Heat Transfer Thermal conductivity of a gas at low density, __________ with increase in temperature. Decreases Increases May increase or decrease; depends on the gas Remains unchanged Decreases Increases May increase or decrease; depends on the gas Remains unchanged ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For shell and tube heat exchanger, with increasing heat transfer area, the purchased cost per unit heat transfer area Passes through a maxima Remains constant Decreases Increases Passes through a maxima Remains constant Decreases Increases ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A steel sphere of radius 0.1 m at 400°K is immersed in an oil at 300°K. If the centre of the sphere reaches 350°K in 20 minutes, how long will it take for a 0.05 m radius steel sphere to reach the same temperature (at the centre) under identical conditions ? Assume that the conductive heat transfer co-efficient is infinitely large. 40 minutes 5 minutes 10 minutes 20 minutes 40 minutes 5 minutes 10 minutes 20 minutes ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Steam economy in case of a triple effect evaporator will be Between 0 and 1 > 1 1 < 1 Between 0 and 1 > 1 1 < 1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Crystallisation of solids from a homogeneous solution is a/an __________ process. Highly endothermic Exothermic None of these Mildly endothermic Highly endothermic Exothermic None of these Mildly endothermic ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer As the difference between the wall temperature and bulk temperature increases, the boiling heat transfer co-efficient goes through a minimum goes through a maximum. continues to increase continues to decrease goes through a minimum goes through a maximum. continues to increase continues to decrease ANSWER DOWNLOAD EXAMIANS APP
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