Power Systems IF the time of operation of a relay for unity TMS is 10 sec then the time of operation for 0.5 TMS is 5 sec. 10 sec. 20 sec. none of these. 5 sec. 10 sec. 20 sec. none of these. ANSWER DOWNLOAD EXAMIANS APP
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 What is the approximate efficiency of a normal thermal power station? 20-25% 30-40% 45-55% 60-70% 20-25% 30-40% 45-55% 60-70% ANSWER DOWNLOAD EXAMIANS APP
Power Systems Maximum efficiency of modern coal fired steam raising thermal power plants is restricted to about 035 (a low value), mainly because of low steam turbine mechanical efficiency. low alternative efficiency. high energy loss in boiler. high energy loss from turbine exhaust to condenser. low steam turbine mechanical efficiency. low alternative efficiency. high energy loss in boiler. high energy loss from turbine exhaust to condenser. ANSWER DOWNLOAD EXAMIANS APP
Power Systems If all the sequence voltages at the fault point in a power system are equal, then the fault point is a LL LLG LLL LG LL LLG LLL LG ANSWER DOWNLOAD EXAMIANS APP
Power Systems To prevent maloperation of deferentially connected relay while energizing a transformer, the relay restraining coil is biased with 3rd harmonic current. 7th harmonic current. 5th harmonic current. 2nd harmonic current. 3rd harmonic current. 7th harmonic current. 5th harmonic current. 2nd harmonic current. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS