In which phase are the document equipment and system start-ups carried out?

• A. Design
• B. Post-Acceptance
• C. Construction
• D. Acceptance

Answer: (C)

Starting up equipment and documenting those start-ups happens during construction because this is when the installed equipment is energized and initial performance and control sequences are verified on site. During construction, field wiring, piping, and control systems are brought online, startup procedures are executed, safety interlocks and alarms are checked, equipment is calibrated, and results are recorded for later reference. This on-site work lays the foundation for commissioning and helps ensure systems are ready for formal acceptance.

In the design phase the plans and specifications for how startups should be performed are created, but the actual energizing and validation happen on site during construction. Post-acceptance and acceptance phases come after the equipment has been installed and initial startup and testing are completed, focusing on verification, documentation, and handover rather than the first-time startup of equipment.