[Inspection and Testing Requirements] Which of the following is the appropriate term for testing refractory that was sampled during project site installation in order to confirm that it meets specified physical property standards?

As-installed testing is the correct term for the evaluation of refractory samples taken from the actual installation. This testing is performed to verify that the physical properties of the refractory material, after being mixed and applied on-site, meet the project's specified requirements. It confirms the quality of both the material and the installation workmanship, accounting for variables like water content, mixing procedure, and application technique. This is distinct from pre-qualification testing, which is done on the material before it is shipped to the site.

A. Hammer testing: This is a qualitative, non-destructive inspection method used after curing to check for voids or delamination, not a quantitative test of physical properties on a sample.
B. Pre-qualification testing: This testing is performed on refractory materials before installation to qualify the manufacturer's product, not on samples taken from the actual on-site installation.
D. Visual testing: This is a form of inspection to identify surface defects, improper application, or other visible flaws. It does not involve taking samples to measure physical properties.

1. American Petroleum Institute (API) Standard 936

4th Edition

December 2014. Refractory Installation Quality Control—Inspection and Testing Monolithic Refractory Linings and Materials.

Section 3.1.4: Defines "as-installed testing" as "Testing to determine physical properties of refractory materials taken from the installation." This directly supports the correct answer.

Section 3.1.31: Defines "pre-installation testing (qualification testing)" as "Testing to determine physical properties of refractory materials before installation..." This clarifies why option B is incorrect.

Annex A

Section A.4.3.1: Lists "Hammer testing" as a post-installation inspection activity to check for voids

confirming it is an inspection technique

not the term for sample testing.