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Question

Difficulty: EasyDirect Fact Retrieval

During pre-flight inspections of tactical transport helicopters, maintenance crews must examine the main rotor gearbox oil sight glass. The oil level must sit between the minimum and maximum indicator rings while the aircraft rests on level ground. If the oil appears milky or cloudy rather than clear amber, technicians must immediately ground the helicopter and replace the fluid, as cloudiness indicates water contamination. Operating the rotor system with contaminated fluid can cause rapid gear wear and catastrophic transmission failure.

According to the passage, what does a milky or cloudy appearance in the gearbox oil indicate?

  1. A
    Catastrophic transmission failure
  2. Water contaminationAnswer
  3. C
    Rapid gear wear from prior flights
  4. D
    Normal oxidation from high operating temperatures

Answer

A milky or cloudy appearance in the gearbox oil indicates water contamination.
The author explicitly states that 'cloudiness indicates water contamination,' making water contamination the direct factual answer.

Step-by-Step Solution

1
Locate the sentence discussing the physical appearance of the oil in the sight glass.
Found: 'If the oil appears milky or cloudy rather than clear amber, technicians must immediately ground the helicopter and replace the fluid, as cloudiness indicates water contamination.'
Direct fact retrieval requires matching the specific condition in the question stem to the exact factual statement in the passage.
2
Extract the direct cause explicitly identified by the author.
Cloudiness is explicitly defined as indicating water contamination.
Eliminates potential distractors that mention subsequent outcomes such as gear wear or transmission failure.

Key Concept

Direct Fact Retrieval
Estimated Time:45s
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Topics

Direct Fact Retrieval

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