🔍 Key Concepts

• Difference between absorption and adsorption in basic chemistry/physics • How lube oil filters remove contaminants: within the media vs on the surface • What would realistically cause a pressure drop or remove additives in a lube oil system

💭 Think About

• Think about the root words: what does absorb usually mean compared to adsorb? How does that change where the contaminant goes? • Which option talks about contaminants going into the body of the filter material, and which talk about them staying mostly on the surface? • Are claims about pressure drop or removing additives describing the main difference between these two filter types, or are they unrelated or side effects?

✅ Before You Answer

• Identify which option clearly describes contaminants being taken into the bulk of the filter media, not just onto its surface • Check whether pressure drop and additive removal are actually defining characteristics of absorbent vs adsorbent filters • Eliminate any answer that focuses on system performance (like pressure drop) instead of the basic physical mechanism of how the filter traps contaminants