🔍 Key Concepts

• Cryogenic liquids and how extremely low temperatures affect metals • Difference between brittleness, corrosion, and toxicity • What part of the vessel’s structure (hull, tanks, piping) would be most at risk from very cold cargo

💭 Think About

• Ask yourself: Which option describes a problem caused mainly by temperature rather than by chemical reaction or poison? • Think about how mild steel behaves when it gets very, very cold—does it become softer, harder, or more likely to crack? • Which choice directly relates to the ship’s structural strength (ability to resist cracking or breaking)?

✅ Before You Answer

• Focus on the phrase "structural integrity" — that means strength and resistance to cracking or failure, not whether a substance is poisonous. • Decide which options describe chemical properties (like corrosion or toxicity) versus mechanical effects (like cracking or fracture). • Recall that cryogenic cargoes (like LNG) are handled with special materials and insulation because of their extremely low temperature — consider how that low temperature affects ordinary ship steel.