Finishing - Chemical Processing - Textile Engineering & Fibre Science Previous Year Questions

1

2007 · Textile Engineering & Fibre Science · Chemical Processing · Finishing

Textile Engineering & Fibre Science (TF) 2007

An increase in size add-on

A

Consistently increases weavability

B

Consistently decreases weavability

C

Increases weavability up to a certain limit then decreases

D

Does not change weavability

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2

2007 · Textile Engineering & Fibre Science · Chemical Processing · Finishing

Textile Engineering & Fibre Science (TF) 2007

Assertion: Citric acid does not produce crosslinks on cotton butane tetra carboxylic acid (BTCA) does
Reason: It is because citric acid is a tricarboxylic acid and can’t produce two anhydride groups which are essential for producing crosslinks

A

[a] is wrong, [r] is correct

B

[a] is correct, [r] is wrong

C

[a] is wrong, [r] is wrong

D

[a] is correct, [r] is correct

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3

2007 · Textile Engineering & Fibre Science · Chemical Processing · Finishing

Textile Engineering & Fibre Science (TF) 2007

The nitrogen add-on (%) is approximately

A

0.88

B

1.18

C

1.38

D

1.58

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4

2007 · Textile Engineering & Fibre Science · Chemical Processing · Finishing

Textile Engineering & Fibre Science (TF) 2007

The number of crosslinks per agu is approximately

A

0.007

B

0.07

C

0.7

D

7.0

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5

2008 · Textile Engineering & Fibre Science · Chemical Processing · Finishing

Textile Engineering & Fibre Science (TF) 2008

Wurlan process is used to make wool shrink resistant. The treatment involves

A

Masking scales by coating polyamide using interfacial polymerization

B

Removing scales by atmospheric electric discharge

C

Removing scales using sodium hypochlorite

D

Masking scales by coating polyether followed by cross linking

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6

2008 · Textile Engineering & Fibre Science · Chemical Processing · Finishing

Textile Engineering & Fibre Science (TF) 2008

In the context of foam finishing, the stability of foam increases if

A

The processing temperature is increased

B

Silicon based chemicals are added

C

Viscosity builders are added

D

Average bubble size is increased

Check answer

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7

2009 · Textile Engineering & Fibre Science · Chemical Processing · Finishing

Textile Engineering & Fibre Science (TF) 2009

Consider the elements in Group I and Group II and choose the correct alternative from amongst A, B, C and D.

Group I	Group II
P. Resin finishing	1. Polyester dyeing
Q. Carrier	2. Cellulase
R. Biopolishing	3. DMDHEU
S. Discharge printing	4. Hydrogen peroxide
	5. Pectinase
	6. Sodium sulphoxylate formaldehyde

A

P-3, Q-1, R-2, S-6

B

P-6, Q-1, R-4, S-3

C

P-3, Q-6, R-1, S-5

D

P-3, Q-6, R-4, S-1

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8

2009 · Textile Engineering & Fibre Science · Chemical Processing · Finishing

Textile Engineering & Fibre Science (TF) 2009

Saponification with sodium hydroxide is done to increase the soil release property of

A

Polyester

B

Cotton

C

Wool

D

Jute

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9

2010 · Textile Engineering & Fibre Science · Chemical Processing · Finishing

Textile Engineering & Fibre Science (TF) 2010

Compounds based on combination of nitrogen and phosphorus are used as

A

Water proofing agents

B

Antimicrobial agents

C

Flame retardants

D

Antistatic agents

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10

2011 · Textile Engineering & Fibre Science · Chemical Processing · Finishing

Textile Engineering & Fibre Science (TF) 2011

Determine the correctness or otherwise of the following assertion [a] and the reason [r].
[a] Phosphorus and nitrogen based agents act as vapour phase flame retardants for cotton.
[r] Phosphorus yields phosphoric acid and hinders formation of levoglucosan while nitrogen has a synergistic effect.

A

[a] is right and [r] is wrong

B

[a] is wrong and [r] is right

C

Both [a] and [r] are right

D

Both [a] and [r] are wrong

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11

2011 · Textile Engineering & Fibre Science · Chemical Processing · Finishing

Textile Engineering & Fibre Science (TF) 2011

Concentration (%) of the finish required in the bath is

A

0.2

B

3.2

C

5.0

D

32

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12

2011 · Textile Engineering & Fibre Science · Chemical Processing · Finishing

Textile Engineering & Fibre Science (TF) 2011

Finish consumed in kg/min is

A

2.16

B

2.70

C

5.00

D

5.40

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13

2013 · Textile Engineering & Fibre Science · Chemical Processing · Finishing

Textile Engineering & Fibre Science (TF) 2013

Crease resist finishing of cotton fabric does not lead to

A

Reduction in tensile strength

B

Increase in dimensional stability

C

Increase in moisture regain

D

Increase in bending length

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14

2013 · Textile Engineering & Fibre Science · Chemical Processing · Finishing

Textile Engineering & Fibre Science (TF) 2013

Consider the following assertion [a] and reason [r] and choose the most appropriate answer
[a] Heat setting increases the dimensional stability of synthetic fabrics
[r] The free energy reduces as a result of heating

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

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15

2013 · Textile Engineering & Fibre Science · Chemical Processing · Finishing

Textile Engineering & Fibre Science (TF) 2013

Consider the following assertion [a] and reason [r] and choose the most appropriate answer
[a] Controlled reduction treatments are commercially used for shrink resist finishing of wool
[r] Reduction disrupts the disulphide bonds, which are responsible for wool shrinkage

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

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16

2013 · Textile Engineering & Fibre Science · Chemical Processing · Finishing

Textile Engineering & Fibre Science (TF) 2013

The resin add-on after padding in kg per kg of fabric will be

A

0.1

B

0.2

C

0.3

D

0.4

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17

2013 · Textile Engineering & Fibre Science · Chemical Processing · Finishing

Textile Engineering & Fibre Science (TF) 2013

Assuming that the reaction takes place in amorphous region only and that the fabric crystallinity is 33%, the number of cross links formed per anhydroglucose unit after curing would be approximately

A

0.07

B

0.14

C

0.28

D

0.35

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18

2014 · Textile Engineering & Fibre Science · Chemical Processing · Finishing

Textile Engineering & Fibre Science (TF) 2014

A cotton fabric is finished with DMDHEU. As a result, its

A

Tensile strength decreases, abrasion resistance increases, stiffness decreases

B

Tensile strength decreases, abrasion resistance decreases, stiffness decreases

C

Tensile strength decreases, abrasion resistance decreases, stiffness increases

D

Tensile strength increases, abrasion resistance increases, stiffness decreases

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19

2014 · Textile Engineering & Fibre Science · Chemical Processing · Finishing

Textile Engineering & Fibre Science (TF) 2014

During burning, a flame retardant does NOT

A

Increase heat absorption

B

Reduce supply of oxygen

C

Increase char content

D

Lower glass transition temperature (Tg)

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20

2015 · Textile Engineering & Fibre Science · Chemical Processing · Finishing

Textile Engineering & Fibre Science (TF) 2015

Milling is associated with the processing of

A

Cotton fabric

B

Silk fabric

C

Jute fabric

D

Wool fabric

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