Introduction to chemical engineering Jntu Model Paper{Www.Studentyogi.Com}

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Code No: 07A10801
Set No. 1
I B.Tech Regular Examinations, May/Jun 2008
INTRODUCTION TO CHEMICAL ENGINEERING
(Chemical Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
1. (a) Explain the dimensional similarity.
(b) Explain Bucking method of dimensional analysis.
(c) Write the physical signi cance of Reynolds number, Froude number, Euler
number, Nusselt number. [4+4+8]
2. (a) De ne Yr and Yp.
(b) Explain the dew point and molar humidity.
(c) Obtain relation between Yr and Yp. When are both equal. [6+5+5]
3. (a) State and explain one dimensional and three dimensional ow.
(b) Explain the characteristics curves of centrifugal pump. [8+8]
4. Write notes on multiple e ect evaporation and methods of feeding with suitable
diagram. [16]
5. (a) Explain the process of di usion with help of molecular theory.
(b) Describe about the rate of di usion in solids, liquids and gases.
(c) De ne di usivity and give units. What are the variables which e ect di usiv-
ity. [5+6+5]
6. Discuss in details the following:
(a) Equilibrium distillation
(b) Di erential distillation.
[8+8]
7. (a) Write about the selection of dispersion phase for liquid-liquid extraction.
(b) Describe rotating disk and centrifugal extractors. [8+8]
8. (a) De ne free moisture content.
(b) Explain constant rate period and falling rate period.
(c) What is penduler state? [4+8+4]

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Code No: 07A10801
Set No. 2
I B.Tech Regular Examinations, May/Jun 2008
INTRODUCTION TO CHEMICAL ENGINEERING
(Chemical Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
1. (a) Di erentiate between crushing and grinding.
(b) Explain the applications of size enlargement.
(c) Write short notes on electro dialysis. [6+6+4]
2. (a) Describe the di erent types of ow diagram.
(b) Di erentiate between bypass, purge and recycle. [10+6]
3. (a) De ne uid and classify the uids with suitable examples.
(b) Di erentiate between single and multi stage pumps.
(c) What is pump? Explain brie y recipro cating pumps. [8+4+4]
4. (a) De ne log mean temperature and log mean area.
(b) Explain the signi cance of heat transfer co e cients.
(c) Write the classi cation of heat transfer equipments. [4+4+8]
5. (a) What are absorption and desorption processes? Explain with suitable exam-
ples.
(b) Absorption and Desorption processes may be handle in two ways what are
they? Explain.
(c) Describe the essential features and operation of packed absorption column and
mention the three main steps in its design. [4+4+8]
6. Compare the packed towers with tray towers and also discuss merits & demerits.
[16]
7. (a) Draw a neat sketch of a triangular diagram and explain how the binodal curve
and tie- line can be represented for the system.
(b) What are the di erences between a countercurrent and a crosscurrent cascade?
(c) In a ternary extraction system, what are the solute, solvent, and carrier?
[6+6+4]
8. (a) Explain divided xed bed reactor with inter cooling between catalyst beds.
(b) Di erentiate between uidized and semi uidized beds. [10+6]

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Code No: 07A10801
Set No. 3
I B.Tech Regular Examinations, May/Jun 2008
INTRODUCTION TO CHEMICAL ENGINEERING
(Chemical Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
1. Discuss brie y:
(a) Flotation
(b) Filtration.
[2×8=16]
2. De ne material balance and enumerate the di erent steps to follow in material
balance calculations. [16]
3. (a) What is uid? Describe the nature of a uid.
(b) Distinguish between laminar and turbulent ow. Draw the velocity pro les in
pipes for various types of ows. [8+8]
4. (a) Explain the mechanism of heat transfer by thermal radiation.
(b) What is a perfectly black body and describe Fery’s black body?
(c) State the following and explain:
i. Stefan’s-Boltzmann law
ii. Plank’s law. [4+4+8]
5. (a) Obtain the expressions for height of absorption column in terms of overall gas
phase mass transfer coe cient.
(b) What is necessary condition for absorption to take place? De ne active com-
ponent.
(c) De ne Fick’s law of di usion. [8+4+4]
6. (a) What is re ux and re ux ratio
(b) Write short notes on applications of distillation
(c) Write short notes on azeotropes
(d) Name minimum four types of packing materials. [4+4+4+4]
7. Write short notes on:
(a) Mixer settler
(b) Pulse column
(c) Triangular diagram
(d) Bubble cap. [4×4]

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Code No: 07A10801
Set No. 3
8. (a) Explain in detail about adsorption.
(b) Di erentiate between reactivation and regeneration.
(c) Write short notes on Vander Waals adsorption. [8+4+4]

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Code No: 07A10801
Set No. 4
I B.Tech Regular Examinations, May/Jun 2008
INTRODUCTION TO CHEMICAL ENGINEERING
(Chemical Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
1. Discuss brie y:
(a) Flotation
(b) Screening.
[2×8=16]
2. (a) Energy associated with mass be classi ed in a number of ways. What are
these?
(b) What are the di erent ways by which energy that is not asso ciated with in
the mass classi ed?
(c) De ne standard heat of reaction and discuss about heat of reaction at constant
pressure and constant volume. [5+2+9]
3. (a) With the help of a neat gure discuss about the development of a boundary
layer on a at plate.
(b) Write the expression for thickness of boundary layer if the boundary layer is
laminar and turbulent, respectively. [12+4]
4. (a) Explain the mechanism of heat transfer by thermal radiation.
(b) What is a perfectly black body and describe Fery’s black body?
(c) State the following and explain:
i. Stefan’s-Boltzmann law
ii. Plank’s law. [4+4+8]
5. (a) Mass transfer may o ccurs in di erent ways, name any ve.
(b) What are phenomena that must exists in a mass transfer opeartion.
(c) There are many similarities and di erences between various mass transfer
operations mention them. [5+3+8]
6. (a) Derive Rayleigh’s equation and mention assumption involved in it.
(b) Write short notes on selection of equipment for gas-liquid operations. [8+8]
7. (a) Write short notes on:
i. Cross current
ii. Counter current.
(b) Explain the terms “extract” and ra nate. [10+6]

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Code No: 07A10801
Set No. 4
8. (a) Explain tray drier with neat sketch.
(b) Di erentiate between wet bulb and dry bulb temperature. [10+6]