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Which material is used in piston pin bearing?

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in Automotive Engine Design by (137k points)
Which material is used in piston pin bearing?

(a) Nickel-chromium

(b) Silver

(c) Iron

(d) Phosphor bronze

I got this question in a national level competition.

Question is taken from IC Engine in chapter Design of IC Engine Components of Automotive Engine Design

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Right choice is (d) Phosphor bronze

Easiest explanation: The piston pin bearing is usually a phosphor bronze of 3 mm thickness and it is an alloy of copper; it has good strength and corrosion resistance.

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