strain
stress
modular ratio
none of these
✅ The correct answer is option B.
Chemical Engineering MCQs
__________ tray arrangement is recommended for distillation column having diameter upto 4 ft.
Radial flow
Cross flow
Split flow
Cascade
✅ The correct answer is option B.
The practical representative values of HETP for a number of commercial operations lies within a range of __________ metre.
0.1-0.2
0.2-0.5
0.4-0.9
1.2-1.5
✅ The correct answer is option C.
In a cylinderical vessel subjected to internal pressure, the longitudinal stress σL and the circumferential stress, σn are related by
σh = 2 σL
σh = σL
σh = σL/2
no relation exists
✅ The correct answer is option A.
What is the slope of the operating line in the stripping section of a distillation column ?
0
∞
> 1
< 1
✅ The correct answer is option C.
Liquid/petroleum fuel storage tanks are built underground (as in case of petrol pumps), when the storage capacity is less than __________ kilolitres.
20
30
45
85
✅ The correct answer is option C.
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 η = overall column efficiency, % μ = molal average viscosity of feed at average column temperature and pressure, cp Δp = pressure drop per tray, psi)
η = 17 – 61.1 log μ
η = 1.66 – 0.25 log μ
η = 0.25 log μ – 1.67
✅ The correct answer is option A.
Generally, as the length of the liquid path on a tray is increased beyond 5 ft, the overall column efficiency
increases
decreases
remains same
may increase or decrease depending upon the plate spacing
✅ The correct answer is option A.
Typical static submergence for bubble cap plate column operating at atmospheric pressure may be around
2.5″
0.5″
5″
50% of the plate spacing
✅ The correct answer is option B.
An adequate clearance between the tray and the shell wall of a distillation column is provided to
drain the liquid from the tray when the unit is not in operation.
allow for thermal expansion and facilitate installation.
avoid back-trapping.
none of these.
✅ The correct answer is option B.