🔍 Key Concepts

• Portable cargo tanks for cryogenic liquids – what risks do they pose if something goes wrong? • Where hazardous materials may be stowed – on deck vs. under deck and the role of ventilation • Placarding and hazard classes – what wording is used for toxic gases vs. mild irritants

💭 Think About

• Think about which option reflects a clear, specific safety control (e.g., preventing dangerous vapor buildup or excessive pressure). • Consider whether each statement sounds like a general rule that would apply broadly, or something that is too narrow or oddly worded to be an actual regulation. • For the placard option, ask yourself: does tear gas fall under the same category as mild irritants, or is it treated as a more serious hazard class?

✅ Before You Answer

• For each option, ask: does this align with how cryogenic liquids are normally controlled (pressure, temperature, and ventilation)? • Recall that hazardous gases in confined spaces require particular care – which choice best addresses that risk? • For placards, verify whether toxic / poisonous gases use wording like "Irritant" or a different hazard description.