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Daily Quiz (20)


What is the name of the industrial form of hydrochloric acid that is used to clean concrete and masonry?


True or False? Some historic preservationists might object to the use of a clear, penetrating sealer on the masonry walls of an historic structure.


Why are elastomeric acrylics often selected for use on masonry walls?


True or false: Preservationists prefer penetrating sealers over coatings to protect masonry substrates on historic structures.


True or false: Film-forming coating systems on exterior masonry or concrete walls should not have any moisture vapor permeability.


Penetrating sealers are sometimes avoided by conservators on the masonry substrates of historic structures for what main reason?


Mineral paints used on masonry substrates use what type of binders?


True or false: The less permeable a coating for exterior masonry is, the more durable it is likely to be.


Which of the following product types is a water-repellant for masonry and concrete that penetrates pores, is breathable, and does not change the appearance of the substrate to which it is applied?


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.


True or false: Non-film-forming coatings used as sealers on concrete and masonry cannot be pigmented to alter the appearance properties of substrates.


True or false: A coating system on an exterior concrete block wall must provide protection from wind-driven rain and, if moisture vapor diffuses from inside to outside, be sufficiently permeable to allow vapor to exit the wall.


True or false: Preservationists always prefer penetrating sealers over coatings on masonry substrates in work to preserve historic structures.


True or false: Clear, non-film forming masonry sealers, such as silanes and siloxanes, have little effect on vapor permeability, thereby allowing water vapor to exit the masonry substrate.


A crust of soluble salts, commonly white, deposited on the exterior of masonry facades, such as brick, is called what?


Why are clear, 100% acrylics often used on masonry facades?


True or false: Clear film-forming coatings do not typically change the appearance of masonry.


True or false: One hundred percent acrylic coatings are relatively resistant to alkaline substrates such as masonry.


True or false: Clear penetrating water repellents typically have a large influence on the vapor permeance of a masonry substrate.


True or false: Film-forming coating systems on exterior masonry or concrete walls should exhibit water vapor permeability or breathability.


 
 
   

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Dow Polyurethane Systems
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The Finest Name in Safe Overspray Removal. We specialize in removing all contaminants from any surface. Family Owned and Operated for 33 years! Fully insured. Satisfaction is guaranteed.


U.S. Zinc
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KTA Online
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Graco Inc.
Graco M680 Mortar Pump

Compact and portable. Great for concrete resurfacing and repairs. Handles mortars, cementitious and filled materials.
Call 877-844-7226 or info@graco.com.


Harsco
BLACK BEAUTY® App

Download the free app for BLACK BEAUTY® Abrasives. Explore all the features from the palm of your hand.
Toll Free: 1-888-733-3646


Dampney Co., Inc.
Temperature Indicating Paint/Coating

protective coating that provide a visual warning that a pipe, vessel, reactor, transfer line, and similar equipment is overheating due to failure of refractory linings or the bypassing of hot gasses.


Ethox Chemicals LLC
Ethoflex® ER instantly upgrades your epoxy!

The only epoxy additive that improves flexibility, corrosion resistance, toughness, and adhesion, without hurting pot life, cure time, or increasing VOCs.


Clemco Industries Corp.
Global engineering-trusted solutions

For more than 70 years, Clemco has provided the highest quality blast equipment with a total commitment to comfort and safety.

 
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