Textile Engineering Gate 2023 Questions with Answer
Ques 27 GATE 2023
In a guarded hot plate, the dimension of the square test plate is 15 cm × 15 cm. Keeping the temperatures of the test plate and the air at 35oC and 20oC respectively, the power losses from the test plate with and without fabric specimen are 16 W and 40 W, respectively. The intrinsic transmittance [W/(m²K)] of the fabric (rounded off to 2 decimal places) is _______.
Ques 28 GATE 2023
The amide linkage is NOT present in _______.
Ques 29 GATE 2023
In the amorphous phase, polymer chains prefer to be in a random coil conformation to _______.
Ques 30 GATE 2023
Copolymers are present in _______.
Ques 31 GATE 2023
Determine the correctness or otherwise of the following Assertion [a] and Reason [r].
[a]: In boiling water, polyester POY shows higher shrinkage than polyester FDY
[r]: Molecular chain orientation is higher in polyester FDY than in polyester POY
Ques 32 GATE 2023
Amongst the following weft knitted structures, double jersey structure(s) is/are _______.
Ques 33 GATE 2023
In warp knitting, the lapping movement having only under-lap is _______.
Ques 34 GATE 2023
A circular knitting machine of 26 inch diameter and 20 gauge with 120 feeders is running at 30 rpm to produce a plain knitted fabric by using 30 tex yarn. If the loop length is 3 mm, then the rate of production (kg/h) of the machine (rounded off to 1 decimal place) is _______.
Ques 35 GATE 2023
A PET sample with 40% crystallinity shows only a melting endotherm in the first heating cycle of DSC with a melting enthalpy of 50 J/g. The degree of crystallinity (%) of another PET sample which also shows only a melting endotherm but with a melting enthalpy of 80 J/g is _______ (in integer).
Ques 36 GATE 2023
During the measurement of cotton fibre fineness (micronaire) by air flow method, a higher quantity of cotton fibre is taken by mistake than specified. The reading of micronaire value from the instrument will be _______.
Ques 37 GATE 2023
The bonding process followed for production of highloft nonwoven is _______.
Ques 38 GATE 2023
Consider the following statements regarding Nylon 6 production from caprolactam using water as a catalyst.
P. The first reaction involving ring-opening of caprolactam with water is an
endothermic reaction
Q. Increase in water concentration during the polycondensation results in
a higher molecular weight polymer
R. The polycondensation is an irreversible reaction
S. Increase in temperature during the polycondensation results in a lower
molecular weight polymer
The correct combination of TRUE statements is
Ques 39 GATE 2023
Three monodisperse Nylon 6 samples with molar masses 10000 g/mol, 30000 g/mol and 60000 g/mol are mixed in a proportion of 1:1:2 by number of chains. The polydispersity index of the resulting sample (rounded off to 2 decimal places) is _______.
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