Mass Transfer MCQ Online Test Chemical Engineering - Set 33 - ObjectiveBooks

Mass Transfer MCQ Online Test Chemical Engineering - Set 33

Practice Test: Question Set - 33

1. Smoke is an example of
    (A) Solid dispersed in liquid
    (B) Solid dispersed in gas
    (C) Liquid dispersed in gas
    (D) Gas dispersed in liquid

2. Low viscosity absorbent is preferred for reasons of
    (A) Rapid absorption rates and good heat transfer characteristics
    (B) Improved flooding characteristics
    (C) Low pressure drop on pumping
    (D) All (a), (b) and (c)

3. Pick out the wrong statement.
    (A) Cellulose acetate membranes are used in dialysis process
    (B) Elutriation process refers to when the soluble material is largely concentrated on the surface of an insoluble solid and is simply washed off by the solvent
    (C) 'Cascade' means a group of stages interconnected so that various streams flow from one to another
    (D) Zirconia probe is used for the humidity measurement

4. The wetted wall tower is used to determine
    (A) Individual mass transfer co-efficient (M.T.C.) in gaseous system
    (B) M.T.C. of individual components in a liquid-liquid system
    (C) M.T.C. of liquid in liquid-gas system
    (D) The overall M.T.C. of the system

5. Rotary dryers cannot handle __________ materials.
    (A) Free flowing
    (B) Dry
    (C) Sticky
    (D) Granular

6. In a solution containing 0.30 Kg mole of solute and 600 kg of solvent, the molality is
    (A) 0.50
    (B) 0.60
    (C) 1
    (D) 2

7. Small dia distillation column can be a
    (A) Packed column
    (B) Sieve tray
    (C) Bubble cap
    (D) Any of these

8. Prandtl number for water at 20°C is about
    (A) 7
    (B) 70
    (C) 0.7
    (D) 150

9. Relative volatility does not change appreciably with the change in
    (A) Temperature
    (B) Vapor pressure of either component
    (C) Total pressure
    (D) None of these

10. The difference of wet bulb temperature and adiabatic saturation temperature of unsaturated mixture of any system is
    (A) +ve
    (B) -ve
    (C) Zero
    (D) None of these

11. A minimum boiling azeotrope is exemplified by
    (A) Toluene-benzene
    (B) Acetone-carbon disulphide
    (C) Water-isobutyl alcohol
    (D) None of these

12. Moisture in a substance exerting an equilibrium vapor pressure less than that of pure liquid at the same temperature is called the __________ moisture.
    (A) Bound
    (B) Unbound
    (C) Critical
    (D) None of these

13. Which is the controlling factor for a drum drier?
    (A) Diffusion
    (B) Heat transfer
    (C) Both (a) and (b)
    (D) Neither (a) nor (b)

14. 1 kg of a saturated aqueous solution of a highly soluble component A at 60°C is cooled to 25°C. The solubility limits of A are (0.6 kgA/kg water) at 60°C and (0.2 kgA/kg water) at 25°C. The amount in kg of the crystals formed is:
    (A) 0.4
    (B) 0.25
    (C) 0.2
    (D) 0.175

15. Which of the following is not a continuous drier?
    (A) Drum drier
    (B) Spray drier
    (C) Tunnel drier
    (D) Tray drier

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