Question 75Motor Plants - Assistant Engineer

The correct answer is D) The lube oil enters through the supply pipes shown as #11 and eventually drains to the main engine sump. This is the correct answer because the illustration MO-0120 appears to depict a main engine lubrication system, where the lubrication oil is supplied through designated pipes (labeled #11) and then drains back into the main engine sump after performing its lubricating function. This is the standard method of providing lubrication to the main engine components in a marine propulsion system. The other answer choices are incorrect because: A) does not accurately describe the lubrication system shown, B) indicates the use of an excessively high-pressure system which is unlikely for a main engine, and C) specifies the use of a specific lubricant type, which is not the focus of the question.