Cellulose is the main constituent of most ______________ fibres?

Related Mcqs:

1. 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.

2. Cellulose content in bamboo fibre is about ______________ percent?

   A. 10
   B. 20
   C. 50
   D. 85

3. Scouring is a finishing operation during the manufacture of fibre, which aims at ______________ of fibres?

   A. Improving the stretchability
   B. Dyeing/colouring
   C. Detergent solution washing
   D. Glycol soaking

4. ______________ fibres are made of polyamides?

   A. Dacron
   B. Nylon
   C. Rayon
   D. Orion

5. Cellulose acetate has very high film permeability among all the polymers of the order of 5000 gm/100 m2. Which of the following polymers has the maximum film elongation (of the order of 100%) ?

   A. Water impermeable cellophane
   B. Polythene
   C. Cellulose acetate
   D. Teflon

6. In case of dry spinning of polymers, the polymer solution in a volatile solvent is forced through the spinnerates into a warm air chamber, where the solvent evaporates leaving behind the polymer in the filament form. Dry spinning is used for _______________ fibres?

   A. Polythene
   B. PVC
   C. Rayon
   D. Polyvinyl acetate

7. The synthetic fibres produced from _____________ are known as rayon?

   A. Lignin
   B. Cellulose
   C. Polyamides
   D. Ethylene glycol

8. Identify the group in which all the polymers mentioned can be used to make fibres ?

   A. Butadiene copolymers, Polyamides, Urea-formaldehyde
   B. Cellulose derivatives, Polyisoprene, Polyethylene
   C. Cellulose derivatives, Polyamides, Polyurethane
   D. Polypropylene, Poly vinyl chloride, Silicon

9. 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

10. In case of wet spinning of polymers, the polymer solution is forced through spinnerates into, a coagulating bath to give a filament form. Wet spinning is not used in case of the _____________ fibres?

    A. Viscose rayon
    B. Acrylic
    C. Polyvinyl acetate
    D. Saturated polyester