[Installation Procedures] The mock-up for vibration cast installations demonstrates the adequacy of the: (This may have more than one correct answer…

The purpose of a mock-up for vibration cast installations, as defined by API 936, is to qualify the installation procedure. This test specifically demonstrates that the proposed equipment (e.g., mixers, vibrators), the method of attaching the vibrators to the forms, and the overall vibration technique (e.g., frequency, duration, pattern) are adequate to achieve a properly consolidated refractory lining. This qualification ensures the chosen procedure can produce a dense, void-free lining consistent with the material manufacturer's requirements and project specifications before full-scale installation begins.

A. craftsman's ability to construct the forms.

This is incorrect because the mock-up primarily qualifies the vibration procedure, not the individual craftsman's skill in formwork, which is covered under general applicator qualification.

1. American Petroleum Institute (API). (2014). API Standard 936: Refractory Installation Quality Control—Inspection and Testing Monolithic Refractory Linings and Materials (4th ed.).

Section 6.3.3.1: This section explicitly states

"A mock-up shall be installed to demonstrate the adequacy of the equipment

means of vibrator attachment

and vibration method." This directly supports options B

C

and D as the correct answers.

Section 6.2: This section

"Applicator/Installer Qualification

" covers the qualification of the individual craftsman's skills

which is a separate requirement from the procedure qualification mock-up discussed in Section 6.3. This supports why option A is incorrect.