What role is coded as 999?

• A. All
• B. Teardown
• C. Inspection
• D. Build Up

Answer: (D)

In this coding system, numbers tag different maintenance actions within a procedure. The code 999 is the tag used for the Build Up role, which covers the activities of assembling or installing components to bring the unit into service. That’s why Build Up is the correct match: it represents the hands-on assembly tasks needed to put the equipment together and ready it for testing or commissioning.

Teardown refers to disassembly, not assembly. Inspection is about checking and verifying condition or quality. Build Up, as the assembly step, is exactly what the 999 code signals in this scheme. So when you see 999, you should expect tasks like aligning, bolting, connecting, and configuring components to complete the build before subsequent steps.