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Textile Engineering Gate 2018 Questions with Answer

Ques 27 GATE 2018

Determine the correctness or otherwise of the following Assertion [a] and the Reason [r].
[a]: Emulsion thickener is used in pigment printing of textiles.
[r]: Emulsion thickener has high solid content.

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 28 GATE 2018

Match the dye-fibre in Group I with the interactions in Group II.

A

P-1, Q-2, R-4, S-3

B

P-1, Q-2, R-3, S-4

C

P-2, Q-1, R-4, S-3

D

P-2, Q-1, R-3, S-4


(c) is the correct answer.

Ques 29 GATE 2018

A crease resist (CR) agent is applied by padding to a fabric with a 1 m width and a 200 g/m² areal density. The concentration of the CR agent in the pad bath is 100 gpl, and the fabric speed is 50 m/min. The expression is 110%, and the specific gravity of the pad liquor is 1.1. What is the rate (in kg/min), accurate to one decimal place, at which the CR agent needs to be added to the bath to maintain the bath concentration?


(0.9 to 1.1) is the correct answer.

Ques 30 GATE 2018

A twistless polyester yarn has 90 filaments, each of 2 denier. The metric count of the yarn is


(49.8 to 50.2) is the correct answer.

Ques 31 GATE 2018

The cross-sectional shape of a fibre affects the following properties of yarn
P. Lustre
Q. Torsional rigidity
R. Flexural rigidity
S. Packing density

A

P & Q only

B

P & R only

C

P, Q & R only

D

P, Q, R & S


(d) is the correct answer.

Ques 32 GATE 2018

Determine the correctness or otherwise of the following Assertion [a] and the Reason [r].
[a]: The reaction temperature and rate of agitation during polymerization of polyethylene terephthalate have an important effect on molecular weight of the polymer produced.
[r]: Polymerization of polyester by melt polycondensation is a predominantly diffusion controlled process.

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 33 GATE 2018

Group I gives a list of fibres and Group II contains their applications. Match the fibre with its application.

A

P-4, Q-2, R-3, S-1

B

P-3, Q-4, R-2, S-1

C

P-3, Q-4, R-1, S-2

D

P-4, Q-1, R-2, S-3


(b) is the correct answer.

Ques 34 GATE 2018

Techniques used to determine the glass transition temperature of textile fibres are
P. X-ray diffraction (XRD)
Q. Differential scanning calorimetry (DSC)
R. Thermogravimetric analysis (TGA)
S. Dynamic mechanical analysis (DMA)

A

P & Q only

B

Q & R only

C

Q & S only

D

R & S only


(c) is the correct answer.

Ques 35 GATE 2018

If the density of 100% crystalline polyethylene is 1000 kg⋅m⁻³ and that of 100% amorphous polyethylene is 865 kg⋅m⁻³, what is the mass fractional crystallinity of a polyethylene fiber with a density of 970 kg⋅m⁻³, accurate to two decimal places?


(0.79 to 0.81) is the correct answer.

Ques 36 GATE 2018

Match the test in Group I with fabric property in Group II.

A

P-1, Q-2, R-3, S-4

B

P-1, Q-2, R-4, S-3

C

P-2, Q-1, R-3, S-4

D

P-2, Q-1, R-4, S-3


(b) is the correct answer.

Ques 37 GATE 2018

Determine the correctness or otherwise of the following Assertion [a] and the Reason [r].
[a]: The work factor of silk fibre is greater than 0.5.
[r]: The work factor is calculated by assuming the following as the stress-strain curve of silk 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 38 GATE 2018

In a vibroscope, a cotton fibre of 25 mm length is clamped at one end, led over a knife-edge support, tensioned by a weight of 350 mg, and is inclined to vibrate at a fundamental resonant frequency of 2.6 kHz. The linear density of the fibre (in tex), accurate to two decimal places, is


(0.19 to 0.21) is the correct answer.

Ques 39 GATE 2018

The theoretical limit coefficient of variation (Vr in %) of the weight per unit length of cotton sliver is Vr = 106/√N, where N is the average number of fibers present in the cross-section of the sliver. To derive this expression, what is the considered coefficient of variation (in %) of the fiber weight per unit length, accurate to two decimal places?


(35.00 to 36.00) is the correct answer.

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