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.Management Sciences
Category: Polymer Technology
Pick out the wrong statement?
A. Denier is defined as weight in gm of 9000 metres length of a fibre, while tex is defined as weight in gm of 1000 metres length of fibre
B. Crimp is a measure of the difference between the length of the straightened and unstraightened fibre
C. Dacron fibres, acrylic fibres, viscose rayon fibres & cellulose acetate fibres are all prepared by wet spinning
D. Nylon fibres have greater water absorption capacity than polyester fibres
The major component of acrylic fibers is__________________?
A. Polyamides
B. Polyolefins
C. Polyacrylonitrile
D. Polyesters
Polyhexamethylene adipamide is also known as______________?
A. Bakelite
B. Nylon-66
C. Epoxy resin
D. Silicone rubber
The conversion of caprolactam in the above case is about ____________ percent?
A. 25
B. 50
C. 70
D. 90
Ebonite is a/an___________________?
A. Highly vulcanised rubber
B. Natural rubber
C. Unvulcanised raw rubber
D. Adhesive
______________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine?
A. Epoxy
B. Amino
C. Alkyd
D. Phenolic
Polyvinyl acetate is never used for making_________________?
A. Moulded articles
B. Fibres
C. Adhesives
D. All A., B. & C.
Nylon-6 is manufactured from _______________?
A. Caprolactam
B. Adipic acid and Hexamethylenediamine
C. Maleic anhydride and Hexamethylenediamine
D. Sebacic acid and Hexamethylenediamine
Phenol formaldehyde is produced by condensation polymerisation. It is also known as_________________?
A. Teflon
B. Bakelite
C. Polyester
D. Nylon-66
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