AG Mechanics CDE Practice Exam

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Prepare for the AG Mechanics CDE Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

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The exhaust valve is made of:

a composite alloy
a durable ceramic
a very special steel
common aluminum

The correct answer is: a composite alloy

The exhaust valve in an engine is typically made of a composite alloy to withstand the high temperatures and pressures generated during the combustion process. Composite alloys are known for their heat resistance and strength, making them an ideal material for the exhaust valve's demanding operating conditions. Options B, C, and D are incorrect because a durable ceramic, special steel, and common aluminum would not be able to withstand the extreme heat and stress experienced by the exhaust valve as effectively as a composite alloy.