Wet Preparatory Process paper (WPE 201) from BUTEX affiliated colleges' 2024 Level-2 Term-I finals. Includes yarn dyed fabric flow charts, wool impurities, biopolishing with enzyme activity sketches, scouring chemistry, and mercerization with lustre explanations.
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) Why preparatory wet processing is required before textile coloration?
(b) Show the process flow chart of yarn dyed woven fabric.
(c) Mention the impurities present in wool fiber with their percentage. Mention the impurities present in wool fiber with their percentage.
(d) Write down the factors to be considered for pretreatment process.
[3+3+2+4 = 12]
2. (a) What is biopolishing? Explain the activity of enzyme on a substrate with a suitable sketch.
(b) Write down the advantages and disadvantages of biopolishing.
(c) Why enzyme inactivation is essential after biopolishing?