What topics are covered on Page 3 of GATE 2026 Textile Engineering questions?

Page 3 contains Questions 27 to 39. Topics include fibrograms, oxidative desizing, dyeing auxiliaries, fibre chemical characterization, yarn characteristics, knitting loops, fibre bending rigidity, reactive-dye printing, PET drawing, ring spinning, knitted-fabric geometry, statistical textile testing and chemical add-on.

Which oxidising agent is used for desizing cotton fabric?

Hydrogen peroxide, H2O2, is the correct oxidising agent among the options given for oxidative desizing of cotton fabric.

Which technique provides information about the chemical structure of a fibre?

Infrared spectroscopy, or IR spectroscopy, provides information about the chemical structure and functional groups present in textile fibres.

What is the overall draw ratio of the PET filament in GATE 2026 Textile Engineering?

After 100 percent extension in the first drawing stage, 50 percent extension in the second stage and 10 percent shrinkage during heat setting, the overall draw ratio is 2.7.

How many cops are required for 1.5 kg of roving in the ring-spinning question?

For 450 tex roving drafted by 30 and 4 km of yarn wound on each cop, the required number of cops is 25.

What is the fire-retardant chemical add-on when wet pick-up is 90 percent?

For a 20 percent concentration of fire-retardant chemical and 90 percent wet pick-up, the chemical add-on after drying is 18 percent.

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Textile Engineering Gate 2026 Questions with Answer

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Ques 27 GATE 2026

Which one of the following graphs shows the typical Fibrogram for polyester staple fibres cut to equal length?

(d) is the correct answer.

Ques 28 GATE 2026

Amongst the following, the oxidising agent used for desizing of cotton fabric is _________.

H₂O₂

Na₂S₂O₄

HCl

NaOH

(a) is the correct answer.

Ques 29 GATE 2026

NaCl is used as a levelling agent for dyeing of _________________.

polyamide fibre with acid dye

cotton fibre with reactive dye

cotton fibre with direct dye

PET fibre with disperse dye

Ques 30 GATE 2026

Which one or more of the following techniques can provide information on the chemical structure of a fibre?

Differential Scanning Calorimetry (DSC)

Dynamic Mechanical Analysis (DMA)

Infrared (IR) Spectroscopy

Thermo-gravimetric Analysis (TGA)

Ques 31 GATE 2026

Which one or more of the following yarn characteristics is/are dimensionless?

Packing density

Twist multiplier

Twist contraction

Index of irregularity

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

Ques 32 GATE 2026

With reference to knitting, which of the following statements is/are correct?

A fabric with tuck loop is thinner than that with knit loop

A fabric with tuck loop is wider than that with knit loop

A fabric with tuck loop is thicker than that with knit loop

A fabric with tuck loop is narrower than that with knit loop

(b,c) is the correct answer.

Ques 33 GATE 2026

With reference to fibres with circular cross-section, which of the following statements is/are correct?

A finer fibre has higher bending rigidity than a coarser fibre

A finer fibre has lower bending rigidity than a coarser fibre

A finer fibre has higher specific surface area than a coarser fibre

A finer fibre has lower specific surface area than a coarser fibre

(b,c) is the correct answer.

Ques 34 GATE 2026

Which of the following thickening agents is/are used for direct style of printing of cotton fabric with a reactive dye?

Starch

Oil-in-water emulsion

Sodium alginate

British gum

Ques 35 GATE 2026

A PET filament is extended by 100 % in the first stage of drawing, then 50 % in the second stage of drawing, and subsequently allowed to shrink by 10 % during the heat-setting process. The ratio of final length to initial length (overall draw ratio) of the filament is _____________. (rounded off to one decimal place)

(2.7) is the correct answer.

Ques 36 GATE 2026

A ring spun yarn is prepared from a roving of 450 tex linear density and with a draft of 30 in ring frame. The length of yarn wound on each cop is 4 km. Considering no wastage, the number of cops needed to wind the yarn prepared from 1.5 kg of roving is _________________. (answer in integer)

(25) is the correct answer.

Ques 37 GATE 2026

In a knitted fabric, if the loop shape factor is 1.25 and the wales per cm is 10, then the courses per cm is _______________. (rounded off to one decimal place)

(12.5) is the correct answer.

Ques 38 GATE 2026

A sample of yarn bobbins is tested and the standard deviation of linear density is found to be 3 tex. If the nominal standard deviation of yarn linear density is 1.5 tex, then the calculated ‘F-value’ would be _____________. (answer in integer)

(4) is the correct answer.

Ques 39 GATE 2026

A PET fabric is dip-padded with 20 % (w/w) concentration of a fire retardant chemical. If the wet pick-up is 90 %, then the concentration (w/w) of the chemical on the fabric after drying (add-on) is _____________ %. (answer in integer)

(18) is the correct answer.

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