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Which of the following is the main reason for a burnt piston?

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in Automotive Engine Design by (137k points)
Which of the following is the main reason for a burnt piston?

(a) Hot air intake

(b) Leak of coolant

(c) More clearance

(d) Detonation

This question was posed to me in an internship interview.

Asked question is from Engine Components topic in section Basic Engine Components of Automotive Engine Design

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The correct answer is (d) Detonation

The best I can explain: Burnt piston is chiefly on account of detonation or preignition. The burning due to detonation is generally at a point farthest from the spark plug where the hot end gases rapidly release their energy.

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