Choose the correct answer for each question.

1. Which process is suitable for finishing plastic?

   1.   ?    Polishing
   2.   ?    Electroplating
   3.   ?    Galvanising
   4.   ?    Plastic dip coating

2. What is not an effect produced by dip coating a mild steel product?

   1.   ?    Improves appearance.
   2.   ?    Makes it harder.
   3.   ?    Stops rusting
   4.   ?    Covers rough edges.

3. What is the purpose of primer when painting metal?

   1.   ?    Cleans the surface
   2.   ?    Creates a smooth surface.
   3.   ?    Adheres (sticks) to the metal surface
   4.   ?    Stops rust

4. Which of these metals rusts?

   1.   ?    Stainless steel
   2.   ?    Carbon steels (mild steel and tool steels)
   3.   ?    Aluminium
   4.   ?    Brass

5. What stops aluminium from corroding?

   1.   ?    It is unaffected by moisture and oxugen.
   2.   ?    A thin layer of oxide prevents further attack.
   3.   ?    It is always covered in a thin layer of oil
   4.   ?    Pure aluminium corrodes but aluminium alloys do not

6. Which of the following is not used tp electroplate mild steel?

   1.   ?    Nickel
   2.   ?    Chromium
   3.   ?    Copper
   4.   ?    Brass

7. Which of these metals can be effectively anodised?

   1.   ?    Copper
   2.   ?    Mild steel
   3.   ?    Aluminium
   4.   ?    Brass