IFS Chemical Engineering 2002
Paper-I

Section A
1. Answer any four of the following: (10 × 4 40)
a. What is the physical significance of Bernoulli's equation? How can this equation be modified to account for friction losses?
b. What are the laws of size reduction? Explain them, mentioning the ranges of their. Applicability.
c. Discuss the procedure for evaluating mass transfer coefficient using Wetted Wall Column.
d. Discuss briefly the diffusion and capillary mechanisms involved in moisture movement in drying of solids.
e. By using the analogy suggested by Osborne Reynolds, develop a relation between heat transfer coefficient and friction factor.
2. Answer the following questions
a. Considering fluid flow through a circular pipe, derive the Hagen-Poiseuille equation.
b. Explain the principle of Pitot tube.
c. List three industrial filters, specially indicating their applications.
d. Discuss the degree of mixing and determination of power of mixing (10 × 4 40).
3. Answer the following questions
a. Explain Point efficiency. Murphree tray efficiency and overall tray efficiency.
b. Explain how to calculate minimum liquid gas ratio for absorber.
c. Explain how you would determine number of stages for double solvent extraction.
d. Discuss Mier's super saturation theory (10 × 4 40).
4. Answer the following questions
a. What are the effects of various operating conditions on overall heat transfer coefficient in an evaporator unit?
b. What do you understand by geometric shape factor in thermal radiation 7 Determine the geometric shape factor for a very small disc of area dA and large parallel dic of area A located above the smaller one.
c. Differentiate between equivalent diameters for heat transfer and pressure drop for flow of a fluid through the annulus of a double pipe heat exchanger.
d. With a neat sketch, describe briefly the scheme used for solar water heating (10 × 4 40).

Section B
5. Answer any four of the following: (10 × 4 40)
a. Discuss absorption and extraction type separation.
b. Write the design procedure for flat heads.
c. Explain cathodic protection to prevent corrosion.
d. How do you find the frequency response of a PI controller? Explain.
e. With a neat sketch, describe a suitable device for controlling the process outlet temperature of a heat exchanger that uses steam as the heating medium.
6. Answer the following questions
a. Explain the theory of electrical separations.
b. Discuss the electro-dialysis and its applications.
c. Explain the parallel leaf-type ultra filtration module.
d. Discuss on very low pressure distillation conducted industrially for heat-sensitive substances (10 × 4 40).
7. Answer the following questions
a. Discuss the criteria for shell failure based on theory of elasticity.
b. Distinguish between External bolting chair and Centered anchor-bolt chair.
c. Name the various types of heads used for closing ends of cylindrical shells, indicating their applications.
d. Write the stepwise procedure for determining the standard plate thickness for fabricating a cylindrical shell operating at internal pressure (10 × 4 40).
8. Answer the following questions
a. Explain how strain gauge is used in pressure measurement.
b. Discuss the working of an optical pyrometer.
c. Derive the transfer function of an RC circuit. Show that the time constant of an RC circuit is the product of R and C.
d. Explain the graphical rules for Bode plots (10 × 4 40).