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Textile Engineering Gate 2021 Questions with Answer

Ques 40 GATE 2021

Determine the correctness or otherwise of the following Assertion [a] and Reason [r]
Assertion: Draw texturing of isotactic polypropylene (POY) at a relatively high speed is possible despite high crystallinity of the feeder yarn.
Reason: Isotactic polypropylene (POY) has majorly smectic mesomorphic phase.

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 2021

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

A

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

B

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

C

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

D

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


(b) is the correct answer.

Ques 42 GATE 2021

In melt spinning, the mass throughput rate of polymer is 210 g/min, the winding speed is 3000 m/min, and the linear density of the yarn produced is 200 denier. The effective draw ratio, (rounded off to two decimal places), is


(3.00 to 3.30) is the correct answer.

Ques 43 GATE 2021

The molecular weight (M) of a polymer is determined from Mark-Houwink Equation by using coefficient K=11.5 x10-3ml/g and exponent a=0.73. If the measured intrinsic viscosity [η] of the solution is 6.0x102ml/g then the value of Mx10-6, (rounded off to two decimal places), is


(2.70 to 3.10) is the correct answer.

Ques 44 GATE 2021

Cotton fibre length variation can be expressed by

A

Uniformity index

B

Limit irregularity

C

U%

D

Index of irregularity


(a) is the correct answer.

Ques 45 GATE 2021

A high value of drape coefficient indicates

A

Limp fabric

B

Stiff fabric

C

Compressible fabric

D

Smooth fabric


(b) is the correct answer.

Ques 46 GATE 2021

A textile filament records a tensile stress of 0.3 GPa at a tensile strain of 0.04. Assuming Hookean behavior, the tensile modulus (GPa) of the filament, (rounded off to one decimal place), is


(7.5) is the correct answer.

Ques 47 GATE 2021

Number of fibres, each of 40 mm length and 0.16 tex fineness, in a tuft of 24 mg mass is


(3745 to 3755) is the correct answer.

Ques 48 GATE 2021

If the ratio of the linear densities (denier) of two circular fibers is 3, the corresponding ratio of their diameters, (rounded off to two decimal places), is


(1.70 to 1.75) is the correct answer.

Ques 49 GATE 2021

If the sample size (n) is 25 and the standard deviation ($sigma$) of population is 2, then the standard error (SE) of sample mean, (rounded off to one decimal place), is


(0.4) is the correct answer.

Ques 50 GATE 2021

Techniques used for determination of orientation in fibres from amongst the followings are
P Birefringence measurement
Q Scanning electron microscopy
R X-ray diffraction
S Differential scanning calorimetry

A

P and Q

B

P and R

C

Q and R

D

Q and S


(b) is the correct answer.

Ques 51 GATE 2021

The typical shapes of comb sorter diagram and fibrogram of polyester fibres of equal cut length will be

A

Triangular and rectangular respectively

B

Rectangular and triangular respectively

C

Rectangular and S-shaped respectively

D

S-shaped and triangular respectively


(b) is the correct answer.

Ques 52 GATE 2021

In Classimat system, the yarn fault H2, as compared to yarn fault C3, is

A

Thicker and longer

B

Thicker and shorter

C

Thinner and longer

D

Thinner and shorter


(c) is the correct answer.

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