What is Mass Transfer Process Multiple Choice Questions - Set 41 - ObjectiveBooks

What is Mass Transfer Process Multiple Choice Questions - Set 41

Practice Test: Question Set - 41

1. Pick out the wrong statement.
    (A) The mole fraction of solute is directly proportional to the molality of a 'dilute' solution
    (B) For a non-reacting binary mixture of ideal gases, the partial pressure distribution of both components is nonlinear in the case of steady state unimolal unidirectional diffusion
    (C) Azeotropes obey Raoult's law at all temperature
    (D) The relative volatility of a binary mixture at the Azeotropic composition is 1

2. During drying operation, it is easier to remove the __________ moisture.
    (A) Equilibrium
    (B) Critical
    (C) Unbound
    (D) Bound

3. Which of the following quantities need not be fixed before starting the design of a co-current absorber?
    (A) Heat gain or loss
    (B) Flow rate of entering liquid
    (C) Flow rate of gas
    (D) None of these

4. Which of the following parameters remains almost constant during adiabatic saturation of unsaturated air?
    (A) Dry bulb temperature
    (B) Dew point
    (C) Wet bulb temperature
    (D) None of these

5. In an absorber, HETP does not vary with the
    (A) Flow rate of liquid
    (B) Flow rate of gas
    (C) Type and size of packing
    (D) None of these

6. Leaching of sugar from sugar beets is done by
    (A) Hot water
    (B) Hexane
    (C) Dilute H2SO4
    (D) Lime water

7. In case of liquid-liquid binary diffusion, diffusivity of one constituent into another is not dependent on the
    (A) Temperature and pressure
    (B) Concentration
    (C) Nature of the constituents
    (D) None of these

8. When the temperature and humidity of air is low, we usually use __________ draft cooling tower.
    (A) Natural
    (B) Forced
    (C) Induced
    (D) None of these

9. Water-ethyl alcohol solution can be concentrated (in respect of alcohol concentration) by __________ distillation.
    (A) Atmospheric
    (B) Vacuum
    (C) High pressure
    (D) None of these

10. In an interphase mass transfer process, the lesser the solubility of a given solute in a liquid, the higher are the chances that the transfer process will be
    (A) Liquid phase resistance-controlled
    (B) Gas phase resistance controlled
    (C) Impossible
    (D) Driven by a non-linear driving force

11. Percentage saturation is __________ the relative saturation.
    (A) Always smaller than
    (B) Always greater than
    (C) Not related to
    (D) None of these

12. If a1 and a2 are the relative volatilities when the pressure in the distillation column is 1 and 2 atm respectively. Pick out the correct statement.
    (A) a1 = a2
    (B) a1 = 2a2
    (C) a1 = 0.5 a2
    (D) None of these

13. In a packed absorption tower, if the equilibrium and operating lines are both straight lines, then the ratio, HETP/HTUOG __________ the absorption factor.
    (A) Increases with increase in
    (B) Is one at unity value of
    (C) Both (a) and (b)
    (D) Neither (a) nor (b)

14. If a two phase system is in physical equilibrium; then it means that, the
    (A) Escaping tendency of each component from the liquid phase to the vapor phase is exactly equal to that from vapor phase to liquid phase
    (B) Temperature of the liquid phase is equal to that of the vapor phase
    (C) Total pressure throughout the liquid phase is equal to that throughout the vapor phase
    (D) All (a), (b) and (c)

15. Which of the following remains constant during evaporative cooling process with recirculated water supply?
    (A) Relative humidity
    (B) Partial pressure of vapor
    (C) Wet bulb temperature
    (D) None of these

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