Yarn Manufacturing-II exam (TE-3101) from the University of Dhaka's 2018 Level-3 Term-1 finals, 60 marks. Questions cover super lap former production numericals, push bar drawing frames, simplex gear changes, and ring frame doffing time calculations.
BSc in Textile Engineering Level-3, Term-1 Final Examination-2018
Course Code: TE-3101, Course Title: Yarn Manufacturing-II
Full Marks: 60 | Time-3 Hours |
Answer any five (05) from the following. The figures in the right hand margin indicate full marks.
1. (a) What are the objects of combing? | 2 |
(b) Sketch the working principle of super lap former. | 5 |
(c) A lap former is producing 70 ktex mini-lap at 130 mmin^{-1} delivery speed. Calculate the production per shift and doffing time of that machine. (lap wt. 25 Kg) | 5 |
2. (a) Describe the function of push bar drawing frame with necessary sketch. | 6 |
(b) Calculate the production per hour per frame if the spindle speed is 14000 rpm which run at 95% efficiency for 30 Ne knit yarn, T.P.I 19 and the no of spindle per frame is 480. | 4 |
(c) What are the effects of combing on yarn quality? | 2 |
3. (a) Describe the gear change positions of simplex machine. | 4 |
(b) What are the task for balloon control ring and separator? | 2 |