1
1 to 5
5 to 10
> 10
✅ The correct answer is option A.
Chemical Engineering MCQs
L/mG is the expression for
Absorption factor
Brinkman number
Slope of operating line in absorber
Slope of operating line in stripper
✅ The correct answer is option A.
The binary diffusivity in gases does not depend upon the
Pressure
Temperature
Nature of the components
None of these
✅ The correct answer is option D.
Penetration theory states that the mass transfer co-coefficient is equal to (where, De is diffusivity and ‘t’ is time)
(De.t)1/2
(De/t)1/2
(4De/πt)1/2
(4De/t)
✅ The correct answer is option C.
What is the degree of freedom of an absorption process in which only one component is transferred between phases?
3
2
4
1
✅ The correct answer is option A.
In a packed absorption tower, if the equilibrium and operating lines are both straight lines, then the ratio, HETP/HTUOG __________ the absorption factor.
Increases with increase in
Is one at unity value of
Both A and B
Neither A nor B
✅ The correct answer is option C.
For the same process conditions, the reflux ratio of an unlagged distillation column
Decreases in winter
Increases in winter
Increases in summer
None of these
✅ The correct answer is option B.
In case of steam distillation, the steam leaving the liquid is not completely saturated with distillate vapour, because
Temperature is less
Total pressure is less
Mixing of steam with the material being vaporised is not so intimate as to result in equilibrium condition
Saturated steam is used for steam distillation
✅ The correct answer is option C.
For __________ drying, the effects of velocity, temperature and humidity of the gas and the thickness of the solid are the same.
Unsaturated surface
Constant rate
Both A & B
Neither A nor B
✅ The correct answer is option C.