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Mass Transfer Quiz 4

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Mass Transfer Quiz 4

1 / 50

For the same system, if the same liquid used in an absorber is decreased, the tower height will___________?

2 / 50

Flooding in a column results due to_____?

3 / 50

For a fixed number of ideal stages in a distillation column, as the reflux ratio is increased, the difference in composition between the top and bottom product streams___________?

4 / 50

For a ternary mixture, in which equilateral triangular co-ordinate is used in leaching and extraction, a ________ of the equilateral triangular co-ordinates?

5 / 50

For absorbing a sparingly soluble gas in a liquid, the_______?

6 / 50

For a ternary mixture, in which equilateral triangular co-ordinate is used in leaching and extraction, a _____ of the equilateral triangular co-ordinates?

7 / 50

Free flowing granular materials can be best dried in a ___________ drier?

8 / 50

Heat sensitive materials with very high latent heat of vaporisation may be economically separated using___________?

9 / 50

High pressure at the bottom of a distillation tower handling heat sensitive materials results in______?

10 / 50

For absorbers, high pressure drop results in_____?

11 / 50

For stripping of a gas in a counter current stripper, the operating line _______?

12 / 50

Fractional solvent extraction________?

13 / 50

For experimental determination of mass transfer co-efficient by wetted wall tower, the mass transfer area is_____?

14 / 50

For water-ethanol system, the minimum reflux ratio_______?

15 / 50

Freundlich equation applies to the adsorption of solute from_______?

16 / 50

For the case of flow of air past a wet bulb thermometer (air water vapour system), the approximate value of h2/ky.Cz is around______?

17 / 50

For a distillation column operating at minimum reflux, the_________?

18 / 50

High pressure at the bottom of a distillation tower handling heat sensitive materials results in _______?

19 / 50

Heat in BTU necessary to increase the temperature of 1 lb of gas and its accompanying vapour by 1?F is called the_________?

20 / 50

Gaseous diffusivity at atmospheric pressure is of the order of _______ cm2/second?

21 / 50

For which of the following unit operations, Lewis number is of significance ?

22 / 50

For a binary mixture distillation process, the degree of freedom is 2. However, if the pressure is fixed in this process, the number of independent variables in this process will be _____?

23 / 50

For a binary mixture with low relative volatility, continuous rectification to get pure products will require_______?

24 / 50

HETP is numerically equal to HTU, only when the operating line ________?

25 / 50

Henry?s law states that the __________?

26 / 50

For the gas absorption, the height of a transfer unit, based on the gas phase is given by (G: superficial molar gas velocity, L: superficial molar liquid velocity, FG: mass transfer co-efficient, moles/m2, a: interfacial area per unit volume of tower) ?

27 / 50

For absorbing a sparingly soluble gas in a liquid _____?

28 / 50

Freundlich equation applies to the adsorption of solute from_____?

29 / 50

H2S present in naphtha reformed gas is removed by absorbing with_____?

30 / 50

For turbulent mass transfer in pipes, the Sherwood number depends on the Reynolds number as_____?

31 / 50

Gaseous diffusion co-efficient increases with increase in the_______?

32 / 50

For ethanol-water system, the lowering of distillate quality from 95% to 92% will cause _______ plate requirement?

33 / 50

Flooding in a distillation column is detected by a sharp _____?

34 / 50

For ________ drying, the effects of velocity, temperature and humidity of the gas and the thickness of the solid are the same?

35 / 50

Flooding in a vapor-liquid contacting equipment occurs in a tray, when the pressure drop through a tray is ________ the liquid head available in the downcomer?

36 / 50

Heat load in a cooling tower________?

37 / 50

For a binary mixture with low relative volatility_________?

38 / 50

For the same feed, feed quality and separation (in a distillation column), with the increase of total pressure, the number of ideal plates will_______?

39 / 50

For a binary mixture with low relative volatility_____?

40 / 50

For the air water system under ambient conditions, the adiabatic saturation temperature and the wet bulb temperature are nearly equal, because___________?

41 / 50

For gas absorption, low viscosity solvents are preferred, because of their ______?

42 / 50

For continuous drying of granular or crystalline material, the dryer used is the ________ dryer?

43 / 50

Flights in a rotary dryer are provided to_________?

44 / 50

For ethanol-water system, the lowering of distillate quality from 95% to 92% will cause ______ plate requirement?

45 / 50

For a single component absorber, the operating line is straight only when plotted in term of _______ units?

46 / 50

For the flow of gases through a capillary, with increase in temperature, the permeability ___________ as per Knudsen law?

47 / 50

For the same process conditions, the reflux ratio of an unlagged distillation column_____?

48 / 50

For an absorber, both equilibrium and operating line will be straight for _________?

49 / 50

For contacting a highly soluble gas with a liquid ______?

50 / 50

For achieving rapid drying rate in a spray dryer, the diameter of the particles in the feed should be in the range of ________ microns (1 mm = 1000 microns)?

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