A. Polysulphide rubber
B. Polyamide fibre
C. Engineering plastic
D. Expanded polystyrene
A. Thermoplastic
B. Thermosetting
C. Elastometric
D. Brittleness
A. High density polyethylene (HDPE)
B. Low density polyethylene (LDPE)
C. Polypropylene
D. Unsaturated polyester
A. PVC
B. Polythene
C. Bakelite
D. Polystyrene
A. Wet tear and bursting strength
B. Folding endurance
C. Wet rub resistance
D. All A., B. & C.
A. Densities
B. Melting point
C. Tensile strength
D. Hardness, rigidity & brittleness
A. Softness
B. Oxidation resistance
C. Weight & strength
D. Elasticity & water solubility