Packed column (with stacked packing)
Packed column (with dumped packing)
Bubble plate column
Pulse column
✅ The correct answer is option A.
Chemical Engineering MCQs
Stacked packing compared to dumped packing
Provides poorer contact between the fluids
Gives lower pressure drop
Both A & B
Gives higher pressure drop
✅ The correct answer is option C.
Molecular diffusion is caused by the
Transfer of molecules from low concentration to high concentration region
Thermal energy of the molecules
Activation energy of the molecules
Potential energy of the molecules
✅ The correct answer is option B.
Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (yin = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (yin/yout).For 98% recovery of acetone, the number of trays required is/are
1
8
9
10
✅ The correct answer is option C.
For a binary mixture with low relative volatility, continuous rectification to get pure products will require
Low reflux ratio
Less number of trays
Small cross-section column
High reflux ratio
✅ The correct answer is option D.
The wetted wall tower is used to determine
Individual mass transfer co-efficient (M.T.C.) in gaseous system
M.T.of individual components in a liquid-liquid system
M.T.of liquid in liquid-gas system
The overall M.T.of the system
✅ The correct answer is option A.
Smoke is an example of
Solid dispersed in liquid
Solid dispersed in gas
Liquid dispersed in gas
Gas dispersed in liquid
✅ The correct answer is option B.
The rate of mass transfer is not dependent upon the
Degree of dispersion of one fluid in the other
Interfacial surface exposed between the phases
Both A & B
None of these
✅ The correct answer is option D.
H₂S present in naphtha reformed gas is removed by absorbing with
Ethanolamine
K₂CO₃
HCl
Vacuum gas oil
✅ The correct answer is option A.
What is the reflux ratio at total reflux?
Zero
Infinity
Unity
Data insufficient
✅ The correct answer is option B.