Diffusion & Mass Transfer MCQs : This section focuses on the "Diffusion & Mass Transfer". These Multiple Choice Questions (MCQs) should be practiced to improve the Diffusion & Mass Transfer skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
A phase boundary between alcohol and water exists.
A. TRUE
B. FALSE
Question 2
In a packaging of dry grapes, the packaging material is made of polyethylene. The dry grapes have certain moisture content. Which of the following is true with respect to the diffusion of certain amount of moisture through the packing?
A. The moisture will not diffuse
B. The diffusion in this case is called permeability
C. None of the mentioned
D. Neither of the mentioned
Question 3
Ratio of equilibrium concentrations of solute A in liquid phase and gas phase i.e. CAL* and CAg* respectively is α. α is called _____
A. Diffusion coefficient
B. Distribution coefficient
C. Mass transfer coefficient
D. None of the mentioned
Question 4
Rayleigh number is _____
A. Product of schmidst and grashof number
B. Total mass transferred by mass transferred due to molecular diffusion
C. Product of schmidst and reynold number
D. None of the mentioned
Question 5
Sherwood number is _____
A. Product of schmidst and grashof number
B. Total mass transferred by mass transferred due to molecular diffusion
C. Product of schmidst and reynold number
D. None of the mentioned
Question 6
Shifting of a pair of ripened apples from the store house to the vegetable cart is called mass transfer.
A. TRUE
B. FALSE
Question 7
The existence of a thick constant film between two phases is a proposal by which of the following theories?
A. Film theory
B. Penetration theory
C. Surface renewal theory
D. All of the mentioned
Question 8
Velocity gradient is the main driving force in mass transfer.
A. TRUE
B. FALSE
Question 9
Which of the following is also called Oxygen balancing method?
A. Dynamic gassing out method
B. Static method
C. Sulphite oxidation method
D. None of the mentioned
Question 10
Which of the following is not a measuring technique of KLa?
A. Dynamic gassing out method
B. Static method
C. Sulphite oxidation method
D. None of the mentioned
Question 11
Which theory proposes that the film is continuously getting renewed and replaced by the bulk liquid?
A. Film theory
B. Penetration theory
C. Surface renewal theory
D. None of the mentioned