The absorption factor is defined as (where, S1 = slope of the equilibrium curve, S2 = slope of the operating line) ?

Related Mcqs:

1. Ponchon Savarit method is based on the use of enthalpy concentration diagram, which contains the bubble point curve (saturated liquid curve), dew point curve (saturated vapour curve) and equilibrium tie lines. As compared to McCabe-Thiele’s method, this method_________________?

   A. is more accurate in finding the number of equilibrium stages
   B. accounts for the enthalpy changes in the process
   C. Facilitates direct calculation of heat load on reboiler & condenser from, the diagram used in
   this method
   D. All A, B. & C.

2. The operating velocity in the absorption tower is usually 40-50% of the flooding velocity. Packed absorption towers are normally designed for a pressure drop of about _________________ mm of water column per metre height of packing?

   A. 1-5
   B. 20-40
   C. 100-150
   D. 1000-1500

3. The slope of operating line in the rectifying section of a distillation column is unity, if the reflux ratio is___________________?

   A. 0
   B. ∞
   C. 1
   D. Minimum

4. What is the slope of the operating line in the stripping section of a distillation column ?

   A. 0
   B. ∞
   C. > 1
   D. < 1

5. What is the slope of the operating line in the rectifying section of a distillation column ?

   A. 0
   B. ∞
   C. > 1
   D. <1

6. Factor of safety (i.e., overdesign factor) in heat transfer equipments is about _____________ percent more than the actual/theoretical design factor?

   A. 5-10
   B. 15-20
   C. 30-35
   D. 35-40

7. Pressure drop (Δp) and the superficial gas mass velocity (G) in case of packed absorption tower operating in the preloading range are related as_________________?

   A. Δp = G
   B. Δp = G0.5
   C. Δp = G2
   D. Δp = 1/G0.6

8. What is the slope of the feed line, if the feed to a distillation column is a saturated liquid ?

   A. 0
   B. ∞
   C. > 1
   D. < 1

9. The slope of the feed line in distillation operation is given by (where, q = fraction of the feed stream that is liquid ?

   A. -q
   B. -q/(1-q)
   C. -q/(q-1)
   D. None of these

10. The LMTD correction factor (FT) is defined as the __________________?

    A. Ratio of true temperature difference to the LMTD
    B. Ratio of LMTD to the true temperature difference
    C. Differenced of true temperature difference and the LMTD
    D. Geometric mean of the true temperature difference and the LMTD