Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 5th Sem New 2150404 Principles Of Process Engineering Ii Previous Question Paper
1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?V (NEW) EXAMINATION ? WINTER 2018
Subject Code:2150404 Date:20/11/2018
Subject Name:Principles of Process Engineering-II
Time: 10:30 AM TO 01:00 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) Explain the following terms with respect to tray
towers:
(i) Flooding (ii) Priming (iii) Coning
03
(b) Differentiate between packed tower v/s tray tower. 04
(c) Derive equations to calculate rate of steady state diffusion of ?A? through
non-diffusing ?B? and also for steady state equimolal counter diffusion in
case of gases.
07
Q.2 (a) Define: (i) Tie-line (ii) Operating line (iii) Raffinate 03
(b) What are different types of packing. 04
(c) Compare surface renewal and Penetration theories. 07
OR
(c) Differentiate between direct and indirect mass transfer operations with
examples.
07
Q.3 (a) Discuss local and overall mass transfer coefficients. 03
(b) Explain steps to determine minimum liquid to gas ratio for absorbers. 04
(c) Explain counter current multiple contact, Shanks system for leaching with
neat figure.
07
OR
Q.3 (a) With neat diagram discuss Venturi Scrubber. 03
(b) Explain criteria of solvent selection for gas absorption. 04
(c) A packed tower is to be designed to absorb sulfur dioxide from air by
scrubbing the gas with water. The entering gas is 18.6% SO
2
by volume. The
water flow is to be 2.3times the minimum. The air flow rate (SO
2
free basis)
is 1100 m
3
/hr. The temperature is 30
o
C and the total pressure is 2 atm. The
equilibrium data is governed by y=21.8x where y and x are in mole fractions
units. Compute the number of overall gas phase transfer units.
07
Q.4 (a) Explain preparation of solids for leaching. 03
(b) Explain material balance for single stage extraction. 04
(c) Discuss in detail about Film theory for mass transfer coefficient. 07
OR
Q.4 (a) Explain the following terms with respect to tray
towers:
(i) weeping (ii) dumping (iii) tray spacing
03
(b) Write short note on gas absorption with chemical reaction. 04
(c) Derive equation for material balance for single stage countercurrent leaching. 07
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?V (NEW) EXAMINATION ? WINTER 2018
Subject Code:2150404 Date:20/11/2018
Subject Name:Principles of Process Engineering-II
Time: 10:30 AM TO 01:00 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) Explain the following terms with respect to tray
towers:
(i) Flooding (ii) Priming (iii) Coning
03
(b) Differentiate between packed tower v/s tray tower. 04
(c) Derive equations to calculate rate of steady state diffusion of ?A? through
non-diffusing ?B? and also for steady state equimolal counter diffusion in
case of gases.
07
Q.2 (a) Define: (i) Tie-line (ii) Operating line (iii) Raffinate 03
(b) What are different types of packing. 04
(c) Compare surface renewal and Penetration theories. 07
OR
(c) Differentiate between direct and indirect mass transfer operations with
examples.
07
Q.3 (a) Discuss local and overall mass transfer coefficients. 03
(b) Explain steps to determine minimum liquid to gas ratio for absorbers. 04
(c) Explain counter current multiple contact, Shanks system for leaching with
neat figure.
07
OR
Q.3 (a) With neat diagram discuss Venturi Scrubber. 03
(b) Explain criteria of solvent selection for gas absorption. 04
(c) A packed tower is to be designed to absorb sulfur dioxide from air by
scrubbing the gas with water. The entering gas is 18.6% SO
2
by volume. The
water flow is to be 2.3times the minimum. The air flow rate (SO
2
free basis)
is 1100 m
3
/hr. The temperature is 30
o
C and the total pressure is 2 atm. The
equilibrium data is governed by y=21.8x where y and x are in mole fractions
units. Compute the number of overall gas phase transfer units.
07
Q.4 (a) Explain preparation of solids for leaching. 03
(b) Explain material balance for single stage extraction. 04
(c) Discuss in detail about Film theory for mass transfer coefficient. 07
OR
Q.4 (a) Explain the following terms with respect to tray
towers:
(i) weeping (ii) dumping (iii) tray spacing
03
(b) Write short note on gas absorption with chemical reaction. 04
(c) Derive equation for material balance for single stage countercurrent leaching. 07
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2
Q.5 (a) Enlist industrial applications of gas absorption and leaching. 03
(b) Explain criteria of solvent selection for extraction. 04
(c) Write short note on Bollman extractor with neat sketch. 07
OR
Q.5 (a) Explain fick?s law of diffusion. 03
(b) Explain different components of tray tower. 04
(c) Define liquid extraction giving typical example. Explain
equilateral?triangular co-ordinate and the mixture rule.
07
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This post was last modified on 20 February 2020