Leaching
Adsorption
Steam distillation
Multicomponent absorption
✅ The correct answer is option B.
Chemical Engineering MCQs
Equilibrium-moisture curves of different solids
Are different
Are same
Depend on the humidity of the gas
None of these
✅ The correct answer is option A.
It takes 6 hours to dry a wet solid from 50% moisture content to the critical moisture content of 15%. How much longer it will take to dry the solid to 10% moisture content, under the same drying conditions? (The equilibrium moisture content of the solid is 5%).
15 min
51 min
71 min
94 min
✅ The correct answer is option C.
Drying of refractory is normally carried out in a __________ dryer.
Open pan
Tray
Rotary vacuum
Truck/tunnel
✅ The correct answer is option D.
Though, theoretically the adsorption & desorption isotherms is expected to coincide but sometimes at least a part of the isotherms does not coincide and this phenomenon is known as adsorption hysterisis. In such cases, the desorption equilibrium pressure is __________ that obtained for adsorption.
Lower than
Higher than
Same as
Either same or higher than
✅ The correct answer is option A.
In case of unsaturated air
Dew point < wet bulb temperature
Wet bulb temperature < dry bulb temperature
Both A & B
Neither A nor B
✅ The correct answer is option C.
For a fixed number of ideal stages in a distillation column, as the reflux ratio is increased, the difference in composition between the top and bottom product streams
Increases
Decreases
Remains unaffected
Passes through a maximum
✅ The correct answer is option A.
The-relative volatility for separation of a non-ideal binary mixture by distillation should be
0
1
> 1
< 1
✅ The correct answer is option C.
In paper industry, paper is dried in a __________ dryer.
Tunnel
Heated cylinder
Conveyor
Festoon
✅ The correct answer is option B.
Make up water is supplied during cooling tower operation to compensate for water losses due to
Evaporation
Blowdown
Entrainment
All of the above
✅ The correct answer is option D.