Question 488Steam Plants - Assistant Engineer
70% to passThe most harmful slag forming compounds found in fuel oils are _______________.
Apotassium and nickel
Bvanadium and sodium
Ccalcium and silica
Diron and sulfur
AI Explanation
The correct answer is B) vanadium and sodium. Vanadium and sodium are the most harmful slag-forming compounds found in fuel oils. These compounds can form deposits on boiler and turbine components, leading to decreased efficiency and increased maintenance requirements. This is an important consideration for the operation and maintenance of vessels, which is a key part of the US Coast Guard Captain's License Examinations. The other options are incorrect because potassium and nickel (A) are not the primary slag-forming compounds, calcium and silica (C) are less problematic than vanadium and sodium, and iron and sulfur (D) do not directly contribute to slag formation in the same way as the correct answer.
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