🔍 Key Concepts

• Function of an air/oil separator in a gas turbine lube oil system • Difference between devices that remove solid particles (filters/strainers) and devices that separate fluids of different densities • How oil mist and air can be separated using mechanical action rather than temperature change

💭 Think About

• Look at the flow path into and out of the air/oil separator in the illustration: is the goal to trap dirt, change temperature, or separate two mixed fluids? • Which listed device would cause heavier oil droplets to move differently than the lighter air when the mixture is in motion? • Ask yourself which option is normally used for cleaning oil versus which is used for changing the direction or speed of a moving fluid.

✅ Before You Answer

• Verify which components in the diagram are already labeled as filters or strainers, and note their locations compared to the air/oil separator • Consider which choice is commonly associated with centrifugal or swirling action to separate substances of different densities • Confirm that the primary job here is air–oil separation, not contaminant removal or viscosity control