UNIT EIGHT - ANSWER EACH QUESTION
1.  Explainthe difference between coating and cladding
2. Describe the two main methods of painting: dipping and spraying(manual, automatic or electrostatic).
a) State the characteristic of each method.
b) Identify materials suitable for each method.
3. Describe the electroplating process.
a) List typical plating materials and give reasons for theiruse.
4. Explain the process of anodizing and state typicalapplications.
5. Classify vapour deposition processes into physical vapourdeposition (PVD) and chemical vapour deposition (CVD).
a) Describe the principle of each process.
b) Identify applications of each process.
6. Recognize the importance of thermal spraying.
a) Explain the principle of thermal spraying.
b) Identify typical thermal spraying processes according to thetechnology used to melt the coating material.:- oxyfuel flame,electric arc and plasma arc.
