What is the first step in a safe power-up sequence?

• A. Pre-start up diagnostics
• B. Visual inspection
• C. Interlock verification
• D. Safety checks

Answer: (D)

Safety checks are the first step because you must confirm all protective measures and conditions are in place and functioning before any power is applied. This means guards or doors are closed, the emergency stop is reset, safety interlocks and circuits are verified, area clear, grounding is correct, and no fault indicators are active. Establishing this safe baseline prevents energizing equipment when hazards exist and sets the stage for any further diagnostics or tests. Visual inspection is useful for spotting obvious issues, but it can miss hidden faults in safety systems; safety checks cover these safeguards comprehensively and should come first before proceeding with deeper checks.