A. -q
B. -q/(1-q)
C. -q/(q-1)
D. None of these
Related Mcqs:
- What is the value of ‘q’ for saturated vapor feed to a distillation column? (where q = fraction of the feed stream that is liquid ?
A. 0
B. 1
C. 1 - 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 - The absorption factor is defined as (where, S1 = slope of the equilibrium curve, S2 = slope of the operating line) ?
A. S1/S2
B. S1.S2
C. S2/S1
D. 1/S1.S2 - 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 - What is the slope of the operating line in the stripping section of a distillation column ?
A. 0
B. ∞
C. > 1
D. < 1 - What is the slope of the operating line in the rectifying section of a distillation column ?
A. 0
B. ∞
C. > 1
D. <1 - Overall distillation column efficiency for most of the refinery columns can be given by (for μ = 0.07 – 1.4 cp and relative volatility < 4) (where ε = overall column efficiency, % μ = molal average viscosity of feed at average column temperature and pressure, cp Δp = pressure drop per tray, psi) ?
A. η = 17 – 61.1 log μ
B. η = 24.6 (Δp/μ)
C. η = 1.66 – 0.25 log μ
D. η = 0.25 log μ – 1.67 - In actual operation of distillation column, the vapour is not distributed uniformly among the bubble caps, primarily because of the_______________?
A. Liquid gradient on the tray
B. Lower skirt clearance
C. Lower static submergence
D. Small downcomer liquid seal - In actual operation of a bubble cap distillation tower, the ______________ at the bottom of the tower is more than that at the top of the tower?
A. Molal flow rate of vapour
B. Vapour molecular weight
C. Pressure and temperature
D. All A., B. and C. - Larger depth of liquid on the trays of a distillation column_________________?
A. Leads to high tray efficiency
B. Results in higher pressure drop per tray
C. Both A. & B.
D. Neither A. or B.
