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PART ட்‌

Answer any four full questions, each carries 10 marks.
What is adhesion and adhesive index?
Write short notes on adhesive coefficient of friction?
Explain adhesion produced by surface tension.
Differentiate ball bearing and roller bearings.
Write any four bearing materials used in industry.
Write any two applications of roller bearings.
Differentiate between sliding and rolling contact bearings.
Describe Chemical Vapour Deposition with a neat sketch.
Explain any three geometrical parameters of coating.
What is transformation hardening?
What is electro plating?

Explain thermo chemical treatments.

Write any three advantages and disadvantages of electro plating method.

Explain Surface melting.
Write any four characteristics of electro less plating.

What are the different properties and parameters of coating?

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