🔍 Key Concepts

• Exhaust systems on small vessels and how they route gases from the engine to outside the hull • Health and safety risks of exhaust gas leaks, especially carbon monoxide (CO) • Why an exhaust must be gas tight and what could happen if exhaust leaks into enclosed spaces

💭 Think About

• Which of the options directly involves the danger of exhaust gases escaping into areas where people are located? • Think about what substance actually travels inside the exhaust pipe, and where you do NOT want that substance to go. • Which choices describe problems that are mainly mechanical or hydraulic, and which describe a serious crew/passenger safety hazard?

✅ Before You Answer

• Identify which answer choice involves toxic exhaust gases affecting people onboard. • Eliminate any options that do not clearly depend on gases leaking out of the exhaust pipe along its length. • Consider Coast Guard safety emphasis: what is the primary hazard they worry about with leaky exhaust systems?