A. 2.5
B. 5
C. 12.5
D. 17.5
Related Mcqs:
- In a distillation column, the minimum residence time for liquid in the downspout is about ______________ seconds?
A. 1
B. 8
C. 80
D. 180 - 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 a continuous distillation column, the optimum reflux ratio ranges from _______________ times the minimum reflux ratio?
A. 1.1 to 1.5
B. 1.6 to 2
C. 2.2 to 2.6
D. 2.7 to 3 - A minimum clearance of about _______________ mm is maintained between the distillation column wall and the bubble cap?
A. 19
B. 38
C. 67
D. 95 - _____________________ tray arrangement is recommended for distillation column having diameter upto 4 ft ?
A. Radial flow
B. Cross flow
C. Split flow
D. Cascade - In a distillation column, minimum clearance to be maintained between the overflow weir and the last row of the bubble caps is ______________ cms?
A. 2.5
B. 7.5
C. 15
D. 20 - The minimum tray spacing in distillation column of diameter less than 3 ft is normally _____________ inches?
A. 6
B. 18
C. 24
D. 34 - Minimum tube pitch recommended for shell and tube heat exchangers is about _______________ times the outside diameter of the tube?
A. 1.25
B. 1.75
C. 2.5
D. 3.5 - “A claming section” before the liquid flows into the downcomer is provided to__________________?
A. Permit release of entrained vapour in the liquid
B. Reduce the discharge fluctuation
C. Ensure better vapour-liquid contact
D. Cool the liquid before it flows down - In case of bubble cap distillation column of diameter greater than 1.2 metres, the cap diameter is roughly about _______________ cms?
A. 10
B. 20
C. 30
D. 35
