# SET-III

1. (a) How are bio-chemical reactions different from chemical reactions?

(b) Briefly explain the steps in development of a complete bioprocess for commercial manufacture of a new recombinant DNA derived product.

2. By electrolysing a mixed brine, a mixture with the following percentage composition (by weight) is obtained at the cathode:

Cl2 = 67%; N2 = 28% and O2 = 5%. Using ideal gas law, calculate the following:

(a) Composition of the gas by volume.

(b) Density of the mixture in kg/m3 at 300C and 720 mm Hg.

(c) Specific gravity of the gas mixture (air = 1.0).

3. Briefly explain the following fluid properties

(a) Surface tension

(b) Capillary rise

(c) Specific weight

(d) Compressibility

(e) Bulk modulus.

4. Define Viscosity. With a neat sketch explain the principle and working of plate and cone viscometer.

5. (a) Derive Hagen-Poiseuille equation. Explain the significance of the equation.

(b) Derive relations for Reynolds number and friction factor.

6. (a) A packed bed of catalyst consisting of spherical particles of 150μ m diameter is subjected to fluidization by using oil of density 900 Kg/m3. If the density of the particle be 2500 Kg/m3. Determine the mass flow rate of oil per unit area of bed to initiate fluidization. Porosity of bed =0.48, Dynamic viscosity of oil is 0.003 Pa.s. Assume flow condition to be laminar.

(b) Explain term “Terminal settling velocity” of a particle.

7. (a) Derive flow equation for venturimeter.

(b) Discuss about the importance and application of vinturi meter in bioprocess industries.

8. (a) Write shortnotes on

i. Water hammer, and