Power Systems Four identical alternators each are rated for 20 MVA, 11 KV having a subtransient reactance of 16% are working in parallel. The short circuit level at the busbar is 500 MVA 125 MVA 400 MVA 100 MVA 500 MVA 125 MVA 400 MVA 100 MVA ANSWER DOWNLOAD EXAMIANS APP
Power Systems The angular moment of 10 MVA generator is 0.2. Find the new value of angular moment for 20 MVA base? 0.2 pu 0.1 pu 0.25 pu 0.4 pu 0.2 pu 0.1 pu 0.25 pu 0.4 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 25 MVA, 11 kV alternator is supplying full load at a point of 0.75 lagging. Determine the percentage increase in earning capacity when it is operated at improved power factor of 0.96 lagging. 28 %. 14 %. 56 %. None of above 28 %. 14 %. 56 %. None of above ANSWER DOWNLOAD EXAMIANS APP
Power Systems Plug setting of a relay can be altered by varying no. of ampere-turns. none of these. adjustable back up stop. air gap of magnetic path. no. of ampere-turns. none of these. adjustable back up stop. air gap of magnetic path. 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 16 MΩ 4 MΩ 32 MΩ 8 MΩ 16 MΩ 4 MΩ 32 MΩ 8 MΩ ANSWER DOWNLOAD EXAMIANS APP
Power Systems The skin effect shows that current density is more at the surface of the condutor current density is more at the centre of the condutor current density is lower at the surface of the condutor the distribution of AC current is uniform through the cross section of the conductor current density is more at the surface of the condutor current density is more at the centre of the condutor current density is lower at the surface of the condutor the distribution of AC current is uniform through the cross section of the conductor ANSWER DOWNLOAD EXAMIANS APP
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