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Tech A says that Ra is critical in the machining process to ensure head gasket sealing. Tech B says that a Ra rating of 0–1 is the best sealing surface. Who is correct?
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Tech A says that Ra is critical in the machining process to ensure head gasket sealing. Tech B says that a Ra rating of 0–1 is the best sealing surface. Who is correct?

User Doldt
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Final answer:

Tech B is correct that a Ra rating of 0–1 is the best sealing surface in the machining process for head gasket sealing.

Step-by-step explanation:

Tech B is correct that a Ra rating of 0–1 is the best sealing surface in the machining process for head gasket sealing.



Ra stands for Roughness Average, which is a measure of the surface roughness of a machined part. In the context of head gasket sealing, a low Ra rating indicates a smoother surface, which enhances the effectiveness of the seal. A Ra rating of 0–1 means that the surface is very smooth, providing a tight seal.



On the other hand, a higher Ra rating suggests a rougher surface, which can compromise the seal and lead to leakage.

User Tanaya
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