Heat and Mass Transfer In a heat exchanger with one fluid evaporating or condensing, the surface area required is least in Cross flow Parallel flow All of these Counter flow Cross flow Parallel flow All of these Counter flow ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The thermal diffusivities for solids are generally Less than those for gases More or less same as for liquids and gases Less than those for liquids More than those for liquids and gases Less than those for gases More or less same as for liquids and gases Less than those for liquids More than those for liquids and gases ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The total radiation from a black body per second per unit area is ________ fourth power of the absolute temperature. This statement is known as Stefan Boltzmann law. Directly proportional to Equal to Inversely proportional to None of these Directly proportional to Equal to Inversely proportional to None of these ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The most commonly used method for the design of duct size is the Static regains method Velocity reduction method Equal friction method Dual or double method Static regains method Velocity reduction method Equal friction method Dual or double method ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The transfer of heat by molecular collision is smallest in Solids Gases None of these Liquids Solids Gases None of these Liquids ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The ratio of surface convection resistance to the internal conduction resistance is known as Grashoff number Stanton number Biot number Prandtl number Grashoff number Stanton number Biot number Prandtl number ANSWER DOWNLOAD EXAMIANS APP
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