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Daily Quiz (7)


True or false: Ultra-high-pressure water jetting at 30,000 psi typically produces a greater volume of water in removing coatings from a masonry substrate than does pressure washing at 5,000 psi.


True or false: According to a recent JPCL article, planing is more effective than shotblasting in removing asphalt, latex, adhesives and other materials that are thicker than 2 mm from concrete floors.


Why is crystalline silica sand more likely to cause silicosis when it is used for abrasive blasting, as opposed to when it blows around on a beach?


What is the typical pressure range for water jetting when it is used to remove coatings and corrosion from structural steel?


True or false: Ultra-high-pressure water jetting at 30,000 psi typically produces a lower volume of water in removing coatings from a masonry substrate than does pressure washing at 5,000 psi.


To totally remove coatings from brick and at the same time to minimize substrate damage and avoid generation of airborne dust, which of the following surface preparation methods makes the most sense?


True or false: In preservation work on historic structures, abrasive blasting is normally recommended by conservators for coating removal from brick substrates.


 
 
   

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