Polymer Technology Temperature and gage pressure maintained during the manufacture of hot SBR (styrene butediene rubber) are 250°C and 10 kgf/cm² 250°C and 1 kgf/cm² 50°C and 3 - 4 kg/cm² 50°C and 1 kgf/cm² 250°C and 10 kgf/cm² 250°C and 1 kgf/cm² 50°C and 3 - 4 kg/cm² 50°C and 1 kgf/cm² ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Low density polythene as compared to high density polythene is More flexible Harder Tougher Chemically inert More flexible Harder Tougher Chemically inert ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology 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. Rayon Polythene PVC Polyvinyl acetate Rayon Polythene PVC Polyvinyl acetate ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology 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? Nylon-6 Polythene Polyester Bakelite (phenol formaldehyde) Nylon-6 Polythene Polyester Bakelite (phenol formaldehyde) ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Lavatory cisterns are normally made of Saturated polyester Perspex PVC Expanded polystyrene Saturated polyester Perspex PVC Expanded polystyrene ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Addition polymerisation takes place either by a free radical mechanism or ionic machanism depending on the reagents used. Free radical polymerisation is catelyzed by __________ , which decompose to give free radicals. Hydroflouric acid Sulphuric acid Organic peroxides None of these Hydroflouric acid Sulphuric acid Organic peroxides None of these ANSWER DOWNLOAD EXAMIANS APP
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