Power Systems The surge impedance of a 400 km long overhead transmission line is 420 Ω. For a 200 km length of the same line, the surge impedance will be 420 Ω 210 Ω 400 Ω 840 Ω 420 Ω 210 Ω 400 Ω 840 Ω ANSWER DOWNLOAD EXAMIANS APP
Power Systems A thermal generating station has an installed capacity of 15 MW and supplies a daily load of 10 MW for 12 hours and 5 MW for remaining 12 hours. If the load factor is 0.8. Find the reserve capacity of the station? 10 MW 18 MW 5 MW 9 MW 10 MW 18 MW 5 MW 9 MW ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following is/are advantages of N-R method? Applicable for large power system network both 1 and 2 Time taken for each iteration is less Number of iterations are less Applicable for large power system network both 1 and 2 Time taken for each iteration is less Number of iterations are less ANSWER DOWNLOAD EXAMIANS APP
Power Systems If the penalty factor of a plant is unity, its incremental transmission loss is None of these 0 -1 1 None of these 0 -1 1 ANSWER DOWNLOAD EXAMIANS APP
Power Systems An unloaded generator with a pre-fault voltage 1 pu has the following sequence impedance: Z0 = j 0.15 pu, Z1 = Z2 = j 0.25 pu The neutral is grounded with a reactance of 0.05 pu. The fault current in pu for single line to ground fault is 2.5 pu 3.75 pu 7.25 pu 4.28 pu 2.5 pu 3.75 pu 7.25 pu 4.28 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following decides the insulation level of 400 kV, EHV line? radio interference lighting voltage switching over voltage skin effect radio interference lighting voltage switching over voltage skin effect ANSWER DOWNLOAD EXAMIANS APP
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