Polymer Technology Dacron (or terylene) fibres as compared to nylon fibres have Poorer dyeability Better heat & acid resistant properties All of these Poorer resistance to alkalis Poorer dyeability Better heat & acid resistant properties All of these Poorer resistance to alkalis ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Natural rubber is obtained from latex, which is a colloidal dispersion of rubber in water. Which of the following is used as a coagulant in latex? Potassium alum Neither A nor B Both A & B Ammonium alum Potassium alum Neither A nor B Both A & B Ammonium alum ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Commercial production of polypropylene employs __________ polymerisation. Emulsion Solution Suspension Bulk Emulsion Solution Suspension Bulk ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Perspex can be used as a substitute of glass. Its monomer is DMT Butadiene Methyl methacrylate Tetrafluroethylene DMT Butadiene Methyl methacrylate Tetrafluroethylene ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Peptizers like aromatic mercaptans (e.g. thiophenes) are added in rubber to Increase its viscosity Protect rubber goods from attack by oxygen & ozone present in the atmosphere Reduce its viscosity to permit easier processing Reduce the time of vulcanisation and quantity of vulcanising agent Increase its viscosity Protect rubber goods from attack by oxygen & ozone present in the atmosphere Reduce its viscosity to permit easier processing Reduce the time of vulcanisation and quantity of vulcanising agent ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology 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. Polypropylene Polyester Nylon 6:6 Acrylic Polypropylene Polyester Nylon 6:6 Acrylic ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS