🔍 Key Concepts

• Hydrogen sulfide (H₂S) behavior in air on offshore structures like MODUs • How gas density compared to air affects where the gas will accumulate (high vs low areas) • Typical appearance and toxicity of H₂S in industrial safety context

💭 Think About

• Think about whether dangerous gases on offshore installations tend to collect in low spaces (pits, bilges, lower decks) or rise and disperse upward • Consider if H₂S is something you can reliably detect by color or smell, and whether safety training teaches you to trust your nose or instruments • Ask yourself if H₂S is considered only mildly harmful or extremely hazardous, and how that would be treated in safety procedures

✅ Before You Answer

• Verify whether H₂S is visible or colored, or if it is normally colorless and not easily recognized by appearance • Recall if H₂S is taught as highly toxic, even at relatively low concentrations • Think about whether H₂S is described in training as collecting in low-lying areas or rising above the work area