Common Data Questions
The feed rate of a card is 100 kg/hour and the delivery rate is 400 m/min. Licker-in droppings and flat strips are 3% and 1% respectively.
Question 52 (Textile Engineering & Fibre Science)
If the total draft in the card is decreased by 10%, the sliver linear density in ktex will be
| (A) | 6.4 |
| (B) | 5.4 |
| (C) | 4.4 |
| (D) | 3.4 |
[Show Answer]
Option C is correct
Given in the question-
Given in the question-
Feed rate of card=100 kg/hr
=100 x 1000/60 gm/min
=1666.66 gm/min
Delivery rate=400 m/min
Licker-in droppings=3%
Flat strips=1%
The count of card sliver(Ne)=?
Firstly we have to find gm/m
Now, tex is the weight of 1000 meter length
Tex=4166.65
Tex after total waste removed-
Total waste=Licker-in dropping+Flat stripe
Total waste=3%+1%
Total waste=4%
Tex=4166.65 x (1-Total waste%)
Tex=4166.65 x (1-4%)
Tex=4166.65 x (1-0.04)
Tex=4166.65 x 0.96
Tex=3999.984
Relationship between tex and Ne-
Ne=590.5/tex
Ne=590.5/3999.984
Delivered card sliver count(Ne)=0.15
Feed count(tex)=4.16665 x 1000
Feed count(tex)=4166.65
Now,
Total Draft=1.071
If total draft is decreased by 10%
Then, Draft=Total draft-Total draft x 10%
Draft=1.071-1.071 x 10%
Draft=1.071-1.071 x 0.1
New Draft=0.9639
Now,
, (In tex system)
Delivered count=4166.65/0.9639
Delivered count=4322.69 tex
Sliver linear density in ktex=4.32 (Ans)