Mass Transfer The rough value of diffusion co-efficient of water vapor into air at 25°C may be about __________ cm²/sec. 1.25 2.5 0.0025 0.25 1.25 2.5 0.0025 0.25 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The value of L/mG ratio for economical absorption operation ranges from 2.5 to 3.5 0.5 to 0.8 1.25 to 2.0 0.8 to 1.2 2.5 to 3.5 0.5 to 0.8 1.25 to 2.0 0.8 to 1.2 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer During dehumidification of unsaturated air wet bulb temperature & partial pressure of vapor are not constant. However, during evaporative cooling process with recirculated water supply, the __________ remains constant. None of these Partial pressure of water vapor Relative humidity Wet bulb temperature None of these Partial pressure of water vapor Relative humidity Wet bulb temperature ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer H₂S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H₂S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in metres) corresponding to an operating line given by, y = 5x + 0.001 is 0.56 2 1 1.56 0.56 2 1 1.56 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The change in enthalpy per unit weight of adsorbed gas when adsorbed on gas free or "outgassed" adsorbent to from a definite concentration of adsorbate is called its Integral heat of adsorption Heat of wetting Differential heat of adsorption Heat of normal condensation Integral heat of adsorption Heat of wetting Differential heat of adsorption Heat of normal condensation ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer When adsorption hysteresis is observed, the desorption equilibrium pressure is __________ that obtained by adsorption. Same as Always higher than Dependent on the system; can be either lower or higher than Always lower than Same as Always higher than Dependent on the system; can be either lower or higher than Always lower than ANSWER DOWNLOAD EXAMIANS APP
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