Free flowing
Dry
Sticky
Grannular
✅ The correct answer is option C.
Chemical Engineering MCQs
Which of the following is the most suitable for extraction in a system having very low density difference?
Mixer-settler extractor
Centrifugal extractor
Pulsed extractor
Packed extraction tower
✅ The correct answer is option B.
The individual mass transfer co-efficients (moles/m² . s) for absorption of a solute from a gas mixture into a liquid solvent are, KL = 4.5 and KG = 1.5. The slope of the equilibrium line is 3. Which of the following resistance (s) is (are) controlling ?
Liquid side
Gas side
Interfacial
Both liquid and gas side
✅ The correct answer is option B.
Sides of equilateral-triangular co-ordinates (on which ternary liquid system is plotted) represent
A pure component
A binary mixture
A ternary mixture
Partially miscible ternary system
✅ The correct answer is option B.
The main reason for dividing a tall packed tower into series of small towers is to
Minimise the overall pressure drop
Avoid flooding
Reduce liquid hold up
Avoid channeling
✅ The correct answer is option D.
Which of the following is not a continuous drier?
Drum drier
Spray drier
Tunnel drier
Tray drier
✅ The correct answer is option D.
For continuous drying of grannular or crystalline material, the dryer used is the __________ dryer.
Tunnel
Tray
Rotary
None of these
✅ The correct answer is option C.
If moisture content of solid on dry basis is X, then the same on wet basis is
X/(X + 1)
X/(X – 1)
(X + 1)/X
(X – 1)/X
✅ The correct answer is option A.
Absorption factor method is used to calculate the number of ideal stages, when
Operating line lies above the equilibrium line
Operating line lies below the equilibrium line
Both operating and equilibrium lines are parallel
Pressure drop in the column is very high
✅ The correct answer is option C.
Only small amount of evaporation of water produces large cooling effects because of its
Large latent heat
Low viscosity
Small latent heat
None of these
✅ The correct answer is option A.