Q. Which among the following is the statement of the ‘Fick’s Law’?

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Q. The gas A diffuses through non-diffusing B from point 1 to point 2. The total pressure is 2atm and yᴀ₁=0.1 and yᴀ₂=0.Then the ratio (dPᴀ/dz)1/(dPᴀ/dz)2 is

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Q. In industries titanium is hardened through diffusion of carbon. The concentration of carbon at 1mm into the surface of the titanium slab is 0.25kg/m³ and at 3mm the concentration is 0.68kg/m³. The rate at which the carbon is entering into its surface is 1.27*10⁻⁹kg/m².s. Calculate the value of diffusion coefficient of carbon.

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Q. The mass transfer by convection can take place under how many conditions?

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Q. Lewis number is given by

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Q. Prandtl number is given by

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Q. Schmidt number is given by

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Q. Sherwood number is given by

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Q. The solution for velocity, concentration and temperature boundary layers will be same if

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Q. Convective mass transfer involves the transportation of material between a boundary surface and a moving fluid or between two immiscible fluids. It is prescribed by the relation

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Q. Which number forms the connecting link between the velocity and temperature profiles?

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Q. Which number forms the connecting link between the velocity and concentration profiles?

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Q. Which number forms the connecting link between the temperature and concentration profiles?

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Q. What is the value of emissivity for polished aluminum?

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Q. Which one is having highest emissivity?

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Q. What is the value of emissivity for polished copper?

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Q. What is the value of emissivity for tarnished copper?

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Q. Which one is having the lowest emissivity?

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Q. What is the value of emissivity for dull stainless steel?

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Q. What is the value of emissivity for white marble?

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