Agitated vessels
Bubble cap tray towers
Perforated sieve tray towers
Spray towers
✅ The correct answer is option D.
Mass Transfer MCQs
Which of the following binary systems is an example of a maximum boiling azeotrope?
Water-hydrochloric acid
Acetone-carbon disulphide
Water-ethyl alcohol
N-heptane-n-octane
✅ The correct answer is option A.
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.
Coffee is prepared from coffee beans by leaching with
Cold water
Hot water
Dilute hot caustic solution
Naphtha
✅ The correct answer is option B.
Which of the following equipments is not used in liquid-liquid extraction?
Pachuka tank
Agitated vessels
Centrifugal extractors
Packed towers
✅ The correct answer is option A.
Co-current absorbers are usually used when the gas to be dissolved in the liquid is
Sparingly soluble
Highly soluble
A pure substance
A mixture
✅ The correct answer is option C.