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GATE Textile and Fiber Science Set 2
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1. The fibre that contains nitrogen and sulfur is
Polyester
Wool
Nylon 6
Kevlar
2. Condensation polymerization is not used to produce
Polyester
Nylon 6
Nylon 66
Polypropylene
3. Wet spinning technique is commercially used to produce filament yarn of
Polypropylene
Polyester
Nylon 66
Acrylic
4. The fibre that dissolves in 59% (w/w) sulfuric acid solution is
Wool
Polypropylene
Cotton
Viscose
5. Surface features of a fibre can be obtained by
Transmission electron microscope
Scanning electron microscope
Small angle X-ray diffractometer
Sonic modulus tester
6. Birefringence of filament yarn is related to its
Crystallinity
Orientation
Individual filament denier
Density
7. A machine that does not improve the mass evenness is
Drawframe
Ring doubler
Speedframe
Ribbon lap
8. Fibre individualization in a card will increase by increasing
Licker-in to cylinder setting
Doffer speed
Licker-in speed
Cylinder speed
9. ofter cots on drafting rollers result in
An increase in drafting wave
Less fibre slippage at roller nip
Change in draft
Reduced roller lapping
10. Compared to the spinning of finer cotton yarns, the preferred rotor diameter for the production of very coarse cotton yarns would
Be higher
Be lower
Remain the same
Change depending on fibre strength
11. Increase in the ratio of the length of crank to the length of connecting rod leads to
Increase in sley eccentricity
Decrease in sley eccentricity
No change in sley eccentricity
Initial increase and then decrease in sley eccentricity
12. Shuttle remains on the race board during its flight in the shed because of
Forward positive acceleration of the sley.
Backward positive acceleration of the sley
Constant forward velocity
Constant backward velocity
13. In weft knitted fabrics of the same mass per unit area produced from the same yarns, the structure which will give the highest thickness is
Plain
Rib
Purl
Interlock
14. Amongst the following, the suitable technology for producing core spun yarn is
Air vortex spinning
Rotor spinning
Friction spinning
Air-jet spinning
15. Increase in taper angle on sectional warping drum will normally require
Higher warping speed
Lower warping speed
Increase in traverse speed
Decease in traverse speed
16. In weft knitted fabrics of the same mass per unit area produced from the same yarns, the structure which will give the highest thickness is
Plain
Rib
Purl
Interlock
17. The nonwoven process which has the highest production rate is
Needle punching
Hydroentangling
Melt blowing
Spunbonding
18. The highest washing fastness in a dyed cotton fabric would be obtained if the dye-fibre bond is
Ionic
Hydrogen
Covalent
Van der Waal's force
19. Disperse dye cannot generally be fixed on polyester by
Superheated steam at180o
Saturated steam at130oC
Dry heat at 200oC
Saturated steam at 100oC
20. Crease resist finishing of cotton fabric does not lead to
Reduction in tensile strength
Increase in dimensional stability
Increase in moisture regain
Increase in bending length
21. Two yarn samples have standard deviation of strength σ1 and σ2. If σ1 < σ2, the 'F' ratio would be
σ1 / σ2B.C. D.
σ2 / σ1
σ12 / σ22
σ22 / σ12
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