🔍 Key Concepts

• Full-flow filtration in hydraulic systems (what "full-flow" means) • Typical locations of filters in closed-loop vs. open-loop hydraulic systems • How return-line vs pressure-line vs fill-line filters affect what fluid actually gets filtered

💭 Think About

• Ask yourself: In a multi-operation hydraulic system, where does all the oil reliably pass through during normal operation? • Which line (pressure, return, between valve and actuator, or fill) will see continuous flow from every function, not just occasional or partial flow? • Which location best protects the entire system over time, while still being practical in terms of filter size, cost, and pressure rating?

✅ Before You Answer

• Verify which line carries combined flow from all actuators back toward the reservoir • Check which answer choice corresponds to a line that is under lower pressure, allowing a large-capacity full-flow filter to be used economically • Eliminate any choice where fluid might bypass the filter during some normal operations or where only a small portion of total system flow is filtered