Question 78Steam Plants - Assistant Engineer
70% to passExcessive alkalinity of boiler water will cause _______________.
Acaustic embrittlement
Bscale formation
Csodium sulfite reacting with dissolved oxygen
Dcalcium carbonate precipitation
AI Explanation
The correct answer is A) caustic embrittlement. Excessive alkalinity (high pH) in boiler water can lead to caustic embrittlement, which is the weakening and cracking of metal components in the boiler system. This is caused by the buildup of sodium hydroxide or other alkaline compounds that penetrate the metal and make it brittle over time. The other options are incorrect because: B) scale formation is caused by mineral deposits, not alkalinity; C) sodium sulfite reacting with dissolved oxygen is not related to alkalinity; and D) calcium carbonate precipitation is caused by hardness, not alkalinity.
Related Questions
Q236:The purpose of a 'peep' hole in the boiler casing is to _______________. Q638:The constant pressure governor of a turbine-driven feed pump maintains which of ... Q56:You are standing watch in the engine room of a steam vessel. You should blow dow... Q297:The main steam stop bypass valve is used to _______________. Q414:Steam assist fuel atomizers are converted to straight mechanical atomizers in or...
Ready to test your knowledge?
Take a Steam Plants - Assistant Engineer Practice ExamOfficial Resources