🔍 Key Concepts

• 46 CFR requirements for equipment used in fuel tanks or hazardous locations • Differences between flame resistant, explosion proof, corrosion resistant, and moisture proof equipment • Why electrical equipment in a space with fuel vapors is especially dangerous

💭 Think About

• Ask yourself: In a fuel tank, what is the primary hazard that the regulation is trying to control when using an electric hand lamp? • Which of these four characteristics specifically addresses the risk of igniting fuel vapors from electrical sparks or heat? • Which terms are more about long‑term durability, and which are directly related to preventing ignition in a flammable atmosphere?

✅ Before You Answer

• Verify in 46 CFR what term is used for electrical equipment permitted in flammable or explosive atmospheres • Check which option directly addresses ignition of vapors rather than just protection from water or rust • Confirm that the chosen term is a standard classification used for electrical devices in hazardous locations