Schmidt number
Sherwood number
Lewis relationship
Froude number
✅ The correct answer is option D.
Chemical Engineering MCQs
A coalescer in a mixer-settler liquid-liquid extraction coloumn
Comprises of thin bed of substances of extended surface having high porosity
Helps in increasing the bubble size entering the settler
Helps in increasing the settling rate of the bubbles
All of the above
✅ The correct answer is option D.
In a gas-liquid absorption coloumn, for obtaining the maximum absorption efficiency
Liquid stream should be distributed uniformly
Gas stream should be distributed uniformly
Both gas as well as liquid streams should be distributed uniformly
By passing should be completely avoided
✅ The correct answer is option C.
In an absorption coloumn, the flooding velocity for random packing is __________ that for stacked/regular packing.
Greater than
Smaller than
Equal to
Either A, or B ; depends on the type of packing
✅ The correct answer is option B.
Calculation of mass transfer co-efficient is mostly/normally done using __________ theory.
Surface renewal
Film
Penetration
None of these
✅ The correct answer is option B.
__________ number indicates the ratio of the rates of the heat and mass transfer incase of a cooling tower.
Sherwood
Stanton
Lewis
Peclet
✅ The correct answer is option C.
If the path of liquid across the plate is very long as in case of large diameter tower, Murphree efficiency can be __________ percent.
100
> 100
< 100
None of these
✅ The correct answer is option B.
Component A is diffusing in a medium B. The flux NA relative to a stationary point is equal to the flux due to molecular difusion, if
Mass transfer is accompanied by reaction
Diffusion of A is in stagnant medium B
Molecular mean free path is high
There is equimolar counter diffusion
✅ The correct answer is option D.
At a given equilibrium pressure, with increase in temperature, the concentration of adsorbed gas on solid adsorbant
Increases
Decreases
Remains unchanged
Increases exponentially
✅ The correct answer is option B.
Moisture in a solid exerting an equilibrium vapour pressure equal to that of the pure liquid at the same temperature is called the __________ moisture.
Unbound
Critical
Free
Bound
✅ The correct answer is option A.