Question 607Steam Plants - Assistant Engineer
70% to passA cloudy or milky appearing lube oil sample, taken from the main lubricating oil system could be caused by _______________.
Ainsufficient cooling water to the lube oil cooler
Binsufficient gland sealing steam
Cexcessive cooling water to the lube oil cooler
Dexcessive gland sealing steam
AI Explanation
The correct answer is D) excessive gland sealing steam. A cloudy or milky appearing lube oil sample indicates the presence of water in the lubricating oil. This can be caused by excessive gland sealing steam, which can introduce water into the lube oil system. Gland sealing steam is used to prevent air from being drawn into the crankcase, but excessive amounts can lead to water contamination of the oil. The other options are incorrect because insufficient cooling water (A) or excessive cooling water (C) to the lube oil cooler would not directly introduce water into the oil. Insufficient gland sealing steam (B) would not cause water contamination.
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