TBN is a measure of which property in lubricant oil?

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Study for the Junior Officer Surface Material Readiness Course Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

TBN is a measure of which property in lubricant oil?

Explanation:
TBN measures the oil’s reserve alkalinity, meaning how much base the lubricant contains to neutralize acidic byproducts during use. This buffering capacity protects engine metal surfaces and seals from corrosion as acids form from combustion and sulfur compounds. A higher total base number indicates more acid-neutralizing ability remains, extending oil life, while a low TBN signals the oil may no longer provide adequate protection. This property is about chemical buffering, not how thick the oil is (viscosity), nor about flammability (flash point) or cold-flow behavior (pour point).

TBN measures the oil’s reserve alkalinity, meaning how much base the lubricant contains to neutralize acidic byproducts during use. This buffering capacity protects engine metal surfaces and seals from corrosion as acids form from combustion and sulfur compounds. A higher total base number indicates more acid-neutralizing ability remains, extending oil life, while a low TBN signals the oil may no longer provide adequate protection. This property is about chemical buffering, not how thick the oil is (viscosity), nor about flammability (flash point) or cold-flow behavior (pour point).

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