A. Improving the stretchability
B. Dyeing/colouring
C. Detergent solution washing
D. Glycol soaking
Related Mcqs:
- Dacron (or Treylene) fibres as compared to nylon fibres have_____________________?
A. Better heat & acid resistant properties
B. Poorer resistance to alkalis
C. Poorer dyeability
D. All A., B. and C. - Cellulose content in bamboo fibre is about ______________ percent?
A. 10
B. 20
C. 50
D. 85 - Most of the fibre forming polymers are crystalline in nature, one of the exceptions being ______________ which is amorphous in nature?
A. Nylon
B. Polyacrylonitrile
C. Polypropylene
D. Polyester - Cellulose is the main constituent of most ______________ fibres?
A. Acrylic
B. Spandex
C. Synthetic
D. Natural - ______________ fibres are made of polyamides?
A. Dacron
B. Nylon
C. Rayon
D. Orion - Orlan fibre which is used as a wool substitute is __________________?
A. An amorphous polymer
B. A natural polymeric fibre
C. Polyacrylonitrile
D. Poly-methyl-methacrylate (PMMA) - Rayon is a ____________ fibre?
A. Cellulosic
B. Polyamide
C. Polyester
D. Natural - Polymers are classified into four categories namely thermosetting, thermoplastic, elastomer and fibre depending upon their________________?
A. Molecular sizes
B. Magnitude of intermolecular forces
C. Resistance to heat
D. Polymerisation mechanism
Answer: Option B - The synthetic fibres produced from _____________ are known as rayon?
A. Lignin
B. Cellulose
C. Polyamides
D. Ethylene glycol - Melt spinning of polymers involves the forcing of polymer melt through spinnerates (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the _____________ fibres?
A. Acrylic
B. Polyester
C. Nylon 6:6
D. Polypropylene
