Power Systems Find the number of insulator discs required in string insulator, if operating voltage is 220 kV and maximum voltage of each disc is 11 kV? 10 21 13 20 10 21 13 20 ANSWER DOWNLOAD EXAMIANS APP
Power Systems The insulation resistance of the 20 km long underground cable is 8 MΩ. Other things being same, the insulation resistance of 10 km long cable will be 8 MΩ 16 MΩ 32 MΩ 4 MΩ 8 MΩ 16 MΩ 32 MΩ 4 MΩ ANSWER DOWNLOAD EXAMIANS APP
Power Systems A pin type insulator has 100 kV puncture voltage. If 10 kV flash over voltage occurred in a transmission line, then find the safety factor of insulator? 10 0.001 1000 0.1 10 0.001 1000 0.1 ANSWER DOWNLOAD EXAMIANS APP
Power Systems What is the correct expression for the electrical power developed by ( 0.763 / 75 ) × WQHη. 75 × 0.736 × WQHη. ( 7 / 75 ) × WQHη. ( 75 / 0.736 ) × WQHη. ( 0.763 / 75 ) × WQHη. 75 × 0.736 × WQHη. ( 7 / 75 ) × WQHη. ( 75 / 0.736 ) × WQHη. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The factor affecting run off are the topography and nature of soil in the catchment area. amount of vegetation and weather condition in the catchment area. rain fall pattern, shape and size of catchment area. all of above. the topography and nature of soil in the catchment area. amount of vegetation and weather condition in the catchment area. rain fall pattern, shape and size of catchment area. all of above. ANSWER DOWNLOAD EXAMIANS APP
Power Systems A lossless power system has to serve a load of 250 MW. There are two generators(G1 and G2) in the system with cost curves C1 and C2 respectively defined as follows: C1 = PG1+0.055P²G1 C2 = 3 PG2 + 0.03 P²G2 Where PG1 and PG2 are the MW injections from generators G1 and G2 respectively. Thus, the minimum cost dispatch will be PG1 = 150 MW and PG2 = 100 MW PG1 = 100 MW and PG2 = 150 MW PG1 = 0 MW and PG2 = 250 MW PG1 = 250 MW and PG2 = 0 MW PG1 = 150 MW and PG2 = 100 MW PG1 = 100 MW and PG2 = 150 MW PG1 = 0 MW and PG2 = 250 MW PG1 = 250 MW and PG2 = 0 MW ANSWER DOWNLOAD EXAMIANS APP
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