Heat Transfer The average heat transfer co-efficient for laminar film condensation on vertical surface is inversely proportional to (where, ΔT = Temperature drop across condensate film ) None of the listed here ΔT (ΔT)1/4 (ΔT)2 None of the listed here ΔT (ΔT)1/4 (ΔT)2 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 More space None of these Less heating surface Lower maintenance cost More space None of these Less heating surface Lower maintenance cost ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The main purpose of providing fins on heat transfer surface is to increase the Heat transfer area Mechanical strength of the equipment Heat transfer co-efficient Temperature gradient Heat transfer area Mechanical strength of the equipment Heat transfer co-efficient Temperature gradient ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat transfer by __________ may not necessarily require the presence of a medium natural convection radiation none of the listed here coduction natural convection radiation none of the listed here coduction ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer 1000 Kg of liquid at 30°C in a well stirred vessel has to be heated to 120°C, using immersed coils carrying condensing steam at 150°C. The area of the steam coils is 1.2 m² and the overall heat transfer co-efficient to the liquid is 1500 W/m².°C. Assuming negligible heat loss to the surrounding and specific heat capacity of the liquid to be 4 kJ/kg.°C, the time taken for the liquid to reach desired temperature will be 44 min 15 min 51 min 22 min 44 min 15 min 51 min 22 min ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A cube, sphere & a thin circular plate (all having same mass and made of same material) are all heated to 300°C and allowed to cool in natural air. Which one will cool the slowest ? All of these Plate Sphere Cube All of these Plate Sphere Cube ANSWER DOWNLOAD EXAMIANS APP
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