The most economical range of absorption factor is____________________?

Related Mcqs:

1. Absorption factor, for a fixed degree of absorption from a fixed amount of gas should be_________________?

   A. 1
   B. > 1
   C. < 1
   D. ≤ 1

2. 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.

3. The value of „L/mG’ ratio for economical absorption operation ranges from _____________________?

   A. 0.5 to 0.8
   B. 0.8 to 1.2
   C. 1.25 to 2.0
   D. 2.5 to 3.5

4. In a gas-liquid absorption column, for obtaining the maximum absorption efficiency___________________?

   A. Liquid stream should be distributed uniformly
   B. Gas stream should be distributed uniformly
   C. Both gas as well as liquid streams should be distributed uniformly
   D. By passing should be completely avoided

5. In a gas-liquid absorption column, for obtaining the maximum absorption efficiency____________________?

   A. Liquid stream should be distributed uniformly
   B. Gas stream should be distributed uniformly
   C. Both gas as well as liquid streams should be distributed uniformly
   D. By passing should be completely avoided
   Answer: Option C

6. Absorption (liquid-gas system) with evolution of heat as compared to isothermal absorption results in_________________?

   A. Decreased solute solubility
   B. Large minimum liquid to gas (L/G) ratio
   C. Large number of trays
   D. All A., B. and C.

7. Absorption accompanied with chemical reaction is exemplified by the absorption of___________________?

   A. Ammonia in water
   B. Benzol present in coke oven gas by wash oil
   C. SO2 in alkaline solution
   D. All A., B. and C.

8. In the absorption of ammonia in water, the main resistance to absorption is by the _________________ phase?

   A. Liquid
   B. Gas
   C. Both A. & B.
   D. Neither A. nor B.

9. To increase the absorption factor, (where, G = gas flow rate, S = solvent flow rate) ____________________?

   A. Increase both ‘G’ and ‘S’
   B. Decrease both ‘G’ and ‘S’
   C. Increase ‘S’ and decrease ‘G’
   D. Increase ‘G’ and decrease ‘S’

10. Absorption factor method is used to calculate the number of ideal stages, when_______________________?

    A. Operating line lies above the equilibrium line
    B. Operating line lies below the equilibrium line
    C. Both operating and equilibrium lines are parallel
    D. Pressure drop in the column is very high