Textured and Fancy Yarns - Yarn Manufacture, Yarn Structure and Properties - Textile Engineering & Fibre Science Previous Year Questions

1

2007 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Textured and Fancy Yarns

Textile Engineering & Fibre Science (TF) 2007

The process of drawing of as-spun filaments to impart orientation is typically carried out at temperatures

A

Just above glass transition (Tg)

B

Near melting point (Tm)

C

Below Tg

D

Near softening point

Open complete paper

2

2007 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Textured and Fancy Yarns

Textile Engineering & Fibre Science (TF) 2007

Out of the following, the technology that produces S & Z twists in the same yarn is

A

Rotor spinning

B

Ring spinning

C

Wrap spinning

D

Self twist spinning

Open complete paper

3

2007 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Textured and Fancy Yarns

Textile Engineering & Fibre Science (TF) 2007

Bulking of the filaments CANNOT be achieved by

A

False twist texturing process

B

Non-circular cross-sections of individual filaments

C

Differential shrinkage of bicomstituent yarn

D

Thermo-mechanical setting under taut conditions

Open complete paper

4

2008 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Textured and Fancy Yarns

Textile Engineering & Fibre Science (TF) 2008

Air jet texturing makes multifilament yarn more suitable as weft in air jet weaving. Because the yarn becomes

A

Rigid and does not bend in the shed

B

Smooth and helps to reduce friction with warp

C

Bulkier and results in high propelling force

D

Heavier and produces high kinetic energy

Open complete paper

5

2013 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Textured and Fancy Yarns

Textile Engineering & Fibre Science (TF) 2013

Consider the following assertion [a] and reason [r] and choose the most appropriate answer
[a] In false-twist friction texturing, the ratio of input to output tension is kept close to one
[r] Broken filaments and tight spots are within the acceptable limits at this condition

A

[a] is right [r] is wrong

B

[a] is right [r] is right

C

[a] is wrong [r] is wrong

D

[a] is wrong [r] is right

Open complete paper

6

2014 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Textured and Fancy Yarns

Textile Engineering & Fibre Science (TF) 2014

Consider the following assertion [a] and reason [r] and choose the most appropriate answer.
[a] Cut and crush method for tow to top conversion uses cutting roller with embedded helical blade
[r] This helps to impart crimp in the cut fibres

A

[a] is right [r] is wrong

B

[a] is right [r] is right

C

[a] is wrong [r] is wrong

D

[a] is wrong [r] is right

Open complete paper

7

2021 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Textured and Fancy Yarns

Textile Engineering & Fibre Science (TF) 2021

Determine the correctness or otherwise of the following Assertion [a] and Reason [r]
Assertion: Draw texturing of isotactic polypropylene (POY) at a relatively high speed is possible despite high crystallinity of the feeder yarn.
Reason: Isotactic polypropylene (POY) has majorly smectic mesomorphic phase.

A

Both [a] and [r] are true and [r] is the correct reason for [a]

B

Both [a] and [r] are true but [r] is not the correct reason for [a]

C

Both [a] and [r] are false

D

[a] is true but [r] is false

Open complete paper