🔍 Key Concepts

• Fire and explosion risk when cleaning hydraulic components • Effects of cleaners on rubber seals, hoses, and paint • USCG / industry preference for non‑flammable, non‑toxic, and non‑damaging cleaners

💭 Think About

• Which option would be least likely to attack seals, hoses, and coatings commonly found in hydraulic systems? • Which option is least flammable and least hazardous for crew health in an enclosed machinery space? • Think about what kind of cleaner is commonly approved for routine engine room cleaning and degreasing, not just what can dissolve grease.

✅ Before You Answer

• Eliminate any choice known to be highly toxic in confined spaces. • Eliminate any choice that is highly flammable and could easily ignite from a hot surface or spark. • Ask yourself which cleaner is typically labeled as safe for general machinery and deck cleaning on board ships.