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Quiz Leaderboard: 2/20 - 3/22/2017    Sign in to track your quiz score! | Full Leaderboard

  • 1. willem van Gent (22/23 answered correctly)

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  • 3. Juan I. Ordinas (22/23 answered correctly)

  • 4. Stephen Lipsham (22/23 answered correctly)

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Why must laitance and efflorescence be removed before coating concrete?

They are not well bonded to the sound concrete beneath them.
They affect the color of the coating.
Coatings are always incompatible with these materials.
They cause blistering.

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Previous Quizzes from the Past Week

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?

Thursday, July 19, 2012
When abrasive is recycled without sufficient new abrasive being added to the operating mix, what happens to the surface profile of steel being cleaned?


More previous quizzes
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