Which test assesses water and particle contamination in 2190TEP Lube Oil samples?

• A. Viscosity Index test
• B. Bottom Sediment and Water (BS&W) test
• C. Specific Gravity test
• D. Water Content test

Answer: (B)

Focus on contamination measurement in lubricant samples. The Bottom Sediment and Water test is designed to directly quantify both free water and settled solids in oil, giving a clear indication of how contaminated the lubricant is. In practice, the sample is allowed to separate (or is centrifuged), and the amount of water plus bottom sediment is measured to produce a contamination value. This is crucial for 2190TEP Lube Oil because water and particulate matter can degrade film strength, promote corrosion, and accelerate wear in bearings and pumps.

Other tests target different properties. Viscosity Index shows how viscosity changes with temperature, not contamination. Specific Gravity indicates density, which doesn’t measure cleanliness. A Water Content test determines how much moisture is present but doesn’t account for sediment particles. So, for assessing both water and particle contamination in one result, the Bottom Sediment and Water test is the best choice.