Mass Transfer Quiz 3
1 / 50
Dryer widely used in a textile industry is _______ dryer?
2 / 50
Diffusion in concentrated solutions differs from that in dilute solutions, because of the change in the ________ with the concentration of the solution?
3 / 50
Dry bulb temperature of the gas is ______ the wet bulb temperature?
4 / 50
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 ?
5 / 50
During sensible cooling process ________?
6 / 50
Dried finished product sampled from various parts of a _________ dryer exhibits nonuniformity in the moisture content?
7 / 50
Fenske-Underwood equation used for calculating the minimum number of theoretical plates in distillation column is valid for__________?
8 / 50
During constant rate period, the rate of drying decreases with the________?
9 / 50
Detergent solution is dried to a powder in a __________?
10 / 50
Diffusivity in concentrated solutions differs from that in dilute solutions, because of the changes in ______?
11 / 50
Cox chart, which is useful in the design of distillation column particularly for petroleum hydrocarbons, is a plot of (where, P = vapor pressure, T = temperature) ?
12 / 50
Experimental determination of _________ is done by wetted wall column method?
13 / 50
Drying of a solid involves __________ transfer ?
14 / 50
Diameter of raschig rings used in packed tower in industry is normally around _______ inches?
15 / 50
Dew point of a gas-vapour mixture_______?
16 / 50
During bottling of cold drinks (e.g. Pepsi), the main resistance to mass transfer for the absorption of carbon dioxide in water lies in the_____?
17 / 50
Drift in a cooling tower is _____?
18 / 50
Even though bubble cap towers are very effective for humidification operation, they are not used commonly in industries, because of the__________?
19 / 50
Extraction of penicillin employs a _________ extraction column?
20 / 50
Dew point of an air-water vapor mixture__________?
21 / 50
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 ?
22 / 50
Drying of a wet solid under constant drying conditions means the exposure of the wet solid to the air of constant________?
23 / 50
Cox chart is useful in the design of_____?
24 / 50
Deaeration (removal of O2) of water is done by__________?
25 / 50
Flash distillation is _________?
26 / 50
Desulphurisation of petrol is done in a _______?
27 / 50
Desirable value of absorption factor in an absorber is_____?
28 / 50
During constant rate drying period, vaporisation rate per unit drying surface area _______?
29 / 50
Dimension of mass diffusivity is the same as that of_______?
30 / 50
Design calculation for multiple component distillation is done by__________?
31 / 50
Flash distillation is suitable for the separation of components__________?
32 / 50
Equilibrium-moisture curves of different solids ______ ?
33 / 50
Drying of a wet solid under constant drying conditions means the exposure of the wet solid to the air of constant______?
34 / 50
During drying operation, it is easier to remove the _________ moisture ?
35 / 50
Fenske equation for determining the minimum number of theoretical stages in distillation column holds good, when the__________?
36 / 50
Dorr thickener is an equipment used for_____?
37 / 50
Drying operation under vacuum is carried out to ___________?
38 / 50
Dorr thickener is an equipment used for________?
39 / 50
Dry bulb temperature of unsaturated air is more than its _________ temperature?
40 / 50
Entrainer used in Azeotropic distillation should______?
41 / 50
Fenske equation determines the ___________?
42 / 50
Flash distillation is suitable for separating the constituents of a binary system, which _______?
43 / 50
Decoction refers to the use of solvent_________?
44 / 50
Diameter to height ratio for a raschig ring is_______?
45 / 50
Degree of freedom for leaching and solvent extraction process is_______?
46 / 50
During the constant rate period of drying of a solid ?
47 / 50
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__________?
48 / 50
Critical humidity of a solid salt means the humidity_______?
49 / 50
Danckwerts developed the ______ theory?
50 / 50
Experimental determination of ________ is done by wetted wall column method?
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