🔍 Key Concepts

• Function of baffles in liquid storage/sump tanks • Requirements at the pump suction in a pressurized lube oil system (stable supply, minimal aeration) • Difference between settling tanks and sump tanks for removing contaminants or water

💭 Think About

• Look at where the baffles are located in the sump and how oil flows from the returns to the pump suction; what condition do they help create for the pump? • Which choice describes something that could realistically be achieved inside a relatively small, constantly circulating sump versus something that would need slow, quiet settling over time? • Think about what aspect of lube oil must remain uniform for the bearings and gears to be properly protected, especially as temperature changes.

✅ Before You Answer

• Verify which options would require long residence time and very low turbulence (is that realistic in a busy lube oil sump?) • Check which choice is focused on providing a stable, uniform supply to the pump suction rather than ‘cleaning’ the oil completely • Eliminate any options that claim to remove all of a contaminant (water, solids); consider if baffles alone can ever achieve “complete” removal in a running system