List of top Textile Engineering and Fibre Science Questions

A plain woven fabric with 20 ends per cm and 30 picks per cm is prepared with 30 tex warp yarns and 25 tex weft yarns. Neglecting yarn crimp, the areal density (g/m\(^2\)) of the fabric (in integer) is:
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) .................
If the twist multiplier in the indirect system is 4.8 tpi/Ne\(^{0.5}\), then the twist factor in the direct system (tpm tex\(^{0.5}\)) (rounded off to 2 decimal places) is ................
The area under the curve \( y = x^2 + 2x \) between \( x = 0 \) and \( x = 4 \), using the trapezoidal rule with a step size of one, (in integer) is .................
The Newton-Raphson method is being used for two iterations to find an approximate solution of the equation \( e^x - 1 = 0 \) with an initial guess of 1. The difference between the actual and approximate solutions (rounded off to 2 decimal places) is .................
For the same turns per unit length, as the yarn becomes coarser
Amongst the following weft knitted structures, double jersey structure(s) is/are
In flame retardant finishing of cotton fabric, the correct statement(s) is/are
If twist factor is same for a set of cotton yarns, then the yarns have the same:
In resist style of printing, the preferred arrangement for dyeing is:
Copolymers are present in
Amongst the following, hydrolytic desizing agents attack starch at:
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:
A drum-driven winder is fitted with a 3-diamond drum. The number of revolutions of the drum for single traverse is .................
The bonding process followed for production of highloft nonwoven is
In the amorphous phase, polymer chains prefer to be in a random coil conformation to
The spinning system that inserts false twist is
The amide linkage is NOT present in:
A polyester fabric of 150 cm width and areal density of 300 g/m\(^2\) is printed at a speed of 60 m/min. The solid content of the print paste is 50%. After printing and drying, the areal density of the printed fabric becomes 400 g/m\(^2\). The consumption (kg/h) of the print paste (in integer) is ________________.
The breaking load of a cotton yarn, with a twist multiplier of 4 tpi·Ne\(^ {-0.5} \), is 2.5 N. If the twist (number of turns per inch) of yarn is 20, then the tenacity (cN/tex) of the yarn (rounded off to 2 decimal places) is ______________.
For a wool fibre strand, the relationship between \( V_r \) (limit CV % of linear density) and \( N \) (average number of fibres in the cross-section of the strand) is given below. \[ V_r = \frac{112}{\sqrt{N}} \] For the above relationship, the CV % of linear density of wool fibre (rounded off to 2 decimal places) is ______________.
The twist angle (degree) of surface fibres in a yarn with density of 700 kg/m\(^3\) and twist multiplier of 6000 m\(^{-1}\).tex\(^{0.5}\) (rounded off to nearest integer), is ________________.
In a multiplicative type tensioner, the angle of wrap is 90° and the coefficient of friction between the yarn and the guide is 0.2. If the input yarn tension is 10 cN, then the output yarn tension (cN) is (rounded off to 1 decimal place) ______________.
A cotton fabric is dyed at 5% shade (owf) using a monofunctional reactive dye. The molecular weight of the dye and cellobiose unit is 400 and 342, respectively. If all the hydroxyl groups in cellulose are accessible for reaction, the percentage of unreacted hydroxyl groups of cellulose remaining after dyeing (rounded off to 2 decimal places) is ________________.
The tensile load (F) in Newton (N) and the elongation (e) in cm of a yarn are related as follows \[ F = 2e^2 + e \] If the breaking elongation of the yarn is 10 cm, then the work of rupture (N·m) of yarn (rounded off to 2 decimal places) is ________________.