IFS Chemical Engineering Papers 2003
IFS Chemical Engineering 2003
Paper I
Section A

Answer any four of the following: (10 × 4 40)

What is an incompressible fluid? Determine an expression for pressure drop in an incompressible fluid flowing in a pipe under the condition of laminar flow.

Discuss the working of a centrifugal pump along with its operational problems and remedial measures.

Describe the procedure to calculate number of equilibrium stages in the fractionation of a binary system by Ponchon-Savant method.

Explain LMTD correction factor. How is it calculated in the use of multipass shell and tube heat exchangers?

Develop a relation between heat transfer coefficient and friction factor by using colburn analogy.

Answer the following questions

Discuss flow pattern caused by a turbine type impeller in an agitated tank and suggest ways to prevent swirling and vortex formation

Explain the principle of pilot tube and its application. Also discuss how average velocity can be calculated

Discuss the construction and operation of a notary drum filter. How is rate of filtration related to speed of rotation

What is fluid energy mill? Explain its principle

Answer the following questions

Explain the term critical thickness of insulation. Determine an expression for it for a spherical vessel

Saturated steam of atmospheric pressure condenses on a cold tube of 25 mm diameter and 1 m long. Determine per cent change in heat transfer rate if the orientation of tube is changed from horizontal to vertical

Compare forward feed double effect evaporator with backward feed double effect feed evaporator

Briefly discuss the procedure to calculate radiant heat load of an oil fired furnace

Answer the following questions

Define diffusivity term, Discuss the method of measurement of diffusivity of a binary system in a laboratory

Describe the procedure to calculate minimum liquid-gas ratio for absorbers

Discuss the working principle of a forced draft cooling tower

What are constant rate and falling rate periods in the drying of solids? Develop an expression for time of drying of a solid under falling rate period

Section B

Answer any four of the following: (10 × 4 40)

Explain the phenomena of reverse osmosis. Discuss the characteristics of membrane required for this process.

Discuss the failure of vessels based on theory of plasticity.

Name various types of heads commonly used in cylindrical vessels, alongwith their sketches and areas of application.

Determine an expression for frequency response of a transportation lag. Show it graphically also.

Discuss ratio control and its application in process industries. Give two examples.

Answer the following questions

What is ultrafiltration? Discuss the dependence of membrane permeation rate on applied pressure difference, feed solute concentration and cross flow velocity for ultrafiltration

Discuss low pressure distillation along with its application in industries

Explain

membrane fouling

membrane selectivity in separation processes using membrane

Explain the working principle of dialysis

Answer the following questions

Explain Coate's theoretical analysis for bending stress at the head-shell junction of a vessel

Discuss the design procedure of skirt supports for vertical vessels

A process requires a shell to be designed to contain a working pressure of 200 MN/m2. The shell temperature is 400 oC, Inside diameter and length of the shell have been estimated to be 500 mm and 4000 mm, respectively. If carbon steel having an allowable stress of 10.40 × 102 MN/m2 is used as material of construction of the shell, determine suitable thickness of the shell

Answer the following questions

What are various devices which can be used for absolute pressure measurement? Discuss any one of them which can be used with continuous recording system

Discuss two important characteristics of a control valve

Describe the procedure for the design of sampled data controller in a system

How do you find the frequency response of a PID controller? Explain it