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Daily Quiz (90)

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True or false: There is a quantitative test method for measuring surface profile of concrete.

Thursday, April 10, 2014


What organization provides education and certification of concrete slab moisture testing technicians?

Wednesday, April 9, 2014


Most coatings applied to concrete substrates provide what type of protection?

Tuesday, April 1, 2014


True or false: By matching both the color of the matrix and the aggregates in a concrete substrate, repair materials can be created that will match the appearance of the original substrate.

Monday, January 20, 2014


True or false: The ASTM Plastic Sheet Method (D 4263) for detecting moisture in concrete substrates can be used both on concrete floor slabs and on vertical walls.

Monday, January 13, 2014


True or False: Like their counterparts for steel, there are four SSPC surface preparation standards describing the end condition of concrete after cleaning.

Tuesday, December 10, 2013


True or False: The plastic sheet method is a quantitative test for determining the extent of moisture in a concrete slab.

Monday, October 14, 2013


What organization created and sells rubber replica templates for determining the surface profile of concrete?

Friday, October 11, 2013


What does the anhydrous calcium chloride test measure?

Wednesday, October 2, 2013


What is a name sometimes given to the creation of microcracks in a concrete surface through use of impact, pulverizing, or other mechanical surface preparation methods?

Tuesday, September 24, 2013


Uncured concrete is often associated with what color?

Wednesday, September 18, 2013


True or False? ASTM D7234, “Standard Test Method for Pull-Off Adhesion Strength of Coatings on Concrete Using Portable Pull-Off Adhesion Testers,” can also be used to measure the surface strength of uncoated concrete.

Friday, August 9, 2013


Which abrasive type is most likely to be used in a portable wheel blast machine for surface preparation of concrete floors?

Tuesday, July 23, 2013


True or false: Lithium silicate can be used to densify concrete.

Tuesday, May 7, 2013


True or false: Opaque stains produce color on a concrete floor by reacting chemically with the concrete.

Wednesday, February 13, 2013


What organization does not produce standards for the surface preparation of concrete?

Thursday, February 7, 2013


True or false: The standard for non-destructive measurement of dry coating film thickness on concrete is different from the one used to measure dry coating film thickness on steel.

Monday, February 4, 2013


What is the name of the thin, weak surface layer that can form on newly placed and finished concrete?

Wednesday, January 30, 2013


What organization has a standard for the surface preparation of concrete?

Wednesday, January 23, 2013


True or false: Rubber replica templates from the American Concrete Institute can be used to judge the degree of surface profile on concrete.

Monday, January 21, 2013


What is the alphanumeric designation of the SSPC Paint Application Standard for measuring the thickness of dry coatings on concrete?

Wednesday, January 16, 2013


True or false: Some coatings can act as carbonation barriers on concrete.

Monday, January 14, 2013


True or false: A broom finish produces a coarse to very coarse finish on concrete.

Thursday, January 3, 2013


What kind of concrete sealers penetrate the pores of the concrete and form little if any film build?

Wednesday, December 12, 2012


True or false: Acid etching does not produce a surface profile on concrete.

Monday, December 10, 2012


What is bruising of concrete?

Monday, December 10, 2012


True or false: A new concrete surface finished with a power trowel would tend to have high porosity.

Thursday, December 6, 2012


Why are zinc-rich coatings sometimes applied to structural concrete?

Tuesday, December 4, 2012


Which of the following is an environmentally benign material sometimes used to etch concrete before application of coatings?

Tuesday, November 13, 2012


What characteristic of concrete allows uncoated steel rebar within a slab to be protected from corrosion?

Monday, October 29, 2012


What is the name of the concrete removal technique that employs water?

Monday, October 22, 2012


What organization provides visual profile standards for concrete?

Friday, October 12, 2012


What chemistry type is used to create sealers that penetrate and line the pores of concrete?

Tuesday, October 9, 2012


What is the conventional wisdom on the length of time concrete should cure before it is coated?

Friday, October 5, 2012


According to SSPC's Surface Preparation Commentary for Steel and Concrete Substrates (SSPC-SP COM), final dry blast cleaning should not be conducted when the steel surface is less than how many Fahrenheit degrees above the dew point?

Thursday, September 27, 2012


What is the name of a thin, weak layer of aggregate fines and unreacted constituents at the surface of recently poured concrete?

Tuesday, August 21, 2012


The rebound hammer, used to test the compressive strength of concrete, also has another name, the last name of the inventor of the device. What is the name?

Thursday, August 9, 2012


What organization recently issued a standard for measuring the profile of concrete after surface preparation?

Tuesday, July 31, 2012


Why must laitance and efflorescence be removed before coating concrete?

Thursday, July 26, 2012


What organization has presented Concrete Coatings Conferences at the World of Concrete show?

Wednesday, July 25, 2012


True or false: There are no quantitative methods for determining levels of moisture in concrete floor slabs.

Sunday, July 22, 2012


True or false: The anhydrous calcium chloride test for measuring moisture in concrete slabs is a qualitative rather than a quantitative test.

Monday, July 9, 2012


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

Wednesday, June 13, 2012


True or false: There is no quantifiable method for determining the surface profile on concrete substrates.

