Question 90Motor Plants - QMED
70% to passWhich of the following statements is true concerning a main diesel engine oil cooler?
AThe oil pressure is greater than the cooling water pressure.
BThe oil flow control valve is always installed in the oil input line.
CThe oil temperature is less than the cooling water temperature.
DThe oil pressure is less than the cooling water pressure.
AI Explanation
The correct answer is A) The oil pressure is greater than the cooling water pressure. This is the correct answer because in a main diesel engine oil cooler, the oil needs to be at a higher pressure than the cooling water in order to flow through the cooler. This allows the oil to be effectively cooled by the lower-pressure cooling water. The higher oil pressure ensures that the oil can circulate through the cooler and return to the engine. The other options are incorrect - B) is not always the case, C) would indicate an issue with the cooler, and D) would be the opposite of the required pressure relationship.
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