Related Questions

Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (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
In the manufacture of viscose rayon, the raw material used industrially is
A Recalyptious wood
B Bamboo
C Bagasse
D Fine teak wood
Viscose rayon is
A Cellulose nitrate
B Regenerated cellulose nitrate
C Regenerated cellulose acetate
D None of these
Viscose rayon is chemically
A Cellulose nitrate
B Regenerated cellulose nitrate
C Cellulose acetate
D Regenerated cellulose acetate
Rayon is superior to cotton in making gauge for wound treatment, because rayon
A Is a synthetic polymer
B Does not stick to the wound unlike cotton
C Can absorb over 90% of its own weight of water
D Both B & C
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
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
COTTON: RAYON
A Sheets : Dresses
B Syntheric : Natural
C Natural : Synthetic
D Summer : Winter
Select the pair that best expresses a relationship similar to that in the original pair. COTTON: RAYON
A Summer : Winter
B Win : Defeat
C Natural : Synthetic
D Gin : Laboratory
Rayon is obtained from which among the following?
A Silk
B Wood pulp
C Wool
D Cotton

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