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Corresponding to Nusselt number in heat transfer, the dimensionless group in mass transfer is the ________________ number?
Related MCQs
Cox chart is useful in the design of__________?
The binary diffusivity in gases and liquids vary respectively as__________?
Decoction refers to the use of solvent__________?
Ordinary diffusion process is also called __________ diffusion?
Out of the following gas-liquid contacting devices, for a given set of operating conditions, gas pressure drop is the least in __________ tower?
The solvent used in liquid-liquid extraction should have __________ less than one?
Which of the following equipments is not used for liquid dispersion ?
Diffusion co-efficient generally depends upon the temperature, pressure & the nature of the components of the system. Its dimension is not the same as that of the__________?
Schmidt number and Lewis number for pure air at atmospheric conditions are respectively__________?
The falling rate period in the drying of a solid is characterised by__________?
Azeotropism for ethyl alcohol-water system disappears by__________?
In a liquid-liquid extraction, 10 kg of a solution containing 2 kg of solute C and 8 kg of solvent A is brought into contact with 10 kg of solvent B. Solvent A and B are completely immiscible in each other whereas solute C is soluble in both the solvents. The extraction process attains equilibrium. The equilibrium relationship between the two phases is Y* = 0.9X, where Y* is the kg of C/kg of B and X is kg of C/kg of A. Choose the correct answer?
Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (yin = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (yin/yout).For 98% recovery of acetone, the number of trays required is/are ?
Sand is dried in foundries in a __________drier?
Binary distillation involves the mass transfer by __________ at the gas-liquid interface?
Which of the following adsorbent is used to decolourise yellow glycerine ?
Surface renewal model of mass transfer was enunciated by__________?
If Rm is the minimum reflux ratio, the optimum reflux ratio may be around __________ Rm ?
__________ number indicates the ratio of the rates of the heat and mass transfer incase of a cooling tower?
Gaseous diffusivity at atmospheric pressure is of the order of __________ cm2/second?
Drift in a cooling tower is __________?
HETP is numerically equal to HTU, only when the operating line __________?
At a given equilibrium pressure, with increase in temperature, the concentration of adsorbed gas on solid adsorbent __________?
Equilibrium moisture of a solid is equal to the total moisture minus free moisture. Which of the following substances will have maxi-mum equilibrium moisture ?
Unsaturated air (with dry bulb and wet bulb temperatures being 45°C and 25°C respectively) is passed through a water spray chamber maintained at 23°C. The air will be cooled and __________?
Components, having widely different boiling point in a binary mixture, can be separated using __________ distillation?
Humid volume is the total volume in m3 of 1 kg of __________?
Which of the following is a suitable absorbent for removal of H2S from natural gas ?
In case of non-ideal gases and liquids, the molal diffusivity __________?
Unit of molal diffusivity is__________?
Milk is dried usually in a __________ dryer?
Penetration model (theory) for mass transfer was enunciated by __________?
For an absorber, both equilibrium and operating line will be straight for __________?
An air-water vapour mixture has a dry bulb temperature of 60°C and a dew point temperature of 40°C. The total pressure is 101.3 kPa and the vapour pressure of water at 40°C and 60°C are 7.30 kPa and 19.91 kPa respectively. The humidity of air sample expressed as kg of water vapour/kg of dry air is__________?
Advantage of continuous drying over batch drying is that the__________?
The relative saturation of an unsaturated mixture of gas and vapor is independent of the__________?
In case of liquids, the binary diffusivity is proportional to (where, T = temperature) __________?
Hypersorption refers to a __________ process?
Moisture contained by a substance in excess of the equilibrium moisture is called the __________ moisture?
In case of __________ distillation, a solvent is added to alter the relative volatility of the mixture to be separated?
If the specific heats of a gas and a vapor are 0.2KJ/Kg.°K and 1.5 KJ/Kg.°K respectively, and the humidity is 0.01; the humid heat in KJ/°Kg. is__________?
If the path of liquid across the plate is very long as in case of large diameter tower, Murphree efficiency can be __________ percent?
McCabe-Thiele method__________?
The relation, Sc = Pr = 1, is valid, when the mechanism of __________ transfer is same?
Dew point of an air-water vapor mixture__________?
The value of Lewis number (Le = Sc/Pr) for air-water vapour system is around__________?
Unsaturated air (with dry bulb temperature and dew point being 35°C and 18°C respectively) is passed through a water spray chamber maintained at 15°C. The air will be cooled__________?
The equilibrium liquid composition compared to the vapor composition in case of__________?
Dry bulb temperature of the gas is __________ the wet bulb temperature?
Which of the following is not a unit of mass transfer co-efficient ?
The value of NA/(NA + NB), for steady state equimolal counter diffusion of two gases ‘A’ and ‘B’ is__________?
Corresponding to Nusselt number in heat transfer, the dimensionless group in mass transfer is the ________________ number?
A. Sherwood
B. Schmidt
C. Peclet
D. Stanton
Correct Answer:
Sherwood
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Last Updated:
February 17, 2019