Related Questions

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.
In the carbonation of a soft drink, the total quantity of carbon dioxide required is the equivalent of 3 volumes of gas to one volume of water at 0⁰C and atmospheric pressure. Calculate (i) the mass fraction and (ii) the mole fraction of the CO2 in the drink, ignoring all components other than CO2 and water. Basis 1 m3 of water = 1000 kg Volume of carbon dioxide added = 3 m3 From the gas equation, pV = nRT 1 x 3 = n x 0.08206 x 273 n = 0.134 mole. Molecular weight of carbon dioxide = 44 And so weight of carbon dioxide added = 0.134 x 44 = 5.9 kg
Combined carbon content in iron and steel is determined by treating the sample with dilute HNO3. So that combined carbon forms a soluble brown nitrated compound, the intensity of which is matched with that of a standard sample of similar composition treated under similar condition. The intensity of color produced is proportional to the carbon content of iron of steel sample. This method of combined carbon determination is called the
Which of the following statements is/are not true?
1. Chemical weathering is most common in limestone rocks
2. Chemical weathering is most active in wet regions with higher temperature
3. Rain action is a form of chemical weathering
4. Exfoliation is a process of chemical weathering
During washing of filter at the end of constant pressure filtration, the rate of washing equals the rate of filtration
Filtration operation carried out by continuous increase of the inlet pressure of slurry, is called the __________ filtration.
The cake resistance increases steadily with the time of filtration in a plate and frame filter employing constant __________ filtration.
A centrifugal filtration unit operating at a rotational speed of w has inner surface of the liquid (density ρL) located at a radial distance R from the axis of rotation. The thickness of the liquid film is δ and no cake is formed. The initial pressure drop during filtration is
The rate of filtration of pressure filtration is ______ l/m2/hour.
The cake resistance increases steadily with the time of filtration in plate and frame filter employing constant________ filtration.