Plastics MCQ Questions and Answers for Practice

1. Which of the following is commonly used in schools for vacuum forming?

1. Melamine (MF)
2. HIPS
3. Polyester
4. PVC

2. Which process is used to manufacture plastic pipes?

1. Injection moulding
2. Extrusion moulding
3. Blow moulding
4. Vacuum forming

3. Which of the following characteristics does not affect the properties of plastics?

1. Their molecular structure
2. Their degree of polymerization
3. Both a. and b
4. None of the above

4. Thermosetting materials are

1. the plastics which can be softened even after they have set and hardened
2. the plastics which require heat and pressure to mould them into shape
3. both a. and b.
4. none of the above

5. Which plastic materials contain strong cross linkings in their molecular structure?

1. Thermoplastic materials
2. Thermosetting materials
3. Both a. and b.
4. None of the above

6. Which of the following is an example of thermoplastic material?

1. Camera bodies
2. Automobile parts
3. Electric plugs
4. Electric insulation

7. The process of combining two or more distinct polymer molecules to form a new product with different characteristics is called as

1. binding
2. stabilizing
3. filling
4. blending

8. Which plastic is used to laminate kitchen worktops?

1. Epoxy resin
2. Polyester (PET)
3. Melamine
4. PVC

9. Which of the following is used to manufacture carrier bags?

1. LDPE (Low Density PolyEthylene)
2. HDPE (High Density PolyEthylene)
3. Polycarbonate
4. PVC

10. Which of the following is used to make CDs?

1. PVC
2. PTFE
3. Polycarbonate
4. Polypropylene

11. Specific gravity of the plastics is usually

1. less than the specific gravity of metals
2. more than the specific gravity of metals
3. similar to the specific gravity of metals
4. Unpredictable

12. The materials such as lead and barium, which are added with polymers to minimize the effect of heat, sunlight and ozone are called as

1. binders
2. blenders
3. stabilisers
4. fillers

13. The plastics which soften when heat is applied with or without pressure, but requires cooling to set them to shape are called as

1. thermosofting materials
2. thermosetting materials
3. thermoplastic materials
4. thermostatting materials

14. Why are the plasticisers added with polymers?

1. To hold other constituents of plastic together
2. To reduce the cost and enhance the strength and hardness of plastics
3. To improve flexibility and to reduce the temperature and pressure required for moulding of plastics
4. None of the abov