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0069
Which statement is true regarding fouling of the spark plugs of an aircraft engine?
| | A) Spark plug fouling results from operating with an excessively rich mixture. |
| | B) Carbon fouling of the spark plugs is caused primarily by operating an engine at excessively high cylinder head temperatures. |
| | C) Excessive heat in the combustion chamber of a cylinder causes oil to form on the center electrode of a spark plug and this fouls the plug. |
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