Question 415Motor Plants - Assistant Engineer

The correct answer is D) breaking of the rings, ring lands, or both during piston removal. The wear ridge that develops near the top of the cylinder liner is caused by the repeated action of the piston rings during engine operation. If this ridge is not removed during maintenance, it can prevent the piston from being removed easily, which can lead to the breaking of the piston rings or the ring lands (the areas between the rings). This is because the ridge can create a tight fit between the piston and the cylinder liner, causing excessive resistance during piston removal. The other answer choices are incorrect because they do not directly address the issue of piston and ring damage during removal. Excessive ring wear, excessive lubrication, or improper lubrication coating are not the primary concerns when dealing with the wear ridge issue.