🔍 Key Concepts

• 46 CFR Part 150 (Compatibility of Cargoes) for multiple-product tankships • Special requirements for toxic, corrosive, and carcinogenic cargoes • Protective equipment and warning sign requirements for specific cargoes in the Certificate of Inspection or cargo regulations

💭 Think About

• For each choice, ask: Is this a general rule for all hazardous cargoes, or does it apply only to certain specific cargoes? • Consider the properties of crotonaldehyde, phosphoric acid, and morpholine (e.g., are any of them known carcinogens? strong corrosives? reactive with certain metals?). • Think about what is usually the minimum versus recommended level of protective gear for sampling corrosive acids.

✅ Before You Answer

• Verify in 46 CFR Part 150 whether morpholine must be separated by two barriers from acids like phosphoric acid or from crotonaldehyde. • Check the specific personal protective equipment (PPE) table for sampling phosphoric acid and see if it only requires goggles/face shield or if more is listed as minimum. • Look up whether crotonaldehyde, phosphoric acid, or morpholine are specifically flagged as carcinogens requiring a "cancer hazard" legend on warning signs, and whether there is a rule that bans all aluminum, copper, and zinc in valve parts for these cargoes.