S1 PMW - Finishing

What is the primary purpose of applying a plastic coating to ferrous metals?

• To enhance the metal's appearance

• To prevent rusting

• To increase the metal's weight

• To make the metal more flexible

What is the name of the tank used in the plastic dip coating process?

• Mixer

• Fluidiser

• Reactor

• Blender

What is the first step in the plastic coating process?

• Heat the metal to 180°C

• Dip the metal into the fluidised plastics powder

• Thoroughly clean and degrease the metal

• Return it to the oven to fuse the coating

What happens to the powdered plastic when air passes through it in the fluidiser?

• It solidifies

• It behaves like a liquid

• It evaporates

• It changes colour

What is the final step in the plastic coating process?

• Heat the metal to 180°C

• Dip the metal into the fluidised plastics powder

• Return it to the oven to fuse the coating

• Leave it to cool

Which of the following items is NOT mentioned as being commonly coated with plastic?

• Wire metal baskets

• Racks

• Handles for tools

• Metal pipes