Power Systems A string insulator has 4 units. The voltage across bottom most unit is 10 kV and its efficiency is 90%. Find the total operating phase voltage? 32 kV 36 kV 45 kV 40 kV 32 kV 36 kV 45 kV 40 kV ANSWER DOWNLOAD EXAMIANS APP
Power Systems A transmission line has self and mutual impedances are 0.8 and 0 pu respectively. Find the positive, negative and zero sequence impedances respectively? 0.8, 0.8 and 0.8 pu 0.6, 0.8 and 1.2 pu 0.6, 0.6 and 0.6 pu 0.6, 0.6 and 1.2 pu 0.8, 0.8 and 0.8 pu 0.6, 0.8 and 1.2 pu 0.6, 0.6 and 0.6 pu 0.6, 0.6 and 1.2 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems To improve the efficiency of thermal power plant ________________ is placed between boiler and turbine. air preheater. superheater. economizer. ash handling point. air preheater. superheater. economizer. ash handling point. 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
Power Systems The factor affecting run off are rain fall pattern, shape and size of catchment area. the topography and nature of soil in the catchment area. all of above. amount of vegetation and weather condition in the catchment area. rain fall pattern, shape and size of catchment area. the topography and nature of soil in the catchment area. all of above. amount of vegetation and weather condition in the catchment area. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following statements is/are true? The elements of each row of a Y bus matrix for load flow studies in power system add up to zero if the shunt admittances at the buses are ignored always if the mutual couplings between transmission lines are absent if both 2 and 3 are satisfied if the shunt admittances at the buses are ignored always if the mutual couplings between transmission lines are absent if both 2 and 3 are satisfied ANSWER DOWNLOAD EXAMIANS APP
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