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Which among the following type of piston ring is used for worn-out cylinders?

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in Automotive Engine Design by (137k points)
Which among the following type of piston ring is used for worn-out cylinders?

(a) Delay action scraper ring

(b) Composite rail scraper ring

(c) Multi-piece oil control ring

(d) Carbo glide ring

I had been asked this question in an interview for internship.

The question is from Engine Components in section Basic Engine Components of Automotive Engine Design

1 Answer

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Best answer
Right choice is (b) Composite rail scraper ring

Explanation: The composite rail scraper ring is highly useful for worn-out cylinders having ovality or taper in the bores. Several steel rails are chrome plated and have rounded ends provide a smooth scraping action reducing wear of cylinder wall.

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