Friday, June 8, 2012


While a concrete surface needs to be clean prior to application of a silane or siloxane sealer, it does not require substantial roughening or profiling. Why?

Tuesday, June 5, 2012


ACI 301 requires how much concrete thickness to be poured over reinforcing steel?

Friday, May 25, 2012


What effect does the high alkalinity of concrete have on corrosion of rebar within the concrete?

Thursday, March 29, 2012


True or false: The addition of pigments is required to match the color of concrete repair materials with the color of the concrete matrix being repaired.

Thursday, March 29, 2012


True or false: The density of concrete prevents water vapor and gases from moving freely within the matrix.

Monday, January 30, 2012


True or false: One cause of rebar corrosion in concrete is carbonation of the concrete surrounding the rebar.

Tuesday, January 24, 2012


What organization hosts the annual Concrete Décor Show?

Monday, January 9, 2012


When acid etching is used to create a profile on concrete in preparation for painting, why is it important to rinse the concrete thoroughly after the etching is completed?

Wednesday, January 4, 2012


True or false: All sealers for concrete substrates form a thin film on the surface of the concrete.

Thursday, December 22, 2011


True or false: The most accurate meters for detecting moisture within a concrete substrate are based on readings of temperature and humidity.

Tuesday, December 20, 2011


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?

Wednesday, November 16, 2011


What is the main reason for backrolling a concrete masonry substrate after the initial paint application by spray?

Tuesday, November 15, 2011


What is “green” concrete, when the term “green” does not refer to a positive environmental impact?

Wednesday, September 28, 2011


Why would a test for moisture content of concrete be important prior to application of thick-film elastomeric coatings?

Thursday, September 15, 2011


Why is back rolling often required following airless spraying of coatings over concrete blocks (CMUs)?

Tuesday, August 2, 2011


True or false: ASTM has separate test methods for steel and concrete substrates in determining the pull off adhesion of coatings.

Friday, July 22, 2011


True or false: Water beading on a new concrete floor indicates it is ready for application of a chemically reactive stain.

Monday, July 18, 2011


Corrosion of rebar is likely to cause which of the following conditions in concrete?

Friday, June 24, 2011


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

Wednesday, June 22, 2011


What is the conventional wisdom about the amount of time required for concrete to cure before it can be coated?

Thursday, June 9, 2011


True or false: Novolac epoxies and polymer concretes are sometimes selected as flooring systems over concrete for resistance to chemicals.

Tuesday, May 31, 2011


Which of the following surface preparation methods for concrete produces the largest surface profile?

Monday, May 9, 2011


ICRI recommends how much surface profile in its surface preparation requirements for polymer overlays on concrete?

Monday, May 9, 2011


True or false: Elastomeric coatings are generally able to bridge minor cracks in concrete.

Thursday, April 21, 2011


Which of the following coating types is used as a non-film-forming sealer for concrete substrates?

Thursday, April 14, 2011


What organization produces standards for the surface preparation of concrete?

Wednesday, April 13, 2011


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.

Monday, April 4, 2011


True or false: Silane and siloxane sealers prevent both water ingress into concrete and moisture vapor from escaping the concrete.

Tuesday, March 15, 2011


True or false: Non-film-forming sealers, such as siloxanes, allow moisture to escape from within concrete substrates.

Thursday, March 3, 2011


True or false: Rubber replica templates from the American Concrete Institute can be used to judge the degree of profile on concrete substrates after surface preparation.

Monday, February 28, 2011


True or false: Siloxane sealers are typically applied at 1-2 mils dry film thickness on concrete substrates.

Thursday, February 24, 2011


Hydrophobic contaminants on concrete may include what types of materials?

Monday, February 21, 2011


Which of the following terms is out of place in the list?

Tuesday, February 8, 2011


What is the usual name given to the type of crack that occurs in fresh concrete soon after it is placed?

Tuesday, January 25, 2011


True or false: A dry-shake material can be spread over fresh concrete and "floated in" to color the surface.

Monday, December 20, 2010


What is the name of the surface imperfection in a concrete wall that occurs when cement paste finds its way into gaps between forms.

Thursday, December 16, 2010


Which of the following is a common contaminant on an exterior concrete wall that should be removed before coating?

Wednesday, December 15, 2010


What is the main reason why zinc coatings are sometimes applied to structural concrete?

Monday, December 13, 2010


True or false: Concrete should be roughened to produce a profile before application of a silane or siloxane sealer.

Friday, December 3, 2010


A portable centrifugal wheel blast machine uses what kind of abrasive to clean and profile concrete floors?

Thursday, November 11, 2010


True or false: Citric acid is sometimes used to etch concrete before a coating is applied.

Wednesday, October 13, 2010


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

Friday, October 1, 2010


What is the main reason that alkyds generally are not specified for concrete surfaces?

Friday, September 24, 2010


Common surface imperfections, as opposed to contaminants, in newly placed concrete that deserve attention in surface preparation operations include all but which one of the following?

Friday, September 10, 2010


Adding color to concrete can be achieved through use of:

Wednesday, September 8, 2010


What is the main reason thermal spray zinc is sometimes used on concrete substrates?

Thursday, September 2, 2010


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