Kentucky Boiler Practice Exam

What must be true about original mill material stencils and markings during inspection?

1. They can be faded

2. They must be legible

3. They are optional

4. They should be absent

The correct answer is: They must be legible

During an inspection, the stencils and markings on original mill materials are critical for verifying the material's identity, grade, and origin. These markings provide essential information that ensures the material meets the necessary standards and specifications required for safe operation in boiler systems. For safety and regulatory compliance, the markings must be legible to confirm that the materials are suitable for their intended use. Illegible or missing markings could lead to the use of inappropriate materials, which may compromise the boiler's integrity and safety. Thus, it is essential that the stencils and markings are clearly visible during the inspection process. This legibility is key to ensuring traceability and accountability within the manufacturing and installation processes. The other options do not align with the standards expected for mill material inspections, as faded markings could hinder verification, making them inadequate for evaluating compliance, whereas optional or absent markings would pose a risk for safety and material verification.