Power Systems Which one of the following relays has the capability of anticipating the possible major fault in a transformer? Over fluxing relay Buchholz relay Differential relay Over current relay Over fluxing relay Buchholz relay Differential relay Over current relay ANSWER DOWNLOAD EXAMIANS APP
Power Systems A thermal protection relay provides protection against what? Over load any of the above Short circuit Temperature Over load any of the above Short circuit Temperature ANSWER DOWNLOAD EXAMIANS APP
Power Systems The pu parameters for a 500 MVA machine on its own base are: Inertia, H = 20 pu; reactance X = 2 pu. The pu values of inertia and reactance on 100 MVA common base, respectively, are 100, 10 4, 10 4, 0.4 100, 0.4 100, 10 4, 10 4, 0.4 100, 0.4 ANSWER DOWNLOAD EXAMIANS APP
Power Systems The function of a surge tank is to supply water at constant pressure. none of above. produce surge in the pipeline. relieve water hammer pressure in the penstock. supply water at constant pressure. none of above. produce surge in the pipeline. relieve water hammer pressure in the penstock. ANSWER DOWNLOAD EXAMIANS APP
Power Systems For some given transmission line the expression for voltage regulation is given by (Vs - Vr)/Vr *100%. Hence, this must be a short line this expression is true for any line this may either be a medium line or short line None of these this must be a short line this expression is true for any line this may either be a medium line or short line None of these ANSWER DOWNLOAD EXAMIANS APP
Power Systems In Rankine cycle, the work output from a turbine is given by change of enthalpy between inlet and outlet. change in internal energy between inlet and outlet. change of entropy between inlet and outlet. change in temperature between inlet and outlet. change of enthalpy between inlet and outlet. change in internal energy between inlet and outlet. change of entropy between inlet and outlet. change in temperature between inlet and outlet. ANSWER DOWNLOAD EXAMIANS APP
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