AT
Textile Technoloav Paper-I

Time: 2 hours
Full Marks: 100
The figures in the right-hand margin indicate marks. Answer Q. No.1 ofGroup which is compulsory and four questions from Group -B.
Group-A
1. Answer all questions in brief: 2x20 =40

Why long man made fibres improve production rate in ring spinning?


Justifywhyfinerfibres are suitable to produce strong and uniform yarn.


For what reasons vibrating doffer comb in card is not suitable for high production machine?


State the purpose of placing floating condenser in a cotton speed frame.


XD (Turnover)

state the functions oftop comb in a,cotton comber.


What is F. Q. I. and why it is important?


Define span length of a fibre and its importance.


What is the purpose of mixing different cotton fibres in spinning?


state the merits ofchute feed system to card

overlap feed system.
Define Nm and Lea count of yarn.



What do you mean by CVm in Uster Yarn irregularity result?


state the importance of Drape testing of apparel fabric.


What is the standard condition of testing of textile materials?


What is RKM value of yarn and state its relation with tenacity


State the purposes of sizing in warp preparation for weaving.


XD -112 Contd.
State the purpose of back rest in a power
loom.
Differentiate between a projectile and a rapier
loom.
Define a square fabric.
Classify the different weft insertion systems.
Differentiate between a cop anda pirn.
Group-B
2. Discuss the properties of cotton fibres
required to spin quality yarn. 6
What are the objects of blending? What do
you mean by compatible fibre for ideal
blending? 6
Define cleaning efficiency of a blow room. 3
3. "Drafting generates irregularities" -Discuss.
6
"Lap preparation before comber is important
in cotton processing system" -Discuss.· 6
state the functions of flyer top. 3

XD (Turn over)
4. Discuss the limitations of ring spinning system and the ways to overcome them. 6

Classify modern spinning systems and their suitable yarn count range. 6


Distinguish structures amongst Ring, Rotor and Air-jet spun yams. 3


5. What are the advantages of winding? Discuss the principle of Precision Winding.
6

Discuss the different types of take up motions used in various looms. 6


state the functions of a modern sow box. 3


6.
With the help of suitable sketches, disucss the mechanism of weft insertion in Air-jet

7.
What are the properties required to be tested to reproduce a fabric and name the instruments used to carry out the tests? 6


What is yarn numbering and how it is classified? Deduce a relation between Nm and Ne. 6

What isthe importance ofTwist Multiplier?
"
State the formula to calculate TPI, TM and Count of yarn 3

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