Why aluminum alloy pistons need more clearance?(a) Free moment(b) Good fixture(c) Thermal expansion(d) Cold startI had been asked this question in quiz.The question is from IC Engine topic in portion Design of IC Engine Components of Automotive Engine Design

Why aluminum alloy pistons need more clearance?(a) Free moment(b) Good

1.	Why aluminum alloy pistons need more clearance?(a) Free moment(b) Good fixture(c) Thermal expansion(d) Cold startI had been asked this question in quiz.The question is from IC Engine topic in portion Design of IC Engine Components of Automotive Engine Design
Answer» The correct answer is (C) THERMAL expansion For EXPLANATION I WOULD say: The coefficient of thermal expansion of the aluminum piston is approximately twice that of cast iron piston. Hence, Aluminum alloy pistons NEED more clearance.

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Why aluminum alloy pistons need more clearance?(a) Free moment(b) Good fixture(c) Thermal expansion(d) Cold startI had been asked this question in quiz.The question is from IC Engine topic in portion Design of IC Engine Components of Automotive Engine Design

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