Each hose used for transferring vapors must...

🔍 Key Concepts

• Requirements for vapor control system hoses in 33 CFR (look at Subchapter S, especially parts dealing with vapor collection on tank vessels and facilities) • Why burst pressure, electrical continuity, and vacuum resistance all matter for safe vapor transfer • How exam questions often treat multiple listed requirements: sometimes each item is required; sometimes only one is correct

💭 Think About

• Ask yourself: does the regulation specify only one of these properties for a vapor transfer hose, or are several different properties required at the same time? • Think about what could go wrong during vapor transfer: overpressure, static electricity buildup, or hose collapse under vacuum—would regulations typically ignore any of these hazards? • Consider whether the word “each” in the question suggests a single characteristic or a package of required characteristics

✅ Before You Answer

• Check in 33 CFR that vapor transfer hoses have a minimum design burst pressure requirement and note the exact value • Verify whether the regulation specifically states a maximum resistance value (in ohms) for electrical continuity of vapor hoses • Confirm whether hoses must be able to withstand a specified vacuum (in psi) without collapsing or constricting, and whether all these requirements apply to each hose used for transferring vapors

Each hose used for transferring vapors must be which of the following?

have a design burst pressure of at least 25 psig

be electrically continuous with a maximum resistance of 10,000 ohms

be capable of withstanding at least 2.0 psi vacuum without collapsing or constricting

All of the above

🔍 Key Concepts

💭 Think About

✅ Before You Answer