🔍 Key Concepts

• General purpose compressed air systems that serve multiple locations on a vessel • Difference between air used for specific control systems versus air used for general shipboard services • Typical terminology used in engine room piping and machinery diagrams for air distribution

💭 Think About

• Which option best describes a system that serves many outlets around the ship rather than a single piece of equipment? • Which names sound like they are for specialized functions (such as combustion or deck only) instead of an all-purpose air distribution system? • If the same compressor and piping feed both the engine room and deck outlets, what would you call that system in a machinery diagram or piping plan?

✅ Before You Answer

• Identify which choice refers to general shipwide air use rather than a limited-purpose system • Eliminate any option that sounds restricted to one location (such as deck only) or one function (such as combustion control only) • Ask yourself what term would most likely appear on a piping and instrumentation diagram (P&ID) for general compressed air outlets around the vessel