🔍 Key Concepts

• Oil emulsification and how water mixes with lubricating oil • Effects of water contamination on lubricating film and friction surfaces • Relationship between emulsified oil and sludge, wear, and viscosity

💭 Think About

• Think about what happens when water gets into lube oil and mixes thoroughly instead of separating out. Does this make the oil work better or worse as a lubricant? • Which option describes a likely problem in areas where metal parts rub together if the oil is partly replaced by an oil-water mixture? • Consider whether emulsification would clean the oil or make it dirtier and more prone to deposits.

✅ Before You Answer

• Verify what an emulsion is: a stable mixture of two normally immiscible liquids, like oil and water. • Check which choice describes a negative effect on lubrication, especially in high-friction areas like bearings and gears. • Confirm which option would remove effective lubricating oil from between moving parts rather than improve it.