Heat Transfer The main purpose of providing fins on heat transfer surface is to increase the Temperature gradient Mechanical strength of the equipment Heat transfer co-efficient Heat transfer area Temperature gradient Mechanical strength of the equipment Heat transfer co-efficient Heat transfer area ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For the same heat load and mass flow rate in the tube side of a shell and tube heat exchanger, one may use multipass on the tube side, because it Increases the overall heat transfer coefficient None of these Decreases the pressure drop Decreases the outlet temperature of cooling medium Increases the overall heat transfer coefficient None of these Decreases the pressure drop Decreases the outlet temperature of cooling medium ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A composite wall consists of two plates A and B placed in series normal to the flow of heat. The thermal conductivities are kA and kB and the specific heat capacities are CPA and CPB for plates A and B respectively. Plate B has twice the thickness of plate A. At steady state, the temperature difference across plate A is greater than that across plate B, when CPA > CPB KA>2 kB CPA < CPB KA < 0.5kB CPA > CPB KA>2 kB CPA < CPB KA < 0.5kB ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Steam trap is used to None of these Stop the supply of steam Condense the steam flowing in the pipeline Remove water resulting from partial condensation of steam None of these Stop the supply of steam Condense the steam flowing in the pipeline Remove water resulting from partial condensation of steam ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In forced convection, the Nusselt number is a function of Pr and Gr Re and Pr Re and Sc Re and Gr Pr and Gr Re and Pr Re and Sc Re and Gr ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For concentrating an aqueous solution of a material like anhydrous Na₂SO₄, whose solubility decreases with rise in temperature, the most suitable evaporator is a __________ evaporator. Vacuum None of these Backward feed High pressure Vacuum None of these Backward feed High pressure ANSWER DOWNLOAD EXAMIANS APP
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