Metal and Plastic Finishes
Multiple-choice exercise
Choose the correct answer for each question.
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Which process is suitable for finishing plastic?
- Polishing
- Electroplating
- Galvanising
- Plastic dip coating
What is not an effect produced by dip coating a mild steel product?
- Improves appearance.
- Makes it harder.
- Stops rusting
- Covers rough edges.
What is the purpose of primer when painting metal?
- Cleans the surface
- Creates a smooth surface.
- Adheres (sticks) to the metal surface
- Stops rust
Which of these metals rusts?
- Stainless steel
- Carbon steels (mild steel and tool steels)
- Aluminium
- Brass
What stops aluminium from corroding?
- It is unaffected by moisture and oxugen.
- A thin layer of oxide prevents further attack.
- It is always covered in a thin layer of oil
- Pure aluminium corrodes but aluminium alloys do not
Which of the following is not used tp electroplate mild steel?
- Nickel
- Chromium
- Copper
- Brass
Which of these metals can be effectively anodised?
- Copper
- Mild steel
- Aluminium
- Brass