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Verifying the Quality of Coating Installation–Post-Application Quiz
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Question 1 of 30
1. Question
In terms of coating performance, a holiday is:
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Question 2 of 30
2. Question
Which of the following is a common cause of pinholes in a coating?
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Question 3 of 30
3. Question
What is the coating thickness threshold that determines whether low voltage or high voltage holiday detection is used?
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Question 4 of 30
4. Question
For holiday detection to be used successfully, the coating must be:
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Question 5 of 30
5. Question
For holiday detection to be used successfully, the substrate must be:
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Question 6 of 30
6. Question
What type of water is recommended to be used to saturate the sponge on a low voltage holiday detector?
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Question 7 of 30
7. Question
How does an operator verify continuity of a low voltage (wet sponge) holiday detector?
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Question 8 of 30
8. Question
What is the thickness threshold of a coating that would require a wetting agent to be added to the water?
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Question 9 of 30
9. Question
What factor determines the test voltage for inspecting a coating using a high voltage holiday detector?
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Question 10 of 30
10. Question
Calculate the correct voltage setting for inspecting a 60-mil lining using a high voltage holiday detector.
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Question 11 of 30
11. Question
According to ASTM D5162, what is the maximum rate that the wetted sponge or electrode is scanned across the coated surface?
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Question 12 of 30
12. Question
What is the primary purpose of testing the hardness of a coating on a pipe?
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Question 13 of 30
13. Question
What type of Durometer is typically used to test thick film epoxy pipe coatings?
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Question 14 of 30
14. Question
When testing the hardness of a coating using a Durometer, what unit of measure is used?
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Question 15 of 30
15. Question
Which of the following is used to verify the accuracy of a Durometer prior to use?
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Question 16 of 30
16. Question
What is the minimum number of hardness readings to obtain per area?
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Question 17 of 30
17. Question
True of False: ASTM provides a hardness value correction table based on the prevailing surface temperature and relative humidity at the time of testing.
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Question 18 of 30
18. Question
True or False: Tensile adhesion is also considered “pull-off” adhesion.
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Question 19 of 30
19. Question
True or False: Shear adhesion is also considered “pull-off” adhesion.
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Question 20 of 30
20. Question
A distinct break between coating layers or between the substrate and first coating layer is called a/an:
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Question 21 of 30
21. Question
A break within a coating layer is called a/an:
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Question 22 of 30
22. Question
True or False: According to ASTM D4541, when testing the adhesion of coatings on steel, the operator must always test the coating to the point where it fractures.
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Question 23 of 30
23. Question
Why is scoring the coating not recommended for thin film coatings?
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Question 24 of 30
24. Question
What situation may require scoring of the coating prior to pull-off adhesion testing?
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Question 25 of 30
25. Question
Which of the following is not an alignment process used by pull-off adhesion testers?
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Question 26 of 30
26. Question
Which of the following is not a method of applying tensile force using portable adhesion testers?
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Question 27 of 30
27. Question
The most common diameter loading fixture for determining the pull-off adhesion of coatings on steel is:
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Question 28 of 30
28. Question
What is the maximum pull-off rate in psi/second specified by ASTM D4541?
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Question 29 of 30
29. Question
What is the minimum number of replicates per area prescribed by ASTM D4541 to characterize the adhesion properties of a coating?
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Question 30 of 30
30. Question
True or False: According to ASTM D6677, the adhesion properties of a coating can be evaluated using a utility knife blade and a rating scale.
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