Exam Details
| Subject | mass transfer - i | |
| Paper | ||
| Exam / Course | diploma engineering | |
| Department | ||
| Organization | Gujarat Technological University | |
| Position | ||
| Exam Date | May, 2018 | |
| City, State | gujarat, ahmedabad |
Question Paper
1/2
Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING SEMESTER 4(OLD) • EXAMINATION SUMMER 2018
Subject Code: 340504 Date: 04-May-2018
Subject Name: Mass Transfer I
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.
4. Each question carry equal marks (14 marks)
Q.1
Derive an equation for diffusivity (DAB=DBA).
07
(DAB=DBA)
07
Give Classification of Mass Transfer Operations based on direct contact of two immiscible phases.
Q.2
What is gas absorption? Explain Choice of solvent for absorption.
07
07
For extraction explain System of three liquids-one pair partially soluble with neat diagram.
OR
Explain construction, working and application of Kennedy extractor for leaching with neat sketch.
07
Q.3
What is extraction? Give Material balance for single stage extraction.
07
07
Derive a material balance equation for One component transferred in counter current flow in gas absorption.
OR
Q.3
Explain film theory for Interphase Mass Transfer in detail.
07
07
Derive an equation for steady state molecular diffusion in fluids for Laminar flow.
2/2
Q.4
Define Eddy diffusion Cascades Murphy efficiency
07
07
What is leaching? Explain Preparation of Solid for leaching in detail.
OR
Q.4
Explain continuous counter current decantation with flow sheets for Steady state leaching operation.
07
07
Derive an equation for Local overall mass transfer co-efficient.
Q.5
Oxygen is diffusing through carbon monoxide under steady state conditions, with the carbon monoxide non diffusing. The total pressure is 1×105 N/m2 and the temperature 00c. The partial pressure of oxygen at two planes 2 mm apart is respectively, 13000 and 6500 N/m2. The diffusivity for the mixture is 1.87×10 m2/s. calculate the rate of diffusion of oxygen in kmol/s through each square meter of the two planes.
07
00c,
13000 6500 N/m2 1.87×10 m2/s. kmol/s
07
Explain packed towers with neat sketch for gas absortion.
OR
Q.5
Explain leaching by Shanks system. And discuss effect of Temperature on leaching
07
07
Derive an equation for relation between NA PA for Equimolal counter current diffusion of A B.
A B NA PA
Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING SEMESTER 4(OLD) • EXAMINATION SUMMER 2018
Subject Code: 340504 Date: 04-May-2018
Subject Name: Mass Transfer I
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.
4. Each question carry equal marks (14 marks)
Q.1
Derive an equation for diffusivity (DAB=DBA).
07
(DAB=DBA)
07
Give Classification of Mass Transfer Operations based on direct contact of two immiscible phases.
Q.2
What is gas absorption? Explain Choice of solvent for absorption.
07
07
For extraction explain System of three liquids-one pair partially soluble with neat diagram.
OR
Explain construction, working and application of Kennedy extractor for leaching with neat sketch.
07
Q.3
What is extraction? Give Material balance for single stage extraction.
07
07
Derive a material balance equation for One component transferred in counter current flow in gas absorption.
OR
Q.3
Explain film theory for Interphase Mass Transfer in detail.
07
07
Derive an equation for steady state molecular diffusion in fluids for Laminar flow.
2/2
Q.4
Define Eddy diffusion Cascades Murphy efficiency
07
07
What is leaching? Explain Preparation of Solid for leaching in detail.
OR
Q.4
Explain continuous counter current decantation with flow sheets for Steady state leaching operation.
07
07
Derive an equation for Local overall mass transfer co-efficient.
Q.5
Oxygen is diffusing through carbon monoxide under steady state conditions, with the carbon monoxide non diffusing. The total pressure is 1×105 N/m2 and the temperature 00c. The partial pressure of oxygen at two planes 2 mm apart is respectively, 13000 and 6500 N/m2. The diffusivity for the mixture is 1.87×10 m2/s. calculate the rate of diffusion of oxygen in kmol/s through each square meter of the two planes.
07
00c,
13000 6500 N/m2 1.87×10 m2/s. kmol/s
07
Explain packed towers with neat sketch for gas absortion.
OR
Q.5
Explain leaching by Shanks system. And discuss effect of Temperature on leaching
07
07
Derive an equation for relation between NA PA for Equimolal counter current diffusion of A B.
A B NA PA
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