Engine : Expired / Motor Plants and Auxiliary Boilers - 704/354
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| The piston rod scraper box incorporated in a two-stroke/cycle, crosshead diesel engine serves to __________. |
| A) eliminate the necessity for an oil scraper ring |
| B) prevent side thrust and cylinder scoring |
| C) prevent sludge and dirty oil from entering the crankcase |
| D) scrape oil and carbon deposits off the cylinder walls |
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