Short Staple Spinning-I exam (YE 205) from BUTEX affiliated colleges' 2024 Level-2 Term-I finals. Questions cover blow room operations with cleaning efficiency calculations, fine cleaning machines, scutcher working principles, and bale management for export quality yarn.
Level-2 Term-I, Final Exám-2024
Subject: Short Staple Spinning-I (Code: YE 205)
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 mixing is important? Write the factors to be considered before doing mixing.
(b) What is the most important component of a blow room? Why?
(c) Describe the working principle of a fine cleaning machine with sketch.
(d) Find out the B/R cleaning efficiency. If waste in raw cotton = 5%, waste in sliver = 0.3%, Carding cleaning efficiency = 82%.
[3+1+5+3 = 12]
2. (a) Why blow room called a blow room?
(b) Discuss the basic operations involved in the blow room.
(c) Calculate the production per hour of a blow room & number of laps where bottom calendar roller dia = 7 inches, rpm = 10, wt. of every yd lap = 12 Oz, & cleaning efficiency of 75%, lap weight 25 lbs.
[3+6+3 = 12]
3. (a) What is BIAS? Why is bale management important for exporting quality knitted yarn?
(b) Describe the working principle of the Scutcher m/c with a sketch.