Power Systems Find the surge impedance of a line when inductance is 160 mH and capacitance is 1µF? 800 Ω 160 Ω 400 Ω 200 Ω 800 Ω 160 Ω 400 Ω 200 Ω ANSWER DOWNLOAD EXAMIANS APP
Power Systems Two generating stations delivering a powers of P1 = 150 MW, P2 =100 MW and the B coefficients are B11 = 0.005, B22 = 0.002, B12=B21= -0.001. Find the transmission line losses? 105.2 85.5 95.5 102.5 105.2 85.5 95.5 102.5 ANSWER DOWNLOAD EXAMIANS APP
Power Systems To prevent maloperation of deferentially connected relay while energizing a transformer, the relay restraining coil is biased with 2nd harmonic current. 3rd harmonic current. 7th harmonic current. 5th harmonic current. 2nd harmonic current. 3rd harmonic current. 7th harmonic current. 5th harmonic current. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The daily energy produced in thermal power station is 720 MWh at a load factor of 0.6. What is the maximum demand of the station? 50 MW 720 MW 30 MW 72 MW 50 MW 720 MW 30 MW 72 MW 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? 1 F 4 F 0.5 F 2 F 1 F 4 F 0.5 F 2 F ANSWER DOWNLOAD EXAMIANS APP
Power Systems What type of back up protection is used for alternators? Impedance relay. IDMT relay. Mho relay. Buchholz relay. Impedance relay. IDMT relay. Mho relay. Buchholz relay. ANSWER DOWNLOAD EXAMIANS APP
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