Question 158Motor Plants - Assistant Engineer

The correct answer is B) The device delivers the oil for piston cooling, in addition to liner lubrication. This is the correct answer because the component labeled "13" in the illustration MO-0122 is likely the oil supply pipe or line that provides lubricating and cooling oil to the piston and cylinder liner. Proper piston cooling and lubrication are critical for the safe and efficient operation of marine diesel engines, as required by US Coast Guard regulations. The other answer choices are incorrect because they do not accurately describe the function of the specific component shown in the illustration. Option A refers to cooling water, option C describes a different piston cooling method, and option D is monitoring for piston blow-by, which is a different engine function.