Which risk increases when an aircraft hydraulic system's relief valve fails closed during thermal expansion?

💡 Explanation

When a relief valve fails closed during thermal expansion, pressure builds up in the hydraulic system because the fluid has no outlet, eventually exceeding the system's pressure limit. Therefore, rupture of hydraulic lines results, rather than cavitation, flutter, or seizure, which require different mechanisms and operating conditions.

• Which instability develops if a PLC executes ladder logic faster than an actuator's mechanical response time?
• Which outcome occurs when adaptive signal processing erroneously cancels pilot tones in aeronautical communication?
• Which risk increases when using avalanche photodiodes near breakdown?
• Which protective action is performed by inverse time circuit breakers?
• Which outcome occurs in hydraulic actuators using spool valves when aggressive position modulation exceeds pressure limits?
• Which risk markedly increases when impedance surges through transmission lines?