Mass Transfer MCQ Questions & Answers | Chemical Engineering

A. Straight

B. Parallel

C. Both A & B

D. Neither A nor B

A. < 1 and ≈ 1

B. 1 and 0

C. >1 and ≈ 1

D. 0 and ≈ 1

A. Pr = Sc; percentage change in heat and mass transfer flux will be the same for a given change in the degree of turbulence

B. Pr = Sc = 1; total mass, momentum and thermal diffusivity will be the same

C. Both A & B

D. Pr = Sc ; there won

A. In case of liquid-liquid extraction, no separation is possible, if the selectivity of the solvent used is unity

B. With increase in temperature, the selectivity of the solvent used in solvent extraction decreases

C. The selectivity of solvent used in solvent extraction is unity at the plait point

D. All of the above

A. a₁ = a₂

B. a₁ = 2a₂

C. a₁ = 0.5a₂

D. None of these

A. Incurs smaller pressure drop

B. Allows installation of cooling coils

C. Is less costly when built in large sizes/diameters

D. Is more suitable, if suspended solids are present in fluid streams

A. Have low weight per unit volume

B. Have large surface area per unit volume

C. Have large free cross-section

D. Hold up large amount of liquid in the packing

A. Open pan

B. Tray

C. Rotary vacuum

D. Truck/tunnel

A. Molecular velocity only

B. Pore radius of the catalyst only

C. Molecular mean free path only

D. Molecular velocity and por radius of the catalyst

A. Reverse osmosis

B. Thermal diffusion

C. Leaching

D. Solvent extraction