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Textile Engineering Gate 2020 Questions with Answer

Ques 40 GATE 2020

Determine the correctness or otherwise of the following Assertion [a] and Reason [r]
[a]: Caprolactam is polymerized in the presence of small amount of water to produce fibre grade nylon 6.
[r]: Water acts as a catalyst and converts caprolactam to aminocaproic acid.

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


(a) is the correct answer.

Ques 41 GATE 2020

Determine the correctness or otherwise of the following Assertion [a] and Reason [r]
[a]: Melting point of nylon 66 fibre is much higher than that of polyethylene fibre.
[r]: The molecular weight of nylon 66 fibre is significantly higher than that of polyethylene fibre.

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


(d) is the correct answer.

Ques 42 GATE 2020

In the production of PET, diglycol terephthalate (DGT) is an intermediate. Taking the atomic weights of H=1, C=12, O=16, the molecular weight of DGT is


(254) is the correct answer.

Ques 43 GATE 2020

In wet spinning of acrylic filament yarn, the volumetric flow rate of the spinning dope per spinneret hole is 0.1 cm³/min. If the surface speed at the first take up roller is 1.5 m/min and the diameter of spinneret hole is 0.02 cm, then the jet stretch (rounded off to 2 decimal places) is


(0.46 to 0.48) is the correct answer.

Ques 44 GATE 2020

Two types of polyester staple fibers of fineness 3 and 6 denier and having the same length are mixed in a ratio of 2:3 by weight. The mean fibre fineness (denier) of the mix (rounded off to 2 decimal places) is


(4.25 to 4.35) is the correct answer.

Ques 45 GATE 2020

Two yarns have variance of strength as V1 and V2 If V1<V2, the variance ratio F would be

A

V2/V1

B

V1/V2

C

V12/V2 2

D

V2 2 /V12


(a) is the correct answer.

Ques 46 GATE 2020

Cotton fibre length parameter that CANNOT be obtained from Baer Sorter diagram is

A

Mean length

B

Dispersion

C

Uniformity ratio

D

Modal length


(c) is the correct answer.

Ques 47 GATE 2020

The length (km) of 5 kg of 30 Ne yarn (rounded off to the nearest integer) is _______.


(253 to 255) is the correct answer.

Ques 48 GATE 2020

The limit irregularity and measured irregularity of a yarn are 8.4% and 9.6%, respectively. The Index of Irregularity (rounded off to 2 decimal places) is _________.


(1.10 to 1.15) is the correct answer.

Ques 49 GATE 2020

Consider two yarns, one 100% wool and the other 100% cotton, each containing 100 fibres in the yarn cross-section. The respective limit irregularities (%) of wool and cotton yarns will approximately be

A

11.2 and 10.6

B

10.6 and 11.2

C

11.8 and 11.2

D

11.8 and 10.6


(a) is the correct answer.

Ques 50 GATE 2020

If the numerical value X of yarn linear density, expressed in denier is the same as that expressed in English (Ne) system, then X approximately is

A

24.3

B

48.6

C

72.9

D

97.2


(c) is the correct answer.

Ques 51 GATE 2020

A cotton fiber has a degree of cell wall thickening (θ) of 0.9 and a perimeter of 40 μm. What is the actual cross-sectional area of the wall (in μm2), rounded off to one decimal place?


(112.0 to 117.0) is the correct answer.

Ques 52 GATE 2020

A fabric with a mass per unit area of 250 g/m² has a flexural rigidity of 275 μN⋅m. What is the bending length (in mm) of the fabric, rounded off to two decimal places?


(46.00 to 50.00) is the correct answer.

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