SECTION A
1. Answer any four of the following :
(10 × 4 = 40)
(a) Prove that the velocity profile in a laminar flow of a Newtonian fluid through a circular pipe
is a parabola.
(b) (i) Differentiate between differential and cumulative analysis to find the average size of
the sample.
(ii) Derive the expression for the critical speed of a ball mill. Mention the meanings of
symbols and their units clearly.
(c) Define humidification and dehumidification, Explain the working of a water cooling tower
with a neat diagram.
(d) Derive the relation between rate of heat transfer and resistances in series in a composite wall.
2. (a) Starting from the first principles, obtain Bernoulli’s equation from momentum balance in
potential flow and extend the equation for practical applications.
(10)
(b) Define capacity and effectiveness of a screen. Derive an expression for the overall
effectiveness of a screen.
(10)
(c) Explain different types of fluidisation and their applications.
(10)
(d) Give a critical account of Rittinger’s and Bond’s laws.
(10)
3. (a) 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.
(10)
(b) 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.
(10)
(c) Write the suitable conditions for liquid- liquid extraction. Discuss the importance of
equilibrium distribution coefficient and selectivity in the choice of a solvent.
(10)
(d) Write the procedure in detail for the design of a distillation column by Mc Cabe-Thiele
method.
(10)
4. (a) Discuss briefly the various regimes in boiling heat transfer.
(10)
(b) Describe the construction of shell and tube heat exchanger with a neat sketch.
(10)
(c) Define the capacity and steam economy of an evaporator. Discuss the effect of boiling point
elevation on evaporator performance.
(10)
(d) 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.
(10)
SECTION B
5. Answer any four of the following:
(10 × 4 = 40)
(a) Discuss various types of membranes.
(b) Write the design procedure of either torispherical head or elliptical head.
(c) Mention the principal stresses induced in a vessel. How they act over the vessel.
(d) Differentiate between pneumatic and electronic controllers.
(e) List the various liquid level measuring instruments. Give their range and applications.
6. (a) Compare and contrast the terms— osmosis” and “reverge osmosis”.
(10)
(b) Discuss the principles of ultrafiltration. Mention its applications.
(10)
(c) Describe the processes of dialysis and also of electrodialysis. Write their applications.
(10)
(d) Briefly discuss about “Super critical fluid extraction”.
(10)
7. (a) Discuss the selection of material of construction for pressure vessels.
(10)
(b) Explain the design procedure for vertical type storage vessels.
(c) Mention various types of heads commonly used in cylindrical vessels and list their
applications.
(10)
(d) Define joint efficiency. Mention the factors influencing the choice of supports.
(10)
8. (a) Explain the working principles involved in various pressure measuring instruments.
(10)
(b) (i) Explain the negative and positive feedback control system.
(5)
(ii) Explain the servo and regulatory control problems.
(5)
(c) What are the elements of computer based process control? Explain their functions.
(10)
(d) What are phase and gain margins? Discuss the bode stability criterion.
No comments:
Post a Comment