Wet Preparatory Process exam (WPE 201) from BUTEX affiliated colleges' 2024 Level-2 Term-I finals. Includes surfactant classification, dirt removal mechanisms, gas singeing machines, enzymatic desizing, J-box bleaching, and mercerization with BAN determination.
Level-2 Term-I, Final Exám-2024
Subject: Wet Preparatory Process (Code: WPE 201)
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) Define surface active agent and classify surfactants with examples.
(b) Compare the properties and uses of soap and synthetic detergents in wet processing.
(c) Describe the mechanism of dirt removal by detergents.
[4+4+4=12]
2. (a) What is singeing? Why is it done for woven fabrics?
(b) Describe the working principle of a gas singeing machine with figure.
(c) List the key factors affecting gas singeing efficiency.
[4+5+3=12]