What topics are covered on Page 5 of GATE 2026 Textile Engineering questions?

Page 5 contains the final Questions 53 to 65. Topics include woven-fabric tear strength, disperse-dye fixation, acidic dyeing, PET polymer synthesis, PAN wet spinning, opening forces, fibre blending, fractional fabric cover, loom sley acceleration, moisture regain, yarn tensile modulus, cotton maturity testing and reactive-dye fixation.

Which factors increase the tear strength of woven fabric?

According to the GATE 2026 question, lower thread density and higher yarn float length are associated with higher woven-fabric tear strength when other parameters are kept constant.

Which fixation conditions can be used for disperse-dye printing on PET without a carrier?

The applicable fixation conditions are dry heat at about 200 degrees Celsius and high-pressure saturated steam at about 130 degrees Celsius.

How much ethylene glycol is required for 100 g of terephthalic acid to synthesize PET?

For a 1:1 molar ratio of terephthalic acid and ethylene glycol, 100 g of terephthalic acid requires 37.36 g of ethylene glycol.

What is the final diameter of the dried PAN filament?

For a 16 percent PAN solution extruded as a 100 micrometre filament with equal specific gravities of PAN and DMF, the final dried filament diameter is 40 micrometres.

What is the cotton content of the final cotton-polyester-viscose blended sliver?

After the two drawframe passages described in the question, the final cotton content of the cotton-polyester-viscose blended sliver is 30 percent.

What percentage of reactive dye is fixed on the cotton fabric in Question 65?

For the continuous dyeing process using 20 g/L reactive dye, 100 percent wet expression and a final shade of 1.5 percent on the weight of fabric, the percentage of dye fixed is 75 percent.

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Textile Engineering Gate 2026 Questions with Answer

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Ques 53 GATE 2026

Keeping all other parameters constant, which of the following factors is/are responsible for higher tear strength of woven fabrics?

Higher thread density

Lower thread density

Higher yarn to yarn friction

Higher float length of yarn in fabrics

(b,d) is the correct answer.

Ques 54 GATE 2026

Which one or more of the following conditions can be used for fixation in printing of PET fabric with disperse dye in absence of carrier?

Dry heat at about 200 °C

High pressure saturated steam at about 130 °C

Batching for 24 hour at the room temperature

Steam at 100 °C to 105 °C

(a,b) is the correct answer.

Ques 55 GATE 2026

Which one or more of the following fibre-dye combinations can be dyed in acidic pH?

Acrylic fibre with basic dye

PET fibre with disperse dye

Wool fibre with acid dye

Cotton fibre with vinylsulphone dye

(a,b,c) is the correct answer.

Ques 56 GATE 2026

High molecular weight PET is synthesised by maintaining two monomers in 1:1 molar ratio. If the mass of terephthalic acid (C₈H₆O₄) is taken as 100 g, then the mass of ethylene glycol (C₂H₆O₂) needed would be _______________ g. (rounded off to two decimal places)

(37.36) is the correct answer.

Ques 57 GATE 2026

Polyacrylonitrile (PAN) polymer was dissolved in dimethylformamide (DMF) at a concentration of 16 % (w/w) and extruded into a filament of 100 µm diameter. The filament was allowed to coagulate and dry while keeping its length constant. Assuming the specific gravities of both PAN and DMF as 1, the diameter of the final dried filament would be ________________ µm. (answer in integer)

(40) is the correct answer.

Ques 58 GATE 2026

On applying a constant force by an opening roller on a tuft of 16 g mass, the velocity of the tuft changes from 0.25 m/s to 27 m/s in 0.002 s. The magnitude of the force applied on the tuft is ______________ N. (answer in integer)

(214) is the correct answer.

Ques 59 GATE 2026

In the first drawframe passage, 4 cotton slivers and 4 polyester slivers of same linear density are blended to produce cotton-polyester blended sliver. In the second drawframe passage, 3 cotton-polyester blended slivers taken from the first passage are blended with 2 viscose slivers to produce cotton-polyester-viscose blended sliver. Considering all slivers fed to the second passage are of same linear density, the content of cotton fibres in the cotton-polyester-viscose blended sliver is ____________ %. (answer in integer)

(30) is the correct answer.

Ques 60 GATE 2026

For a jammed square plain woven fabric with yarns of circular cross-section, the fractional fabric cover is _______________. (rounded off to two decimal places)

(0.75) is the correct answer.

Ques 61 GATE 2026

The acceleration of the sley is given as Kr ω², where K is a function of angular position of crank, r is the radius of crank and ω is the angular velocity of crank shaft. When the angular position of crank is 45°, the value of K is ________________. (rounded off to two decimal places)

(0.71) is the correct answer.

Ques 62 GATE 2026

For a textile material, if the numerical value of the moisture regain (%) is double the numerical value of the moisture content (%), then the moisture content is __________ %. (answer in integer)

(50) is the correct answer.

Ques 63 GATE 2026

A 20 tex cotton yarn is tested on a tensile tester keeping a gauge length of 100 mm. The load-elongation behaviour of the yarn follows the relationship: L = 2.5×E, where L is load (cN) and E is elongation (mm). The tensile modulus of the yarn is _____________ cN/tex. (answer up to one decimal place)

(12.5) is the correct answer.

Ques 64 GATE 2026

During cotton fibre maturity test using caustic soda and microscope, all the fibres are found to be dead. The maturity ratio of the cotton fibre sample would be ____________. (answer up to one decimal place)

(0.0) is the correct answer.

Ques 65 GATE 2026

A cotton fabric is dyed by continuous method using 20 g/L solution of a reactive dye. The final shade of 1.5 % on the weight of the fabric is achieved after removal of all the unreacted and hydrolysed dye. Considering 100 % wet expression and specific gravity of the solution to be 1, the percentage of dye fixed on the fabric is _______________. (answer in integer)

(75) is the correct answer.

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