Which of the following conditions should be...

Which of the following conditions should be...

Question 1 of 270705eccefa1bacbc34ba4d47219

Which of the following conditions should be used to support the need to change the lube oil when there has been an increase in the neutralization number?

Question 1 of 27070

Q

Which of the following conditions should be used to support the need to change the lube oil when there has been an increase in the neutralization number?

🔍 Key Concepts

• Neutralization number (TAN – Total Acid Number): what does an increase physically mean about the oil? • How viscosity of lubricating oil typically changes as it oxidizes or degrades in service. • Relative importance of viscosity change vs. cloud/floc points when deciding if oil is still suitable for service.

💭 Think About

• If the neutralization (acid) number is rising, what kind of chemical changes are occurring in the oil and additives? • Which property change, among the options, would most directly indicate that oxidation and contamination have advanced far enough to affect bearing lubrication performance? • Are cloud point and floc point usually the primary limits for deciding when to change in‑service lube oil, or are they more about selecting an appropriate oil in the first place?

✅ Before You Answer

• Verify which option directly reflects degradation from oxidation that affects film strength and bearing protection. • Confirm which property is routinely trended in lube oil analysis to decide on continued use versus oil change. • Distinguish between properties used for oil selection (cloud/floc points) and those used for condition monitoring (viscosity, TAN).