Power Systems Which of the following represents the transmission or reflection coefficient of voltage Tv? (Zl = Surge impedance of load, Zs = Surge impedance of line) (Zs - Zl)/(Zs + Zl) 2Zl/(Zs + Zl) (Zl - Zs)/(Zs + Zl) 2Zs/(Zs + Zl) (Zs - Zl)/(Zs + Zl) 2Zl/(Zs + Zl) (Zl - Zs)/(Zs + Zl) 2Zs/(Zs + Zl) ANSWER DOWNLOAD EXAMIANS APP
Power Systems A Pelton wheel turbine having a rated speed of 300 rpm is connected to an alternator to produce power at 50 Hz. The number of poles required in the alternator is 4 10 20 8 4 10 20 8 ANSWER DOWNLOAD EXAMIANS APP
Power Systems The per unit value of a 2 ohm resistor at 100 MVA and 10 kV base voltage is 2 pu 0.2 pu 0.5 pu 4 pu 2 pu 0.2 pu 0.5 pu 4 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems The ABCD constants of a 3-phase transmission line are A = D = 0.8∠1°, B = 170∠85° Ω , C = 0.002∠90.4° ℧. The sending end voltage is 400 kV. The receiving end voltage under no load condition is 350 kV 400 kV 600 kV 500 kV 350 kV 400 kV 600 kV 500 kV ANSWER DOWNLOAD EXAMIANS APP
Power Systems Surge impedance loading of a 3-phase, 400 kV transmission line is 400 Ω. The surge impedance loading is 200 MW 800 MW 400 MW 1600 MW 200 MW 800 MW 400 MW 1600 MW ANSWER DOWNLOAD EXAMIANS APP
Power Systems To protect the power transformer ( Y-Y with neutral grounded) against fault, which type of connection do the current transformers have? Δ-Y connection Y-Δ connection Y-Y connection Δ-Δ connection Δ-Y connection Y-Δ connection Y-Y connection Δ-Δ connection ANSWER DOWNLOAD EXAMIANS APP
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