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? 20 10 13 21 20 10 13 21 ANSWER DOWNLOAD EXAMIANS APP
Power Systems Frequencies must be same in which of the following line to exchange the power from one place to other place ? Synchronous line No need of same frequency for exchange of power both 1 and 2 Asynchronous line Synchronous line No need of same frequency for exchange of power both 1 and 2 Asynchronous line ANSWER DOWNLOAD EXAMIANS APP
Power Systems Suspension type insulators are used for voltage beyond 230 V 11 kV 33 kV 440 V 230 V 11 kV 33 kV 440 V ANSWER DOWNLOAD EXAMIANS APP
Power Systems Zero sequence currents can flow from a line into a transformer bank if the windings are in delta / delta. ground star / delta. delta / star. star / grounded star. delta / delta. ground star / delta. delta / star. star / grounded star. ANSWER DOWNLOAD EXAMIANS APP
Power Systems When bundle conductor are used in place of single conductor the effective inductance and capacitance will respectively increase and remain unaffected. decrease and remain unaffected. increase and decrease. decrease and increase. increase and remain unaffected. decrease and remain unaffected. increase and decrease. decrease and increase. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The maximum efficiency of modern coal fired steam steam raising thermal power plants is restricted to about 0.35( a low value), mainly because of high energy loss in boilers high energy loss in condenser low alternator efficiency low steam turbine mechanical efficiency high energy loss in boilers high energy loss in condenser low alternator efficiency low steam turbine mechanical efficiency ANSWER DOWNLOAD EXAMIANS APP
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