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AVM Powerplant Practice Test

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Which marking material is used to identify turbine engine components exposed to high temperatures?
Correct Answer:
Layout dye
Explanation:
When identifying parts that see high temperatures, the marking material must stand up to heat and maintain readability. Layout dye is designed to adhere to metal surfaces and endure the elevated temperatures found in hot engine areas, so the marks stay visible during assembly and operation. Grease or wax pencils melt or smear in heat, making them unreliable for hot sections. A layout pencil isn’t built for heat resistance and can wipe away. Graphite marks can oxidize or fade under high temperatures and in oily environments, reducing legibility. So for identifying turbine engine components exposed to high temperatures, layout dye is the best choice.

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