Oilers/Plant Tenders (HHC) Civil Service Practice Exam

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The neutralization number of an oil is an indication of its?

Viscosity
Density
Acidity
Flash Point

The correct answer is: Acidity

The neutralization number of an oil is a measure of its acidity, which indicates the amount of acidic compounds present in the oil. This is important because high acidity can affect the oil's stability and its performance in various applications. The neutralization number is determined through a titration process, where the oil is reacted with a base until neutralization occurs. Understanding the acidity of oil is essential for plant tenders and oilers, as it can directly impact the oil's quality, potential for corrosion in equipment, and overall effectiveness in its intended use. Therefore, a higher neutralization number indicates a higher acidity level, which can guide decisions regarding the oil's suitability for specific applications or the need for refining.