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 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
In a cross linked polymer, the monomeric units are linked together to constitute a three dimensional network. Which of the following is a cross-linked polymer?
A Bakelite (phenol formaldehyde)
B Polyester
C Polythene
D Nylon-6
Which of the following is not an addition polymer?
A Nylon
B PVC
C Polythene
D Polystyrene
A computer takes 50 nanoseconds to do an 221 addition. How many addition can it do in 1 second?
A 20 million
B 25 million
C 30 million
D 35 million
Size range of polymer molecules varies from __________ metre.
A 10-2 to 10-5
B 10-4 to 10-7
C 10-1 to 10-2
D 10-8 to 10-10
__________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate.
A Fibrous
B Leathery
C Rubbery
D Hard
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
Polymethyl methacrylate (PMMA) which is also known as perspex and is produced by bulk polymerisation of methyl methacrylate is not a __________ polymer.
A Thermoplastic
B Thermosetting
C Linear
D Glass like transparent
__________ is not a condensation polymer.
A Teflon
B Nylon-66
C Dacron
D Polystyrene

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