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Mass Transfer Quiz 6

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Mass Transfer Quiz 6

1 / 50

In case of liquid-liquid binary diffusion, diffusivity of one constituent into another is not dependent on the___________?

2 / 50

Large quantity of silica gel is normally dried in a __________ dryer?

3 / 50

In distillation columns, the number of bubble caps per tray primarily depends upon the_________?

4 / 50

In the layout plan for a vacuum distillation unit, operating at 60 mm Hg, supported by a barometric condenser, the appropriate place for the location of vacuum drum for collecting the distillate will be_______?

5 / 50

In distillation, overhead product contains ________?

6 / 50

Laboratory determination of the diffusivity of vapor is done by _______ method?

7 / 50

In liquid extraction, if the selectivity is unity, then___________?

8 / 50

In McCabe-Thiele method of theoretical plate calculation for a distillation column, the operating lines of stripping and rectifying sections coincide with the diagonal at _________ reflux ?

9 / 50

In which of the following unit operations, the selectivity is an important parameter ?

10 / 50

In saturated gas, the___________?

11 / 50

It takes 6 hours to dry a wet solid from 50% moisture content to the critical moisture content of 15%. How much longer it will take to dry the solid to 10% moisture content, under the same drying conditions? (The equilibrium moisture content of the solid is 5%) ?

12 / 50

In liquid extraction, if the selectivity is unity, then_____?

13 / 50

In McCabe-Thiele method, at infinite reflux ratio_________?

14 / 50

In case of steam distillation, the steam leaving the liquid is not completely saturated with distillate vapour, because________?

15 / 50

In triangular co-ordinates, the ternary composition point falls _____ of the triangle?

16 / 50

In case of liquids, the binary diffusivity is proportional to (where, T = temperature) _______?

17 / 50

Ion exchange process is similar to_____?

18 / 50

In distillation where q is defined as the moles of liquid flow in the stripping section per mole of feed introduced, for saturated liquid feed______?

19 / 50

In most of the mechanically agitated liquid-liquid extractors, baffles or horizontal compartmental plates are provided, which helps in__________?

20 / 50

In extraction, as the temperature increases, the area of heterogeneity (area covered by binodal curve)_________?

21 / 50

In paper industry, paper is dried in a ______ dryer ?

22 / 50

In case of cooling towers, the ratio of the rates of heat and mass transfer is indicated by the _______ number ?

23 / 50

Leaching of coarse solid lumps is also termed as _______?

24 / 50

In case of unsaturated air______?

25 / 50

In the absorption of ammonia in water, the main resistance to absorption is by the __________ phase?

26 / 50

In stripping section of continuous distillation column, the_________?

27 / 50

In liquid-liquid extraction, the number of phases at plait point is ___________?

28 / 50

In steam distillation, the _______?

29 / 50

Inside the distillation column, the__________?

30 / 50

Large scale drying of wheat is done in a _________ dryer?

31 / 50

In McCabe-Thiele method, at infinite reflux ratio_____?

32 / 50

In case of unsaturated air__________?

33 / 50

In gas-liquid contact operation, the number of ideal stages, N = (xa ? xb)/(xb ? x*b). This is true when the stripping factor ?S? is _________?

34 / 50

In the layout plan for a vacuum distillation unit, operating at 60 mm Hg, supported by a barometric condenser, the appropriate place for the location of vacuum drum for collecting the distillate will be_____?

35 / 50

Langmuir equation is associated with__________?

36 / 50

Inside the distillation columns, the __________?

37 / 50

In case of physical adsorption, the difference between heat of adsorption and heat of normal condensation is___________?

38 / 50

In the desorption of highly soluble gas from the liquid, the main resistance will be in the _______ phase?

39 / 50

In continuous distillation, the internal reflux ratio (Ri) and the external reflux ratio (Re) are related as_______?

40 / 50

In the constant rate period of the rate of drying curve for batch drying,__________?

41 / 50

In case of non-ideal gases and liquids, the molal diffusivity _________?

42 / 50

In extractive distillation, solvent is_______?

43 / 50

In rectifying section of a continuous distillation column, the______?

44 / 50

JD factor for mass transfer is a function of Reynolds number. Mass transfer by molecular diffusion from a single drop to surrounding still air is given by_____?

45 / 50

In case of gases, the binary diffusivity is proportional to (where, P = pressure) ?

46 / 50

In extraction, as the temperature increases, the area of heterogeneity (area covered by binodal curve)______?

47 / 50

In most of the vacuum crystalliser, vacuum is generally produced by means of a_______?

48 / 50

Laboratory determination of the diffusivity of vapor is done by ___________ method?

49 / 50

In case of physical adsorption, the difference between heat of adsorption and heat of normal condensation is__________?

50 / 50

In physical terms, Schmidt number means __________?

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