______________ fibres are made of polyamides?
______________ fibres are made of polyamides?
A. Dacron
B. Nylon
C. Rayon
D. Orion
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Which of the following polymers does not belong to the class of Polyacrylate polymer ?
Which of the following polymers does not belong to the class of Polyacrylate polymer ?A. PMMA
B. Polyacrylonitrile
C. Poly Ethyl acrylate
D. None of theseCollapsible tubes for tooth paste are produced by _____________ extrusion?
Collapsible tubes for tooth paste are produced by _____________ extrusion?A. Direct
B. Indirect
C. Impact
D. None of theseSynthetic polymer produced by using terephthalic acid and ethylene glycol is _________________?
Synthetic polymer produced by using terephthalic acid and ethylene glycol is _________________?A. Terylene
B. Nylon-66
C. PVC
D. PolystyreneTypical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is__________________?
Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is__________________?A. 7 kgf/cm2 and 70 °C
B. 1000 kgf/cm2 and 100°C
C. 7 kgf/cm2 and 700°C
D. 1 kgf/cm2 (gage) and 70°CMelt 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?
Melt sning of polymers involves the forcing of polymer melt through snerates (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 sning is not used in case of the _____________ fibres?A. Acrylic
B. Polyester
C. Nylon 6:6
D. PolypropylenePeptizers like aromatic mercaptans (e.g. thiophenes) are added in rubber to _________________?
Peptizers like aromatic mercaptans (e.g. thiophenes) are added in rubber to _________________?A. Protect rubber goods from attack by oxygen & ozone present in the atmosphere
B. Reduce its viscosity to permit easier processing
C. Reduce the time of vulcanisation and quantity of vulcanising agent
D. Increase its viscosity