Which of the following is NOT one of the listed blast-cleaning levels?

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Multiple Choice

Which of the following is NOT one of the listed blast-cleaning levels?

Explanation:
Blast cleaning levels describe how clean a metal surface is after abrasive blasting and before coating. White metal means the surface is free of rust, scale, oil, and grease. Near White Metal allows a tiny amount of residuals but remains very clean. Brush Off is a lighter level where most loose contaminants are removed, though a light film or dust may remain. Primer, by contrast, is a coating applied after the cleaning stage to improve adhesion and corrosion protection, not a blast-cleaning level. So primer is not one of the listed blast-cleaning levels.

Blast cleaning levels describe how clean a metal surface is after abrasive blasting and before coating. White metal means the surface is free of rust, scale, oil, and grease. Near White Metal allows a tiny amount of residuals but remains very clean. Brush Off is a lighter level where most loose contaminants are removed, though a light film or dust may remain. Primer, by contrast, is a coating applied after the cleaning stage to improve adhesion and corrosion protection, not a blast-cleaning level. So primer is not one of the listed blast-cleaning levels.

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