Power Systems A 100 MVA alternator operating at full load at 50 Hz. H = 4 MWsec/MVA, Td = 0.5 sec. One of the transmission line is tripped. So that output of generator is reduced to 70 MW. Find the frequency deviation during this time? -0.56 -0.92 0.92 0.56 -0.56 -0.92 0.92 0.56 ANSWER DOWNLOAD EXAMIANS APP
Power Systems The characteristic impedance of a transmission line is Independent of its length. Inversely proportional to square root of its length. Directly proportional to square root of its length. Directly proportional to its length. Independent of its length. Inversely proportional to square root of its length. Directly proportional to square root of its length. Directly proportional to its length. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Load frequency control is achieved by properly matching the individual machines reactive powers. turbine inputs. generator ratings. generated voltages. reactive powers. turbine inputs. generator ratings. generated voltages. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The line currents of 3-phase supply are: IR = 3 + j 5 A IY =2 + j 2 A IB = -2 - j 1 A The zero sequence current will be 1 + j 2 A -2 - j 1 A 5 + j 7 A 1 + j 4 A 1 + j 2 A -2 - j 1 A 5 + j 7 A 1 + j 4 A ANSWER DOWNLOAD EXAMIANS APP
Power Systems Characteristics of arc quenching medium is/are Non flammable All of these High dielectric strength High thermal conductivity Non flammable All of these High dielectric strength High thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
Power Systems Half life is defined as the time required for full of atoms in a specimen disintegrate. none of above. the time required to spiliting of a heavy nucleus. the time required for one half of isotope to decay. the time required for full of atoms in a specimen disintegrate. none of above. the time required to spiliting of a heavy nucleus. the time required for one half of isotope to decay. ANSWER DOWNLOAD EXAMIANS APP
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