Proper lubrication of the main bearings is more easily obtained in a single acting, four-stroke/cycle diesel engine than in a two-stroke/cycle diesel engine because __________.

Question

Accepted Answer

the direction of pressure on the journals in four-stroke engines is continuously reversing, whereas in two-stroke engines it is constant

Answer

positive feed lubricators are installed on all bearings of four-stroke engines, whereas as a splash feed system is used on two-stroke engines

Answer

four-stroke engines usually utilize a heavier grade of fuel oil than two-stroke engines

Answer

two-stroke engines usually consume less lube oil than four-stroke engines

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