Heat Transfer Multipass heat exchangers are used To reduce the pressure drop To obtain higher heat transfer co-efficient and shorter tube For low heat load Because of simplicity of fabrication To reduce the pressure drop To obtain higher heat transfer co-efficient and shorter tube For low heat load Because of simplicity of fabrication ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A concentric double pipe heat exchanger as compared to the shell and tube heat exchanger for the same heat load requires Lower maintenance cost More space None of these Less heating surface Lower maintenance cost More space None of these Less heating surface ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a shell and tube heat exchanger, floating head is used for Low pressure drop High heat transfer co-efficient Large temperature differentials Less corrosion of tubes Low pressure drop High heat transfer co-efficient Large temperature differentials Less corrosion of tubes ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A long iron rod initially at a temperature of 20°C has one end dipped in boiling water (100°C) at time, t = 0. The curved surface of the rod is insulated so that heat conduction is one dimensional in the axial direction. The temperature at a distance 100 mm from the dipped end becomes 40°C at time, t = 200 s. The same temperature is achieved at a distance of 200 mm from the dipped end at time t = 283 s t = 356 s t = 400 s t = 800 s t = 283 s t = 356 s t = 400 s t = 800 s ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The equivalent diameter for pressure drop is __________ that for heat transfer smaller than greater than equal to None of the listed here smaller than greater than equal to None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Convective heat transfer co-efficient in case of fluid flowing in tubes is not affected by the tube length/diameter ratio, if the flow is in the __________ zone. transition highly turbulent laminar None of the listed here transition highly turbulent laminar None of the listed here ANSWER DOWNLOAD EXAMIANS APP
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