🔍 Key Concepts

• 46 CFR requirements for MODU fire protection rather than for regular inspected vessels • Difference between working pressure and test pressure for fire hoses • The typical safety margin used when testing hoses above their normal operating pressure

💭 Think About

• Is the required test pressure usually just equal to normal operating pressure, or some percentage above it for safety? • Think about whether MODUs, due to higher risk offshore, would likely require a higher or lower test pressure than standard shipboard hoses. • Compare these options to what you know about common fire main pressures on board. Which value looks more like a test pressure rather than normal service pressure?

✅ Before You Answer

• Verify the specific 46 CFR subchapter for Mobile Offshore Drilling Units rather than general cargo/passenger vessel rules. • Check whether the regulation says "at least" a certain psi, not "about" or "approximately". • Make sure you are looking at the requirement for all fire hoses on MODUs, not just for one special location (e.g., helicopter deck).