Heat Transfer The absorptivity of a grey body at a given temperature __________ with increasing wavelength of radiation. May increase or decrease ; depends on the material Decreases Increases Remains constant May increase or decrease ; depends on the material Decreases Increases Remains constant ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer 'Fouling factor' used in the design of a multipass shell and tube heat exchanger is a None of these Factor of safety Conversion factor for individual film heat transfer co-efficient to overall heat transfer co-efficient Non-dimensional factor None of these Factor of safety Conversion factor for individual film heat transfer co-efficient to overall heat transfer co-efficient Non-dimensional factor ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In case of a multipass shell and tube heat exchanger, providing a baffle on the shell side __________ the heat transfer rate. Decreases Increases May increase or decrease, depends on the type of baffle Does not affect Decreases Increases May increase or decrease, depends on the type of baffle Does not affect ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The average heat transfer co-efficient over the entire length of the plate (ha) and the local heat transfer co-efficient (hL), in case of heat transfer over a flat plate in lminar zone is related as Ha= 5hL Ha = 0.8hL Ha = hL Ha = 2hL Ha= 5hL Ha = 0.8hL Ha = hL Ha = 2hL ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The rate of heat transfer is a product of overall heat transfer co-efficient, the difference in temperature and the Heat transfer area Heating volume None of these Nusselt number Heat transfer area Heating volume None of these Nusselt number ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Overall heat transfer co-efficient for cooling of hydrocarbons by water is about 50 -100 BTU/hr. ft.2°F 50 -100 W/m² . °K 50 -100 Kcal/hr.m².°C 1000 - 1500 BTU/hr. ft.2°F 50 -100 BTU/hr. ft.2°F 50 -100 W/m² . °K 50 -100 Kcal/hr.m².°C 1000 - 1500 BTU/hr. ft.2°F ANSWER DOWNLOAD EXAMIANS APP
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