Download GTU BE/B.Tech 2018 Winter 3rd Sem Old 130504 Process Calculation Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 3rd Sem Old 130504 Process Calculation Previous Question Paper

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1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?III (OLD) EXAMINATION ? WINTER 2018
Subject Code:130504 Date:01/12/2018

Subject Name:Process Calculation

Time:10:30 AM TO 01:30 PM Total Marks: 70

Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

Q.1 (a) Define and explain the terms:-Normality, Molality, Molarity. 07
(b) In a double effect evaporator plant, the second effect is maintained under vacuum of
345 torr. Find the absolute pressure in kgf/cm
2
, kPa, atm, N/m
2
, bar, psi and mm Hg.
07

Q.2 (a) Classify the material balance. 07
(b) An aqueous solution of sodium chloride is prepared by dissolving 25 kg of sodium
chloride in 100 kg of water. Determine (a) weight % and (b) mole % composition of
solution.
07
OR
(b) Explain the material balance of extractor. 07

Q.3 (a) Define and explain the terms:- Raoult?s Law, Dalton?s Law 07
(b) Explain the material balance of crystallizer. 07
OR
Q.3 (a) Explain: (i) Watson equation and (ii) Riedel equation. 07
(b) With a neat sketch show the material balance for the following unit operation: (i)
distillation (ii) evaporation.
07

Q.4 (a) Explain standard heat of reaction and standard heat of combustion. 07
(b) Discuss the importance of recycling, bypassing and purge operation. 07
OR
Q.4 (a) Explain importance of process flow sheet in Chemical Engineering Industry with a
typical example.
07
(b) A weight of 1.10 kg of carbon dioxide occupies a volume of 33 liter at 300 K. Using
the Van der Waals equations of state, calculate the pressure. Data: For CO2, take a =
3.60 [(m
3
)
2
.kPa]/(kmol)
2
and b = 4.3 x 10
-2
m
3
/kmol.
07

Q.5 (a) Write a short note on Orsat analysis. 07
(b) Why excess air is provided for combustion process? 07
OR

Q.5 (a) Discuss Proximate and Ultimate analysis of coal. 07
(b) A gas mixture has the following composition by volume: Ethylene: 35.6%, Benzene:
24.5%, Oxygen: 1.3%, Methane: 15.5%, Ethane 20.0%, Nitrogen: 3.1%. Find: (a) the
average molar mass of the gas mixture, (b) the composition by mass and (c) the
density of gas mixture in kg/m3 at NTP.
07


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