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Difficulty: MediumCausal Detail Extraction

In aircraft hydraulic systems, improper fluid maintenance can initiate several distinct mechanical failures. When hydraulic fluid becomes contaminated with microscopic air bubbles, the resulting fluid compressibility leads to a spongy actuator response. If fluid viscosity becomes excessively high due to extreme cold temperatures, the pump experiences severe cavitation, causing surface pitting on the impeller blades. Furthermore, when particulate contamination clogs the micro-screen bypass filter, differential pressure surges force unfiltered fluid across delicate spool valves, causing mechanical jamming of the flight control actuators. Based on the passage, match each stated operating condition with its direct mechanical consequence.

  • Hydraulic fluid contaminated with microscopic air bubblesSpongy and delayed actuator response
  • Excessively high fluid viscosity from extreme coldSurface pitting on pump impeller blades
  • Particulate contamination clogging the micro-screen filterMechanical jamming of flight control spool valves

Answer

Match air bubble contamination with spongy actuator response, high fluid viscosity with pump impeller surface pitting, and filter clogging with flight control valve jamming.
Each operating condition is paired with its directly stated consequence in the passage: air bubble contamination causes a spongy actuator response, extreme cold viscosity causes pump cavitation and impeller pitting, and filter clogging causes spool valve jamming.

Step-by-Step Solution

1
Identify the cause-and-effect statement regarding air bubbles in the passage.
The text states that microscopic air bubbles increase fluid compressibility, leading to a spongy actuator response.
This establishes the direct causal link for the first operating condition.
2
Locate the explicit outcome tied to high fluid viscosity in cold temperatures.
The passage specifies that high viscosity causes severe cavitation, which results in surface pitting on impeller blades.
This confirms the correct mechanical consequence for the second operating condition.
3
Extract the consequence directly linked to particulate filter clogging.
The text notes that clogged filters allow particulate-laden fluid to reach delicate spool valves, producing mechanical jamming.
This completes the matching set using stated textual details.

Key Concept

Causal Detail Extraction in Technical Passages
Estimated Time:1m 30s
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Topics

Causal Detail Extraction

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