Polymers and Commercial Processes Quiz

What is a polymer?

• A small molecule formed from many identical smaller molecules

• A large molecule formed from different smaller molecules

• A small molecule formed from different smaller molecules

• A large molecule formed from many identical smaller molecules

What is the primary source for most polymers?

• Renewable crude oil

• Non-renewable crude oil

• Natural gas

• Recycled plastics

What is injection moulding?

• A process where solid material is cut into shapes

• A process where material is compressed into a mould

• A process where molten material is forced into a mould

• A process where molten material is poured into a mould

What is the role of the hydraulic ram in injection moulding?

• To ensure just enough material is injected into the mould

• To heat the polymer

• To cool the mould

• To remove the moulded plastic

What is extrusion?

• A process where material is compressed into a shape

• A process where material is poured into a mould

• A process where material is pushed through a die to form a shape

• A process where material is cut into a shape

Which of the following is a common extruded polymer product?

• Plastic bags

• Plastic toys

• Plastic pipes

• Plastic bottles

What is the function of an Archimedean screw in these processes?

• To move the polymer along a heated tube

• To cut the polymer into pieces

• To cool the polymer

• To heat the polymer

What is the main environmental concern with polymers?

• They are not strong enough

• They are difficult to dispose of

• They are too expensive to produce

• They are too heavy

What is the melting point characteristic of polymers?

• Variable melting point

• Low melting point

• High melting point

• No melting point

What is the purpose of a die in the extrusion process?

• To inject the polymer into a mould

• To form the shape of the extrusion

• To cool the polymer

• To heat the polymer