🔍 Key Concepts

• Fluid power system design requirements for safety and reliability • Effect of back pressure on the performance of hydraulic/pneumatic components • Difference between avoiding harmful back pressure and requiring back pressure for control

💭 Think About

• In a multi‑unit hydraulic system, what could happen if one unit’s operation changed the back pressure for all the others? Would that be safe and predictable? • Is a designer’s main goal to always maintain back pressure, or to ensure the system works correctly under all normal pressure conditions, including back pressure? • Which choice sounds like a broad, overall design principle rather than a special case or side effect?

✅ Before You Answer

• Identify which option focuses on independence of unit operation within the whole system • Check which statements incorrectly assume that back pressure must always be maintained or created • Eliminate any choice that sounds like a special operating condition rather than a general design requirement for all fluid power systems