Yarn Manufacturing-1 question paper (TE 201) from University of Chittagong's 2012 second-year finals, 60 marks. Questions cover carded yarn process flows, porcupine beaters, ultra cleaner machines, blow room trash calculations, carding settings, and auto levelers.
B. Sc. In Textile Engineering
2nd year Final Examination 2012
Subject: Yarn Manufacturing-1 (Code-TE 201)
Time- 3 hrs | Total marks: 60 |
Answer any 5 (five) questions
1. (a) Write the process flow-chart of carded yarn manufacturing, mention their end product in each stage.
(b) Define mixing and blending with their importances.
(c) What is by-pass system? Write its utility.
(d) Describe the working principle of porcupine beater.
(3+3+2+4=12)
2. (a) What are the major and minor cleaning points in blow-room? Give their example.
(b) Describe the working principle of ultra cleaner machine with necessary sketch.
(c) What are the basic operations involved in blow-room?
(d) A lap contains 2% trash after processed in the blow-room having cleaning efficiency 75%. Find out the trash % in raw cotton.
(2+5+2+3=12)
3. (a) Define carding and stripping.
(b) Write the five important setting points in carding with their impact in changing.
(c) 36 carding machines of a carding department is running 24 hours with following data, find out the running time of blow-room machines:
Required time of a carding machine to end a lap = | 3 hours |
Carding machine efficiency = | 80% |