Question 145Steam Plants - QMED

The correct answer is A) Excessive lube oil consumption. When there is a leak in the lube oil cooler, it can allow the lube oil to mix with the engine's cooling water, leading to excessive lube oil consumption. This is because the lube oil is being lost through the leak in the cooler, requiring more frequent topping up of the lube oil system. The other options are incorrect because: B) Contamination of the lube oil would be a symptom of a different issue, not necessarily a leaking lube oil cooler. C) Excessive water discharge rate from the lube oil purifier would be a symptom of the contamination, not the direct cause. D) Corrosion of the journals and bearings is a potential consequence of the lube oil contamination, but not a direct indicator of a leaking lube oil cooler.