Power Systems A transmission line has a surge impedance of 400 Ω is connected with the cable having surge impedance of 40 Ω, a surge magnitude of 100 kV is travelling from the transmission line towards the cable. Find the incident current? 200 A 250 A 2500 A 100 A 200 A 250 A 2500 A 100 A ANSWER DOWNLOAD EXAMIANS APP
Power Systems The per unit impedance Z(pu) is given by ZΩ* (MVA)b/((KV)²b *100) ZΩ* (kVA)b/(KV)²b ZΩ* (MVA)b*100/(KV)²b ZΩ* (MVA)b/(KV)²b ZΩ* (MVA)b/((KV)²b *100) ZΩ* (kVA)b/(KV)²b ZΩ* (MVA)b*100/(KV)²b ZΩ* (MVA)b/(KV)²b ANSWER DOWNLOAD EXAMIANS APP
Power Systems To improve the efficiency of thermal power plant ________________ is placed between boiler and turbine. superheater. economizer. air preheater. ash handling point. superheater. economizer. air preheater. ash handling point. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The rate of rise of restricting voltage depends upon the Inductance of the system. Type of CB. Capacitance of the system. Inductance and capacitance of the system. Inductance of the system. Type of CB. Capacitance of the system. Inductance and capacitance of the system. ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 100 MVA alternator operating at full load at 50 Hz. H = 4 MWsec/MVA, Td = 0.5 sec. One of the transmission line is tripped. So that output of generator is reduced to 70 MW. Find the frequency deviation during this time? 0.56 0.92 -0.92 -0.56 0.56 0.92 -0.92 -0.56 ANSWER DOWNLOAD EXAMIANS APP
Power Systems An impulse turbine always operates submerged. is most suited for low head and high discharge power plants. operates by initial complete conversion to kinetic energy. makes use of a draft tube. always operates submerged. is most suited for low head and high discharge power plants. operates by initial complete conversion to kinetic energy. makes use of a draft tube. ANSWER DOWNLOAD EXAMIANS APP
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