🔍 Key Concepts

• Hydraulic steering system operation – how incompressible fluid normally transmits force • Effect of air in hydraulic lines – air is compressible, oil is not • Difference between a system symptom and an indicator or protection device

💭 Think About

• Think about what changes physically when air mixes with hydraulic oil: does the system get faster, slower, or just show a visual sign? • Which option describes how the rudder movement and control would feel at the helm if the fluid cannot transmit force efficiently? • Which choices describe things that might happen, versus the most direct, primary effect on steering performance?

✅ Before You Answer

• Identify which option describes the primary operational effect on steering response, not a secondary sign or safety feature • Ask yourself: in hydraulics, when you replace solid oil with compressible air, does motion become more positive and quick or spongy and delayed? • Eliminate any options that refer to over‑speeding or relief valves unless you can explain clearly why trapped air would directly cause that.