Mass Transfer Quiz 10
1 / 50
Steam distillation is used for separation of high boiling ______?
2 / 50
The absorption factor is defined as (where, L = liquid flow rate, G = gas flow rate and, m = slope of the equilibrium line) ?
3 / 50
The diffusivity D. in a binary gas mixture is related to the pressure (P) as_____?
4 / 50
The cooling effect in a cooling tower can be speeded up by _________?
5 / 50
The dew point of an unsaturated gas-vapor mixture does not depend upon the ______ of the mixture?
6 / 50
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_______?
7 / 50
The drying time between fixed moisture contents within the ?constant rate period? is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid) ?
8 / 50
The expression, y(1 ? x)/x(1 ? y) is for_______?
9 / 50
The diffusivity, DAB (for component A diffusing in B) is equal to the diffusivity DBA (for component B diffusing in A) for a binary mixture of_________?
10 / 50
The equipment used in the extraction of highly corrosive radioactive liquids is_________?
11 / 50
The commonly used solvent in supercritical extraction is_______?
12 / 50
The change in enthalpy, when a unit quantity of gas is absorbed by relatively large quantity of adsorbent (on which a definite concentration of the adsorbed gas already exists) is termed as the__________?
13 / 50
The cooling effect in a cooling tower cannot be increased by_______?
14 / 50
The apex of an equilateral-triangular coordinate (in ternary liquid system) represents a/an _____?
15 / 50
Steady state temperature reached by a small amount of liquid evaporating into a large amount of unsaturated vapour-gas mixture is called the _________ temperature?
16 / 50
The assumption made in Elis method in distillation is that enthalpy concentration lines of vapor and liquid are ___________?
17 / 50
Steam distillation is used to___________?
18 / 50
The dimension of diffusivity is same as that of the___________? The dimension of diffusivity is same as that of the
19 / 50
The boiling points of pure components of a binary system _________ with increase in total pressure of the system ?
20 / 50
The dew point of an unsaturated gas-vapor mixture does not depend upon the __________ of the mixture?
21 / 50
The diffusivity D. in a binary gas mixture is related to the temperature (T) as__________?
22 / 50
The binary diffusivity in gases and liquids vary respectively as__________?
23 / 50
The binary diffusivity in gases does not depend upon the _____?
24 / 50
The equation, NA = (DAB . Pt /RTZ . PBM) (PA1 ? PA2) is for_________?
25 / 50
Swenson-Walker crystalliser is a ___________ unit ?
26 / 50
The dew point of a saturated gas phase equals the _________ temperature?
27 / 50
Steady state equimolal counter diffusion occurs in case of ______?
28 / 50
The drying time between fixed moisture content within diffusion controlled ?falling rate period? is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid) ?
29 / 50
The binary diffusivity in gases at atmospheric conditions is about _____?
30 / 50
The efficiency of a plate column will be maximum, when the flow is ideal ___________ the plate?
31 / 50
Sticky material can be dried in a _________ dryer ?
32 / 50
The amount of steam required per unit quantity of distillate in case of steam distillation will be reduced by ___________?
33 / 50
The equipment frequently used for adiabatic humidification-cooling operation with recirculating liquid is__________?
34 / 50
The expression, ln(F/W) = ?xF xW [dx/y* ? x)] is_______?
35 / 50
The adiabatic saturation curve for a vapour-gas mixture is___________?
36 / 50
The equation, NA = (DAB . Pt /RTZ) (y1 ? y2) is for _________?
37 / 50
Steam distillation is not recommended to be used, if the _______?
38 / 50
Surface renewal model of mass transfer was enunciated by_____?
39 / 50
The difference of wet bulb temperature and adiabatic saturation temperature of unsaturated mixture of any system is_____?
40 / 50
41 / 50
Stacked packing compared to dumped packing__________?
42 / 50
The diffusion co-efficient in m2/s. of acetic acid in benzene (liquid in liquid) is_____?
43 / 50
Stefan?s law describes the mass transfer by_________?
44 / 50
The diffusivity D. in a binary gas mixture is related to the pressure (P) as___________?
45 / 50
The critical moisture content in case of drying indicates the _________ rate period?
46 / 50
The caking of crystals can be prevented by _______?
47 / 50
The ?shanks system? of leaching (i.e., counter-current multiple contact leaching) is used for______?
48 / 50
Steady state equimolal counter diffusion is encountered in_______?
49 / 50
The critical moisture content in case of drying indicates the ________ rate period?
50 / 50
Tea percolation employs______?
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