Polymer Technology Plastic articles are normally produced by __________ moulding. Injection Shell Green sand Dry sand Injection Shell Green sand Dry sand ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology __________ are produced by reacting polybasic acid (e.g. phthalic anhydride) with polyhydric alcohol (e.g., glycerol). Unsaturated polyester Amino resins Saturated polyester Alkyd resins Unsaturated polyester Amino resins Saturated polyester Alkyd resins 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 Ammonium alum Both A & B Potassium alum Neither A nor B Ammonium alum Both A & B ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher Hardness, rigidity & brittleness Tensile strength Densities Melting point Hardness, rigidity & brittleness Tensile strength Densities Melting point ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Thermocole (expanded polystyrene) is not used for Packing of delicate electronic gadgets Accoustic control and ceiling for building High temperature thermal insulation in furnaces Low temperature thermal insulation as in refrigerator and air conditioners Packing of delicate electronic gadgets Accoustic control and ceiling for building High temperature thermal insulation in furnaces Low temperature thermal insulation as in refrigerator and air conditioners ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Cation exchange resins (0.3 to 1 mm size) used in water treatment is prepared from __________ resins. Epoxy Phenol formaldehyde Urea formaldehyde Melamine formaldehyde Epoxy Phenol formaldehyde Urea formaldehyde Melamine formaldehyde ANSWER DOWNLOAD EXAMIANS APP
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