Textile Engineering Gate 2012 Questions with Answer
Ques 27 GATE 2012
Softener reduces the bending rigidity of fabrics by decreasing
Ques 28 GATE 2012
In an experiment, 1 g each of the mercerized and unmercerized fabric samples are separately treated in 30 ml of 0.25N barium hydroxide solution for the required time. 10 ml of these solutions are drawn and titrated against 0.1N HCl solution. The volumes of HCl consumed at the end of these titrations are m for mercerized and u for unmercerized cases. If
Barium Activity Number (BAN)=[(b-m)/(b-u)]×100,
where m=18 ml, u=20 ml and b is the volume of HCl consumed in the blank titration, then the BAN value for the above mercerized sample is
Ques 29 GATE 2012
Assume that the rate of evaporation of moisture from a wet fabric during drying process is proportional to the amount of moisture present in the fabric. If 50% of the moisture is evaporated in the first 5 minutes then the time (min) taken to evaporate 90% of the moisture is approximately
Ques 30 GATE 2012
Sizing of single cotton yarn leads to an increase in
Ques 31 GATE 2012
Consider the following Assertion [a] and Reason [r]
[a] In the case of dyeing of cotton with reactive dyes, formation of hydrolyzed dye is a major problem.
[r] In an alkaline medium, the reactive dye reacts with the hydroxyl groups irrespective of whether these are from cellulose or water.
Determine the correctness or otherwise of the above Assertion [a] and Reason [r]
Ques 32 GATE 2012
Consider the following Assertion [a] and Reason [r]
[a] In the case of durable press finishing of cotton fabrics, while the citric acid can be used as a crosslinking agent, oxalic acid cannot be.
[r] The mechanism of crosslinking requires formation of anhydride in the intermediate step.
Determine the correctness or otherwise of the above Assertion [a] and Reason [r]
Ques 33 GATE 2012
Consider the following Assertion [a] and Reason [r]
[a] In the case of minimum application technique, compared to the conventional rolls of a typical padding mangle, Roberto rolls substantially reduce the wet pick up.
[r] The Roberto rolls are connected to vacuum pump to facilitate removal of liquor from the fabric.
Determine the correctness or otherwise of the above Assertion [a] and Reason [r]
Ques 34 GATE 2012
The density of a given polyester filament sample is 1.38 g/cm³. Consider the density of fully crystalline polyester as 1.455 g/cm³ and that of fully amorphous polyester as 1.335 g/cm³. The percent crystallinity of the sample is
Ques 35 GATE 2012
Consider the following Assertion [a] and Reason [r]
[a] In the case of manufactured fibre spinning, a circular spinneret orifice always results in circular cross-section of filaments in melt spinning, but the same is not true in dry spinning.
[r] Melt spinning involves only heat transfer, whereas dry spinning involves heat as well as mass transfer.
Determine the correctness or otherwise of the above Assertion [a] and Reason [r]
Ques 36 GATE 2012
Consider the following assertion [a] and reason [r] in the context of the load-elongation curves of fibres F₁, F₂ and F₃.
[a] Fibre F₃ is the most suitable fibre for making a rope for mountaineering.
[r] Mountaineering rope should have high tenacity, high modulus and high work of rupture.
Determine the correctness or otherwise of the above Assertion [a] and Reason [r]
Ques 37 GATE 2012
A cotton fibre of 180 millitex has a density of 1.5 g/cm³ and an average perimeter of 40 µm. The average area of the cell wall (µm²) is
Ques 38 GATE 2012
A cotton fibre of 180 millitex has a density of 1.5 g/cm³ and an average perimeter of 40 µm. The average degree of thickening of cell wall is approximately
Ques 39 GATE 2012
The fibre which has a mineral origin is
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