Question 472Motor Plants - Assistant Engineer70% to pass
Lube oil in the fresh water cooling system of a diesel engine may result from a_______________.
AI Explanation
The correct answer is C) lube oil cooler failure.
A lube oil cooler failure can allow lube oil to enter the fresh water cooling system of a diesel engine. This happens because the lube oil cooler is designed to keep the lube oil separate from the fresh water cooling system. If the cooler develops a leak or fails, it can allow lube oil to mix with the fresh water, resulting in lube oil contamination in the cooling system.
The other answer choices are incorrect because they would not directly allow lube oil to enter the fresh water cooling system. A camshaft seizure, lube oil pump failure, or lube oil sump overflow would not necessarily result in lube oil entering the cooling system.
Related Questions
#470 What could cause the bypass valve in a full-flow lubrication system to open? #471 Which of the following effects will excessively cold lube oil have on the operation of a diesel engine? #473 On a diesel engine with direct-cylinder admission air starting, a leaking air starting valve would be indicated by_______________. #474 For a diesel engine, approximately how long can an electric starter motor be operated continuously before damage may begin to occur due to overheating? #475 When starting air is admitted, a diesel engine turns over very slowly without firing. The cause may be_______________.