Heat and mass
Mass and momentum
Heat and momentum
Heat, momentum and mass
✅ The correct answer is option A.
Chemical Engineering MCQs
The ratio of Murphree plate efficiency to point efficiency is always > 1 in a __________ flow model.
Plug
Perfectly mixed
Both A & B
Neither A nor B
✅ The correct answer is option A.
The diffusion co-efficient in m² /s. of acetic acid in benzene (liquid in liquid) is
2.09 x 10-4
2.09 x 10-5
2.09 x 10-9
2.09 x 10-12
✅ The correct answer is option A.
For absorbers, high pressure drop results in
Increased efficiency
Decreased efficiency
High operating cost
Better gas liquid contact
✅ The correct answer is option C.
In case of a desorber (stripper), the
Operating line always lies above the equilibrium curve
Operating line always lies below the equilibrium curve
Temperature remains unaffected
Temperature always increases
✅ The correct answer is option B.
If f = moles of vapour present per mole of feed, then the slope of feed line is (Mcabe-Thiele method)
(1 – f)/f
#REF!
#REF!
#REF!
✅ The correct answer is option C.
Removal of __________ exemplifies an adsorption unit operation.
Uranium from its ore
Water from petrol
Ammonia from coke oven gas
Mustard oil from mustard seed
✅ The correct answer is option B.
The overall mass transfer co-efficient for the absorption of SO₂ in air with dilute NaOH solution can be increased substantially by
Increasing the gas film co-efficient
Increasing the liquid film co-efficient
Increasing the total pressure
Decreasing the total pressure
✅ The correct answer is option A.
Advantage of continuous drying over batch drying is that the
Drying cost per unit weight of dried product is less
Product with more uniform moisture content is produced
Equipment size required is smaller
All of the above
✅ The correct answer is option D.
The most economical range of absorption factor is
0 to 0.5
0 to 3
1.25 to 2
5 to 15
✅ The correct answer is option C.