Polymer Technology Cation exchange resins (0.3 to 1 mm size) used in water treatment is prepared from __________ resins. Melamine formaldehyde Phenol formaldehyde Urea formaldehyde Epoxy Melamine formaldehyde Phenol formaldehyde Urea formaldehyde Epoxy 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. Acrylic Nylon 6:6 Polypropylene Polyester Acrylic Nylon 6:6 Polypropylene Polyester ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Polymerisation of poly functional monomers produces polymers having Low viscosity Good machanical strength Low melting point None of these Low viscosity Good machanical strength Low melting point None of these ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Which of the following additives are added to plastics to make it impervious to X-rays? Barium salt Phthalic acid Carborundum Asbestos Barium salt Phthalic acid Carborundum Asbestos ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Fillers such as zinc oxide and carbon black are added to the crude natural rubber before vulcanisation in order to improve its Strength Elasticity Plasticity Weathering characteristics Strength Elasticity Plasticity Weathering characteristics ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology In a co-polymer, the repeating units contain two different monomers. Which of the following is a copolymer? Buna-S PTFE Polycaprolactum PMMA Buna-S PTFE Polycaprolactum PMMA ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS