Nonwoven Manufacture - Fabric Manufacture, Structure and Properties - Textile Engineering & Fibre Science Previous Year Questions

1

2007 · Textile Engineering & Fibre Science · Fabric Manufacture, Structure and Properties · Nonwoven Manufacture

Textile Engineering & Fibre Science (TF) 2007

Consider the following columns and choose the correct combination from amongst the alternatives A, B, C and D

Group I	Group II
P   Wet laid	1   Coarse fibre
Q   Spun lace	2   Hollow fibre
R   Spun bonded	3   Short fibre
S   Needle punched	4   Thermoplastic fibre
	5   Very flexible fibre
	6   Natural fibre

A

P-2, Q-6, R-4, S-3

B

P-3, Q-5, R-4, S-1

C

P-4, Q-3, R-2, S-3

D

P-5, Q-3, R-6, S-2

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2

2008 · Textile Engineering & Fibre Science · Fabric Manufacture, Structure and Properties · Nonwoven Manufacture

Textile Engineering & Fibre Science (TF) 2008

Fibres with a rectangular cross-section are preferred over those with trilobal cross-section for mechanically entangled nonwoven fabric, because rectangular cross-section

A

Provides high packing density of the web

B

Offers high strength to the web

C

Gives better hand value to the fabric

D

Entangles more easily than the trilobal fibre

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3

2013 · Textile Engineering & Fibre Science · Fabric Manufacture, Structure and Properties · Nonwoven Manufacture

Textile Engineering & Fibre Science (TF) 2013

The nonwoven process which has the highest production rate is

A

Needle punching

B

Hydroentangling

C

Melt blowing

D

Spunbonding

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4

2014 · Textile Engineering & Fibre Science · Fabric Manufacture, Structure and Properties · Nonwoven Manufacture

Textile Engineering & Fibre Science (TF) 2014

A needle-punched nonwoven fabric has 2 mm thickness and 400 g/m² areal density. If the fibre density is 0.9 g/cm³, the volume porosity (%) of the fabric, accurate to the nearest integer, will be ......

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5

2015 · Textile Engineering & Fibre Science · Fabric Manufacture, Structure and Properties · Nonwoven Manufacture

Textile Engineering & Fibre Science (TF) 2015

The technology/ies used for producing SMS fabric is/are

A

Spunlace

B

Spunlace and Meltblown

C

Needlepunch

D

Spunbond and Meltblown

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6

2016 · Textile Engineering & Fibre Science · Fabric Manufacture, Structure and Properties · Nonwoven Manufacture

Textile Engineering & Fibre Science (TF) 2016

In needle punching process, higher punch density CAN NOT cause

A

Lower web thickness

B

Higher change of fabric dimensions

C

Higher damage of fibres

D

Higher permeability of fabric

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7

2016 · Textile Engineering & Fibre Science · Fabric Manufacture, Structure and Properties · Nonwoven Manufacture

Textile Engineering & Fibre Science (TF) 2016

The least desired feature of fibre in wet laid nonwoven fabric is

A

High affinity for water

B

Low aspect ratio

C

High flexural rigidity

D

Low crimpiness

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8

2017 · Textile Engineering & Fibre Science · Fabric Manufacture, Structure and Properties · Nonwoven Manufacture

Textile Engineering & Fibre Science (TF) 2017

A perpendicular-laid nonwoven

A

Should not contain thermoplastic fibre

B

Does not form a 3-D structure

C

Cannot be used as a replacement of foam

D

Exhibits high recovery from compression

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9

2017 · Textile Engineering & Fibre Science · Fabric Manufacture, Structure and Properties · Nonwoven Manufacture

Textile Engineering & Fibre Science (TF) 2017

A needle loom, having a needle board with 2000 needles/m, is operating at a stroke frequency of 2000 strokes/min and producing a needle-punched nonwoven fabric at 5 m/min. The punch density, in number of punches per cm², is__________

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10

2018 · Textile Engineering & Fibre Science · Fabric Manufacture, Structure and Properties · Nonwoven Manufacture

Textile Engineering & Fibre Science (TF) 2018

Compared to filaments in spunbonded nonwovens, those in meltblown nonwovens have
P. Lower orientation of molecular chains
Q. Higher orientation of molecular chains
R. Lower variability in diameter
S. Higher variability in diameter

A

P & R only

B

P & S only

C

Q & R only

D

Q & S only

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11

2019 · Textile Engineering & Fibre Science · Fabric Manufacture, Structure and Properties · Nonwoven Manufacture

Textile Engineering & Fibre Science (TF) 2019

The punch density of a needle-punched nonwoven fabric is 50 punches/cm². If the stroke frequency of needle bed is doubled and the fabric delivery speed is halved, then the punch density (punches/cm²) would be

A

25

B

50

C

100

D

200

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12

2020 · Textile Engineering & Fibre Science · Fabric Manufacture, Structure and Properties · Nonwoven Manufacture

Textile Engineering & Fibre Science (TF) 2020

The technology that does NOT produce a nonwoven fabric is

A

Spunbonding

B

Hydroentangling

C

Meltblowing

D

Braiding

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13

2021 · Textile Engineering & Fibre Science · Fabric Manufacture, Structure and Properties · Nonwoven Manufacture

Textile Engineering & Fibre Science (TF) 2021

The nonwoven technology which uses high-pressure water jets is

A

Needlepunching

B

Spunlacing

C

Spunbonding

D

Meltblowing

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14

2022 · Textile Engineering & Fibre Science · Fabric Manufacture, Structure and Properties · Nonwoven Manufacture

Textile Engineering & Fibre Science (TF) 2022

Consider the following components of a needle:

P. Shank

Q. Beard

R. Barb

S. Latch

The combination of correct components of a needle in a needle punching nonwoven machine is

A

P and Q

B

Q and R

C

R and S

D

P and R

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15

2023 · Textile Engineering & Fibre Science · Fabric Manufacture, Structure and Properties · Nonwoven Manufacture

Textile Engineering & Fibre Science (TF) 2023

The bonding process followed for production of highloft nonwovens is

A

Needle punching

B

Hydroentanglement

C

Calendar bonding

D

Through-air bonding

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16

2024 · Textile Engineering & Fibre Science · Fabric Manufacture, Structure and Properties · Nonwoven Manufacture

Textile Engineering & Fibre Science (TF) 2024

Determine the correctness or otherwise of the following Assertion [a] and Reason [r]:
[a]: The variability of fibre diameter in melt-blown nonwoven fabric is remarkably higher than that in spunbond nonwoven fabric
[r]: Hot air attenuation in melt-blown process is responsible for high variation in fibre diameter

A

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

B

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

C

Both [a] and [r] are false

D

[a] is true but [r] is false

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17

2025 · Textile Engineering & Fibre Science · Fabric Manufacture, Structure and Properties · Nonwoven Manufacture

Textile Engineering & Fibre Science (TF) 2025

A needlepunching machine has two needle boards which operate sequentially at the same frequency to produce nonwoven with 200 punches/cm². Each needle board has 40000 needles per meter width. If the delivery speed of the machine is \(80\text{ m/min}\), then the frequency (strokes/min) of each needle board (answer in integer) is __________.

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18

2026 · Textile Engineering & Fibre Science · Fabric Manufacture, Structure and Properties · Nonwoven Manufacture

Textile Engineering and Fibre Science (TF) 2026

The following figure shows the position of a needle at its lowest position during needlepunching operation. If P, Q and R are barbs on the needle, then which is the correct order of barbs in terms of workload?

A

Q > P > R

B

P > R > Q

C

P > Q > R

D

R > P > Q

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