🔍 Key Concepts

• Purpose and sequence of components in a lube oil system (pump → filter → cooler → engine) • How temperature affects lube oil viscosity and filter performance • Practical reasons designers choose the location of the cooler relative to the filter

💭 Think About

• Think about whether a filter removes contaminants better when the oil is warmer or cooler and how that affects flow through the element. • Consider what problem would be solved by putting the cooler before the filter instead—what issue might that create for the filter or the system? • Ask yourself which option describes a direct benefit of having oil filtered before it reaches the cooler tubes or plates.

✅ Before You Answer

• Verify which choice talks about filter performance and oil condition rather than unrelated system features. • Check if any option mentions something that is not normally controlled by the order of filter and cooler (for example, pump suction is usually on the sump side). • Confirm which choice best matches a logical engineering reason for protecting or improving the operation of one component by placing the other first.