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How are the piston pins of most aircraft engines lubricated?
| | A) By the action of the oil control ring and the series of holes drilled in the ring groove directing oil to the pin and piston pin boss. |
| | B) By oil which is sprayed or thrown by the master or connecting rods. |
| | C) By pressure oil through a drilled passageway in the heavy web portion of the connecting rod. |
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