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Mass Transfer Quiz 10

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Mass Transfer Quiz 10

1 / 50

The efficiency of a plate column will be maximum, when the flow is ideal ___________ the plate?

2 / 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__________?

3 / 50

The equipment used in the extraction of highly corrosive radioactive liquids is_________?

4 / 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) ?

5 / 50

The dew point of an unsaturated gas-vapor mixture does not depend upon the ______ of the mixture?

6 / 50

The equipment frequently used for adiabatic humidification-cooling operation with recirculating liquid is__________?

7 / 50

The dew point of an unsaturated gas-vapor mixture does not depend upon the __________ of the mixture?

8 / 50

Steam distillation is used for separation of high boiling ______?

9 / 50

The critical moisture content in case of drying indicates the _________ rate period?

10 / 50

The expression, ln(F/W) = ?xF xW [dx/y* ? x)] is_______?

11 / 50

Swenson-Walker crystalliser is a ___________ unit ?

12 / 50

The absorption factor is defined as (where, L = liquid flow rate, G = gas flow rate and, m = slope of the equilibrium line) ?

13 / 50

Stefan?s law describes the mass transfer by_________?

14 / 50

The binary diffusivity in gases at atmospheric conditions is about _____?

15 / 50

Tea percolation employs______?

16 / 50

The binary diffusivity in gases and liquids vary respectively as__________?

17 / 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?

18 / 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) ?

19 / 50

Sticky material can be dried in a _________ dryer ?

20 / 50

The boiling points of pure components of a binary system _________ with increase in total pressure of the system ?

21 / 50

The cooling effect in a cooling tower can be speeded up by _________?

22 / 50

The diffusivity D. in a binary gas mixture is related to the pressure (P) as___________?

23 / 50

Surface renewal model of mass transfer was enunciated by_____?

24 / 50

The amount of steam required per unit quantity of distillate in case of steam distillation will be reduced by ___________?

25 / 50

The critical moisture content in case of drying indicates the ________ rate period?

26 / 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_______?

27 / 50

Steam distillation is used to___________?

28 / 50

The diffusion co-efficient in m2/s. of acetic acid in benzene (liquid in liquid) is_____?

29 / 50

Stacked packing compared to dumped packing__________?

30 / 50

The ?shanks system? of leaching (i.e., counter-current multiple contact leaching) is used for______?

31 / 50

The dew point of a saturated gas phase equals the _________ temperature?

32 / 50

The cooling effect in a cooling tower cannot be increased by_______?

33 / 50

The difference of wet bulb temperature and adiabatic saturation temperature of unsaturated mixture of any system is_____?

34 / 50

The adiabatic saturation curve for a vapour-gas mixture is___________?

35 / 50

Steam distillation is not recommended to be used, if the _______?

36 / 50

The binary diffusivity in gases does not depend upon the _____?

37 / 50

The dimension of diffusivity is same as that of the___________? The dimension of diffusivity is same as that of the

38 / 50

The commonly used solvent in supercritical extraction is_______?

39 / 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_________?

40 / 50

The expression, y(1 ? x)/x(1 ? y) is for_______?

41 / 50

Steady state equimolal counter diffusion occurs in case of ______?

42 / 50

The diffusivity D. in a binary gas mixture is related to the temperature (T) as__________?

43 / 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) ?

44 / 50

The equation, NA = (DAB . Pt /RTZ . PBM) (PA1 ? PA2) is for_________?

45 / 50

The caking of crystals can be prevented by _______?

46 / 50

The equation, NA = (DAB . Pt /RTZ) (y1 ? y2) is for _________?

47 / 50

The apex of an equilateral-triangular coordinate (in ternary liquid system) represents a/an _____?

48 / 50

Steady state equimolal counter diffusion is encountered in_______?

49 / 50

The assumption made in Elis method in distillation is that enthalpy concentration lines of vapor and liquid are ___________?

50 / 50

The diffusivity D. in a binary gas mixture is related to the pressure (P) as_____?

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