Power Systems Surge impedance loading of a 3-phase, 400 kV transmission line is 400 Ω. The surge impedance loading is 400 MW 800 MW 1600 MW 200 MW 400 MW 800 MW 1600 MW 200 MW ANSWER DOWNLOAD EXAMIANS APP
Power Systems The corona loss on a particular system at 50 Hz is 1 kW/km per phase. What is the corona loss at 60 Hz in kW/km per phase? 0.89 1.13 1 1.25 0.89 1.13 1 1.25 ANSWER DOWNLOAD EXAMIANS APP
Power Systems The neutral of 10 MVA, 11 kV alternator is earthed through a resistance of 5 ohms. The fault ready is set to operate at 0.75 A. The current transformers have a ratio of 1000/5. What is the percentage of the alternator winding is protected? 85% 15% 11.8% 88.2% 85% 15% 11.8% 88.2% ANSWER DOWNLOAD EXAMIANS APP
Power Systems The total number of strands(N) is concentrically stranded cable with total annular space filled with strands of uniform diameter is given by (if x is number of layers) N = 3x²-2x+1 N = 3x²-3x+1 N = 3x²+3x+1 N = 3x²-6x+1 N = 3x²-2x+1 N = 3x²-3x+1 N = 3x²+3x+1 N = 3x²-6x+1 ANSWER DOWNLOAD EXAMIANS APP
Power Systems In load flow studies PV bus is treated as PQ bus when phase angle become high voltage at the bus become high any of the above reactive power goes beyond limit phase angle become high voltage at the bus become high any of the above reactive power goes beyond limit ANSWER DOWNLOAD EXAMIANS APP
Power Systems Objectives of power system is/are Cost of electrical energy per KWh is to be minimum both 1 and 2 Rated voltage and frequency has to be supplied to the consumers nether 1 nor 2 Cost of electrical energy per KWh is to be minimum both 1 and 2 Rated voltage and frequency has to be supplied to the consumers nether 1 nor 2 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS