Increases
Decreases
Remains same
Either A or B; depends on the gas
✅ The correct answer is option A.
Chemical Engineering MCQs
When both the fluids flow concurrently in an absorber, the slope of the operating line is
#REF!
#REF!
1
-1
✅ The correct answer is option A.
Large scale drying of wheat is done in a __________ dryer.
Fluidised bed
Spouted bed
Tray
Vacuum rotary
✅ The correct answer is option B.
Stefan’s law describes the mass transfer by
Diffusion
Bulk flow
Both A & B
Neither A nor B
✅ The correct answer is option C.
For a single component absorber, the operating line is straight only when plotted in term of __________ units.
Partial pressure
Mole ratio
Mole fraction
None of these
✅ The correct answer is option B.
For which of the following unit operations, Lewis number is of significance?
Adsorption
Binary distillation
Gas absorption
Humidification
✅ The correct answer is option D.
High pressure at the bottom of a distillation tower handling heat sensitive materials results in
Thermal decomposition of bottoms
Increased relative volatility
Erosion of the tower
Very efficient operation
✅ The correct answer is option A.
The vapour pressure exerted by the moisture contained in a wet solid depends upon the
Nature of the moisture
Temperature
Nature of the solid
All of the above
✅ The correct answer is option D.
Which of the following quantities need not be fixed before starting the design of a co-current absorber?
Heat gain or loss
Flow rate of entering liquid
Flow rate of gas
None of these
✅ The correct answer is option B.
Which of the following mixtures does not form an azeotrope at atmosheric pressure?
Water-alcohol
Methyl alcohol-acetone
Butyl acetate-water
None of these
✅ The correct answer is option D.