Special Wet Processing exam (WPE 409), 2023 Level-4 Term-II, BUTEX affiliated colleges. Questions cover foam application technology, solvent dyeing with perchloroethylene, supercritical CO2 dyeing of polyester, and ammonia mercerization machinery.
Level-4 Term-II, Final Exám-2023
Subject: Special Wet Processing (Code: WPE 409)
Time: 3.0 Hrs. Full Marks: 72
(Use separate answer script for Part: A and Part: B)
(All parts of a question must be answered consecutively)
Part: A
(Answer any three questions)
1. (a) How can one define foam? How is it possible to create foam?
(b) Give a general explanation of the Janus small and RSF foam application procedure along with the relevant figures.
(c) Write down the advantages and disadvantages of foam technology.
[2+6+4=12]
2. (a) Define solvent dyeing and list the essential characteristics and requirements of the solvents used.
(b) Describe how solvent dyeing works.
(c) Write down the advantages of using Perchloroethylene as solvent in dyeing.