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In air abrasive blasting, why is it sometimes useful to adjust the angle of attack (angle of the nozzle in relation to the workpiece)?

To reduce fatigue
To achieve maximum productivity in the removal of different materials, such as paint and mill scale
To avoid arcing the nozzle
To assure a consistent stand-off distance

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Previous Quizzes from the Past Week

Thursday, July 26, 2012
Why must laitance and efflorescence be removed before coating concrete?

Wednesday, July 25, 2012
In its Technology Guide on the subject, what type of coating material does SSPC recommend for repairing imperfections in galvanized, organic zinc-, or inorganic zinc-coated steel?

Tuesday, July 24, 2012
What is the leading cause of pipeline failures in North America and Europe?

Sunday, July 22, 2012
True or false: There are no quantitative methods for determining levels of moisture in concrete floor slabs.

Friday, July 20, 2012
What is the main purpose of optically active pigmentation in coatings?


More previous quizzes
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