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Daily Quiz (27)


Which of the following coating adhesion tests is the least quantitative?


True or false: An adhesive failure of a coating layer occurs at the bottom of the layer; a cohesive failure occurs at the top of the layer.


What is another name for a dolly used in coating testing?


What is the acronym for an instrument used to conduct the ASTM 4541 test, Standard Test Method for Pull-Off Strength of Coatings Using Portable Adhesion Testers?


Which of the following coating adhesion tests is the least quantitative?


True or false: It is better to use a pull stub than a dolly on pull-off adhesion testing.


True or false: The ASTM test method for determining the pull-off strength of coatings using portable adhesion testers is applicable to both steel and concrete substrates.


Which of the following coating adhesion tests is the least quantitative?


True or false: ASTM has a quantitative test method for evaluating the adhesion of a coating by cutting and probing it with a utility knife.


True or false: ASTM has one pull-off adhesion test of coatings on concrete, and a separate one for coatings on metal substrates.


What is another name for a tensile adhesion test of coatings?


True or false: The adhesion of a coating to a steel substrate depends entirely upon the mechanical attachment or hooking of the coating to the profile of the steel.


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


True or false: Portable pull-off adhesion testers include ones that operate by application of mechanical or hydraulic or pneumatic force.


True or false: ASTM D 4541, Standard Test Method for Pull-Off Strength of Coatings Using Portable Adhesion Testers, requires a score around the loading fixture when the film thickness of the coating exceeds 20 mils.


True or False: ASTM D3359, “Standard Test Method for Measuring Adhesion by Tape Test,” measures the tensile adhesion of a coating.


True or False: A study reported in JPCL indicated that broom finishes on repair mortars for wastewater service, when compared with abrasive blasting, provided better adhesion of linings applied over them.


What is the relationship between a fog coat and a mist coat of paint?


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.


A thin, pasty liquid used for adhering gold leaf and filling surface imperfections is called what?


True or false: The ASTM standard test method for measuring pull-off adhesion of coatings on concrete is the same one used for measuring pull-off adhesion of coatings on steel.


True or false: The ASTM test method for pull-off adhesion of coatings is the same for both metal and concrete.


True or false: Uncoated western red cedar siding should be weathered for several weeks before application of a primer to improve adhesion.


Which of the following coating adhesion tests is the least quantitative?


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


True or false: ASTM has a test method for evaluating the adhesion of a coating by cutting and probing it with a penknife.


Which of the following coating adhesion tests is the least quantitative?


 
 
   

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