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Which material is coated on the piston to increase the service life?(a) Tin(b) Zinc(c) Lead(d) CadmiumThis question was addressed to me in an interview.The origin of the question is Engine Components in chapter Basic Engine Components of Automotive Engine Design

Answer»

The correct answer is (a) Tin

The best I can explain: PISTON is generally COATED with tin plating to reduce the POSSIBILITY of scoring. This even helps the piston in increased the service life of the engine piston. Tin PLATED surface treatment is ANTIOXIDANT and tarnish resistant.



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