Module 7 Maintenance Practices Practice Questions - UK CAA Part-66 AME Module 7 - Maintenance Practices Exam

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Why is it strictly prohibited to allow oil, grease, or hydrocarbon lubricants to come into contact with high-pressure gaseous oxygen components?

Oil and grease can spontaneously ignite or explode in the presence of pure high-pressure oxygen Hydrocarbons react with oxygen to form corrosive nitric acid that eats through stainless steel lines Grease absorbs oxygen gas, causing severe pressure drop in the crew emergency oxygen system Hydrocarbons freeze at altitude and block the narrow orifices of oxygen regulators

Correct Answer:

Oil and grease can spontaneously ignite or explode in the presence of pure high-pressure oxygen

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