Question 604Steam Plants - Assistant Engineer
70% to passWater retained in the lube oil system of a main propulsion turbine installation is undesirable because it _______________.
Acauses pitting of the gear teeth
Braises the flash point of the oil to a dangerously high level
Ccauses the turbine to over speed
Dresults in excessive cooling of bearing surfaces
AI Explanation
The correct answer is A) causes pitting of the gear teeth. Water retained in the lube oil system of a main propulsion turbine installation is undesirable because it can cause pitting of the gear teeth. This is due to the corrosive nature of water, which can degrade the lubricating properties of the oil and lead to increased wear and damage to the gear teeth. The other answer choices are incorrect because: B) raising the flash point would not be an issue, C) water in the oil would not cause the turbine to overspeed, and D) excessive cooling of bearing surfaces is not a concern caused by water in the lube oil system.
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