A. Diffusion
B. Heat transfer
C. Both A. and B.
D. Neither A. nor B.
Related Mcqs:
- Which of the following is not a batch drier ?
A. Truck drier
B. Agitated pan drier
C. Fluidised bed drier
D. Vacuum shelf drier - Free flowing granular materials can be best dried in a __________________ drier?
A. Rotary
B. Cylinder
C. Drum
D. Freeze - Which of the following is not a continuous drier ?
A. Drum drier
B. Spray drier
C. Tunnel drier
D. Tray drier - In the layout plan for a vacuum distillation unit, operating at 60 mm Hg, supported by a barometric condenser, the appropriate place for the location of vacuum drum for collecting the distillate will be___________________?
A. At ground level
B. 2 metres above the ground
C. 5 metres above ground
D. 10 metres above ground - In the layout plan for a vacuum distillation unit, operating at 60 mm Hg, supported by a barometric condenser, the appropriate place for the location of vacuum drum for collecting the distillate will be_____________________?
A. At ground level
B. 2 metres above the ground
C. 5 metres above ground
D. 10 metres above ground - The individual mass transfer co-efficients (moles/m2s) 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 ?
A. Liquid side
B. Gas side
C. Interfacial
D. Both liquid and gas side - The individual mass transfer co-efficients (moles/m2s) 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 ?
A. Liquid side
B. Gas side
C. Interfacial
D. Both liquid and gas side - In gas-liquid contact operation, the number of ideal stages, N = (xa – xb)/(xb – x*b). This is true when the stripping factor ‘S’ is ________________?
A. S > 1
B. S < 1
C. S = 1
D. S = ∞ - Polar organic compounds are normally used as separating agents for the azeotropic and extractive distillation. Which of the following is the most important factor to be considered for the choice of the separating agent for extractive distillation ?
A. Cost
B. Availability
C. Toxicity
D. Selectivity - Most important factor to be considered in the selection of packings for absorbers is the ______________ of packing?
A. Size
B. Durability
C. Porosity
D. Cost
