Beginning of falling
Beginning of constant
End of falling
None of these
✅ The correct answer is option A.
Chemical Engineering MCQs
Unsaturated air (with dry bulb temperature and dew point being 35°C and 18°C respectively) is passed through a water spray chamber maintained at 15°C. The air will be cooled
And humidified
And dehumidified with increase in wet bulb temperature
At the same relative humidity
And dehumidified with decrease in wet bulb temperature
✅ The correct answer is option D.
On moving the feed line (q-line) from saturated liquid feed (vertical position) to saturated vapor feed (horizontal feed), if the slope of both the operating lines are to be increased, then it will result in
Greater degree of separation with a fixed number of trays
Increased reboiler load
Increased reflux ratio
None of these
✅ The correct answer is option C.
Surface renewal model of mass transfer was enunciated by
Toor and Marchello
Fick
Danckwerts
Stefan
✅ The correct answer is option C.
Gaseous diffusion co-efficient increases with increase in the
Pressure
Temperature
Both A & B
Neither A nor B
✅ The correct answer is option B.
As the reflux ratio increases, the slope of the operating line for rectifying section
Increases
Decreases
Remains constant
Data insufficient, cannot be predicted
✅ The correct answer is option A.
Berl saddle made of carbon cannot be used for
Alkalis
SO₂
H₂SO₄
Oxidising atmosphere
✅ The correct answer is option D.
A good solvent used for absorption should not have very high
Viscosity
Vapor pressure
Freezing point
All of the above
✅ The correct answer is option D.
Minimum possible diameter of a packed coloumn is decided mainly by the
Flooding
Gas viscosity
Liquid density
Liquid hold up
✅ The correct answer is option A.
The fixed cost of a distillation column at minimum reflux ratio is
Minimum
Infinite
Optimum
None of these
✅ The correct answer is option B.