If the overall efficiency and Murphree plate efficiency are equal, then both the equilibrium and operating lines are_______________?

Related Mcqs:

1. The ratio of Murphree plate efficiency to point efficiency is 1 in a ______________________ flow model?

   A. Plug
   B. Perfectly mixed
   C. Both A. & B.
   D. Neither A. nor B.

2. The ratio of Murphree plate efficiency to point efficiency is always > 1 in a _______________ flow model?

   A. Plug
   B. Perfectly mixed
   C. Both A. & B.
   D. Neither A. nor B.

3. In a packed tower, the value of HETP equals HTUOG, when the equilibrium and the operating lines are (where, HETP = height equivalent to a theoretical plate HTUOG = overall gas phase height of a transfer unit) ?

   A. Straight
   B. Parallel
   C. Both A. & B.
   D. Neither A. nor B.

4. If the path of liquid across the plate is very long as in case of large diameter tower, Murphree efficiency can be _______________ percent?

   A. 100
   B. > 100
   C. < 100
   D. None of these

5. 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.

6. The efficiency of a plate column will be maximum, when the flow is ideal __________________ the plate?

   A. Across
   B. Above
   C. Both A. & B.
   D. Neither A. nor B.

7. 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 ?

   A. Total
   B. Minimum
   C. Operating
   D. Maximum permissible

8. H2S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H2S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in meters) corresponding to an operating line given by, y = 5x + 0.001 is ______________________?

   A. 2.0
   B. 1.56
   C. 1.0
   D. 0.56

9. In case of absorption, both the operating and equilibrium lines will be straight for______________?

   A. Isothermal operation
   B. Dilute solutions
   C. Dilute solutions and isothermal operation
   D. None of these

10. Equilibrium moisture of a solid is equal to the total moisture minus free moisture. Which of the following substances will have maxi-mum equilibrium moisture ?

    A. Anthracite coal
    B. Rag paper
    C. Bamboo
    D. Inorganic solids