IFS Chemical Engineering Papers 2007
IFS Chemical Engineering 2007
Paper-I
Section A

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

Prove that the velocity profile in a laminar flow of a Newtonian fluid through a circular pipe is a parabola.

Answer the following questions

Differentiate between differential and cumulative analysis to find the average size of the sample.

Derive the expression for the critical speed of a ball mill. Mention the meanings of symbols and their units clearly.

Define humidification and dehumidification, Explain the working of a water cooling tower with a neat diagram.

Derive the relation between rate of heat transfer and resistances in series in a composite wall.

Answer the following questions

Starting from the first principles, obtain Bernoulli's equation from momentum balance in potential flow and extend the equation for practical applications

Define capacity and effectiveness of a screen. Derive an expression for the overall effectiveness of a screen

Explain different types of fluidisation and their applications

Give a critical account of Rittinger's and Bond's laws

Answer the following questions

Explain the mechanism of drying during the constant rate and failing rate periods. Discuss the effects of humidity and velocity of the gas on drying rate

Mention the various types of crystallisation equipment used in the process industry. Explain the working of any one of the crystallisers with a neat diagram

Write the suitable conditions for liquid-liquid extraction. Discuss the importance of equilibrium distribution coefficient and selectivity in the choice of a solvent

Write the procedure in detail for the design of a distillation column by Mc Cabe-Thiele method

Answer the following questions

Discuss briefly the various regimes in boiling heat transfer

Describe the construction of shell and tube heat exchanger with a neat sketch

Define the capacity and steam economy of an evaporator. Discuss the effect of boiling point elevation on evaporator performance

Air is heated in air heather from 30° C to 110° C and the hot gases are cooled from 210° C to 145° C. Calculate the LMTD in parallel and counter glows. Give critical comments of the values obtained

Section B

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

Discuss various types of membranes.

Write the design procedure of either torispherical head or elliptical head.

Mention the principal stresses induced in a vessel. How they act over the vessel.

Differentiate between pneumatic and electronic controllers.

List the various liquid level measuring instruments. Give their range and applications.

Answer the following questions

Compare and contrast the terms osmosis and reverge osmosis

Discuss the principles of ultrafiltration. Mention its applications

Describe the processes of dialysis and also of electrodialysis. Write their applications

Briefly discuss about Super critical fluid extraction

Answer the following questions

Discuss the selection of material of construction for pressure vessels

Explain the design procedure for vertical type storage vessels.

Mention various types of heads commonly used in cylindrical vessels and list their applications

Define joint efficiency. Mention the factors influencing the choice of supports

Answer the following questions

Explain the working principles involved in various pressure measuring instruments

Answer the following questions

Explain the negative and positive feedback control system

Explain the servo and regulatory control problems

What are the elements of computer based process control? Explain their functions

What are phase and gain margins? Discuss the bode stability criterion