 3000 Ω 1500 Ω 500 Ω 2000 Ω 3000 Ω 1500 Ω 500 Ω 2000 Ω ANSWER DOWNLOAD EXAMIANS APP
Power Systems The draft tube is provided to raise the water surface of the stream to create an artificial head. None of these increase the acting head on the water wheel. reduce the effect of water hammer. raise the water surface of the stream to create an artificial head. None of these increase the acting head on the water wheel. reduce the effect of water hammer. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following contributes to the Rankine cycle efficiency improvement in a thermal power plant All of these Use of high pressure. Reheat of steam an intermediate stages. Use of steam for heating of boiler feed water. All of these Use of high pressure. Reheat of steam an intermediate stages. Use of steam for heating of boiler feed water. ANSWER DOWNLOAD EXAMIANS APP
Power Systems To improve the efficiency of thermal power plant ________________ is placed between boiler and turbine. superheater. air preheater. ash handling point. economizer. superheater. air preheater. ash handling point. economizer. ANSWER DOWNLOAD EXAMIANS APP
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 500 MVA 125 MVA 400 MVA 100 MVA 500 MVA 125 MVA 400 MVA 100 MVA ANSWER DOWNLOAD EXAMIANS APP
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