🔍 Key Concepts

• Common properties required of marine greases (e.g., water resistance, corrosion protection, temperature range) • Differences between traditional soap-based thickeners used in older equipment vs. modern multi‑purpose marine greases • Which base is most commonly found in general-purpose industrial and automotive greases, including many marine applications

💭 Think About

• Think about which thickener base is widely used today in multi-purpose greases that must handle both water exposure and moderate to high temperatures. • Consider which option is known for good mechanical stability and shear resistance, making it suitable for bearings and rotating machinery on vessels. • Ask yourself: which of these bases is commonly mentioned in maintenance manuals for general-purpose or multi‑purpose grease on ships and small craft?

✅ Before You Answer

• Verify which base is described in study materials as the most common modern multipurpose grease thickener, not just for marine but also for automotive and industrial uses. • Check which base has good water resistance and oxidation stability, making it suitable for marine environments. • Eliminate any options that are mainly associated with lower temperature limits or more specialized/non‑general‑purpose uses.