Power Systems Which of the following statements is/are true? The elements of each row of a Y bus matrix for load flow studies in power system add up to zero if both 2 and 3 are satisfied if the mutual couplings between transmission lines are absent if the shunt admittances at the buses are ignored always if both 2 and 3 are satisfied if the mutual couplings between transmission lines are absent if the shunt admittances at the buses are ignored always ANSWER DOWNLOAD EXAMIANS APP
Power Systems A guard ring is used in string type insulator having 3 units to improve string efficiency. Find the capacitance of metal link 2 if pin to earth capacitance of each unit is 1 F? 2 F 4 F 0.5 F 1 F 2 F 4 F 0.5 F 1 F ANSWER DOWNLOAD EXAMIANS APP
Power Systems A thermal power station needs space less than that required by the diesel power station of same output. less than that required by a gas turbine power plant of same output. less than that required by atomic power station of the same output. less than that required by hydro-power station of same capacity. less than that required by the diesel power station of same output. less than that required by a gas turbine power plant of same output. less than that required by atomic power station of the same output. less than that required by hydro-power station of same capacity. ANSWER DOWNLOAD EXAMIANS APP
Power Systems In a 220 kV system, the inductance and capacitance up to the circuit breaker location are 25 mH and 0.025 µF respectively. The value of resistor required to be connected across the breaker contacts which will give no transient oscillations, is 25 Ω 250 Ω 500 Ω 1000 Ω 25 Ω 250 Ω 500 Ω 1000 Ω ANSWER DOWNLOAD EXAMIANS APP
Power Systems A transmission line is operating under no load has ABCD parameters B = 100∠90° has a phase shift of 0.2 rad, how much shunt reactor is required for compensation of ferranti effect? 2 mH 15.9 H 15.9 mH 2 H 2 mH 15.9 H 15.9 mH 2 H ANSWER DOWNLOAD EXAMIANS APP
Power Systems If we increase the spacing between the phase conductors, the line capacitance decreases None of these increases remains unaffected decreases None of these increases remains unaffected ANSWER DOWNLOAD EXAMIANS APP
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