Textile Engineering Gate 2013 Questions with Answer
Ques 27 GATE 2013
Choose the correct alternative from amongst A, B, C and D.
Mercerization of cotton results in
P. Increase in tensile strength
Q. Increase in dye uptake
R. Modification of crystal structure
S. Decrease in moisture regain
Ques 28 GATE 2013
In the case of reactive dyeing of cotton, the exhaustion is 70% and reaction efficiency is 80%. Assuming that the initial dye concentration is 2% on the weight of fabric, the amount of unreacted dye on the fabric expressed as a percentage of fabric weight would be
Ques 29 GATE 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
Ques 30 GATE 2013
Viscose fabric is to be resin finished with DMDHEU by pad-dry-cure method. Assume that
Mass of fabric per unit area: 200 g/m²
Width of fabric: 100 cm
Speed of the machine: 50 m/min
Concentration of pad liquor: 100 g/l
Wet pick up: 100%
Specific gravity of padding liquor: 1.0
Molecular weight of anhydroglucose unit: 162
The resin add-on after padding in kg per kg of fabric will be
Ques 31 GATE 2013
Viscose fabric is to be resin finished with DMDHEU by pad-dry-cure method. Assume that
Mass of fabric per unit area: 200 g/m²
Width of fabric: 100 cm
Speed of the machine: 50 m/min
Concentration of pad liquor: 100 g/l
Wet pick up: 100%
Specific gravity of padding liquor: 1.0
Molecular weight of anhydroglucose unit: 162
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
Ques 32 GATE 2013
The fibre that contains nitrogen and sulfur is
Ques 33 GATE 2013
Condensation polymerization is not used to produce
Ques 34 GATE 2013
Wet spinning technique is commercially used to produce filament yarn of
Ques 35 GATE 2013
The fibre that dissolves in 59% (w/w) sulfuric acid solution is
Ques 36 GATE 2013
Birefringence of filament yarn is related to its
Ques 37 GATE 2013
On twisting, the denier of a multifilament yarn consisting of 300 filaments of 3 denier each becomes 1100. If 11 km of untwisted filament yarn is twisted, its length in km will be
Ques 38 GATE 2013
Consider the following assertion [a] and reason [r] and choose the most appropriate answer.
[a] Nylon 6 is polymerized using only single monomer caprolactum
[r] Synthesis of Nylon 6 is basically an addition polymerization
Ques 39 GATE 2013
Consider the following assertion [a] and reason [r] and choose the most appropriate answer.
[a] Sodium cellulose xanthate formation is an essential unit operation in the production of viscose rayon
[r] It helps to reduce the degree of polymerization of cellulose
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