1) Plastics are materials formed by chains of a) carbon and hydrogen b) hydrogen and oxygen c) nitrogen and oxygen d) carbon and oxygen 2) How many years does it take for a plastic bottel to decompose? a) 50 b) 100 c) 500 d) 150 3) What are the three different types of plastics a) Thermoplastic, PVC and Teflon b) Thermoset, PVC and elastomer c) Thermoplastic, Thermoset and Elastomer 4) Plastic bottles can be made of PET and Polyethylene a) True b) False 5) What type of thermoplastic is used in pipes, cable insulation and profiles for doors and windows? a) PVC b) Teflon c) Polycarbonate d) Polystyrene 6) What type of plastic is it is used to coat frying pans and other kitchen utensils? a) Polystyrene b) Teflon c) Polyethylene d) PET 7) This type of plastic can be shaped using heat; however, they cannot be re-melted to create different forms a) Thermoset b) Thermoplastic 8) What are the different types of Thermoset plastics seen in class? a) PVC, PET and Teflon b) Melamine, Bakelite and Polyester resins c) Melamine, Neoprene and Rubber d) Bakelite, PVC and Polyethylene 9) Rubber bands, tyres, gloves, hose ... are examples of a) Thermoset b) Thermoplastics c) Elastomers 10) A plastic bag is made of  a) PVC b) Polypropylene c) Polyethylene d) Polyester resin 11) Hoses are made of a) Rubber b) Polyethylene c) Polypropylene

Plastics

打印
嵌入

排行榜

视觉风格

选项

切换模板

恢复自动保存：？