Which of the following denotes gas phase mass transfer coefficient?

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Statement 1: Penetration theory states that mass transfer coefficient is directly proportional to diffusivity coefficient which was later proved wrong. Statement 2: Penetration theory states that mass transfer is based on unsteady mass transfer.

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Statement 1: In film theory, mass transfer coefficient is proportional to D^1/2 Statement 2: Penetration theory states that all elements are exposed at the same time which is unrealistic.

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Ratio of equilibrium concentrations of solute A in liquid phase and gas phase i.e. CAL* and CAg* respectively is α. α is called _____

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Statement 1: Diffusion of gas component through the resistive film to the bulk of the liquid is the rate determining step. Statement 2: Diffusion of gas component through the gas-liquid inter-phase is the rate determining step.

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In plate evaporator, the heat transfer coefficient is high in spite of low residence time because _____

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Shifting of a pair of ripened apples from the store house to the vegetable cart is called mass transfer.

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Velocity gradient is the main driving force in mass transfer.

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Which of the following is an advantage of using pumps as heat transfer equipment?

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A phase boundary between alcohol and water exists.

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Statement 1: When alcohol is allowed to move from chamber A to chamber B when a barrier between them is removed, it is called multi phase diffusion. Statement 2: When oxygen is made to diffuse into the water, it’s called continuous molecular diffusion.

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Statement 1: Resistance is inversely proportional to the inter-facial area. Statement 2: The inter-facial area of a body is the area of the dispersed phase in a unit volume of the vessel.

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Statement 1: Scraping improves heat transfer co-efficient by 5 times in case of non-Newtonian fluids. Statement 2: In food industry, major physical changes to food items when they’re processed, take place like transformation from Newtonian to Non-Newtonian fluids. Hence, scraped surface heat exchangers are very beneficial.

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In a jacketed vessel, the only way to increase the heat transfer rates is to increase the temperature difference.

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Statement 1: Concentration is a product of diffusivity and solubility. Statement 2: Permeability coefficient in case of food packaging can be written as product of partial pressure and solubility using Henry’s law.

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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?

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At a food processing industry, the steam was re-compressed and a small amount of steam at high pressures and temperatures was sent into the next evaporation chamber in a multiple effect evaporator. Which of the following is true with respect to the above sentences?

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Which of the following dryers requires non-sticky granular feed?

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