A decision has been made to change out 1,000...

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Question 1 of 205eccefa1bacbc34ba4d4721a

A decision has been made to change out 1,000 gallons of lube oil in a vessel's main propulsion unit. Which of the following statements is true regarding this decision?

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Question 1 of 20

5eccefa1bacbc34ba4d4721a

A decision has been made to change out 1,000 gallons of lube oil in a vessel's main propulsion unit. Which of the following statements is true regarding this decision?

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🔍 Key Concepts

• Neutralization number (measures acidity of used lube oil) and what an increase in this number means • Normal trends of viscosity change in lube oil as it ages and is contaminated • Why oil-change decisions are usually based on more than one test result or trend

💭 Think About

• Think about what a rising neutralization number tells you about the condition of the oil and its ability to protect engine parts • Consider whether viscosity in a heavily used lube oil is more likely to increase, decrease, or stay stable over long service periods • Ask yourself if a single laboratory parameter is usually enough to justify changing a large volume of lube oil on a main propulsion unit

✅ Before You Answer

• Verify whether an increase or a decrease in the neutralization number is the usual indicator that oil is becoming too acidic • Check if long‑term lube oil monitoring programs rely on only neutralization number or on a combination of tests (viscosity, water, contaminants, metals, etc.) • Confirm the typical direction of viscosity change in used engine lube oil (does it normally go up or down with fuel dilution, shear, oxidation, or contamination?)

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Question 1 of 205eccefa1bacbc34ba4d4721a

A decision has been made to change out 1,000 gallons of lube oil in a vessel's main propulsion unit. Which of the following statements is true regarding this decision?

Back

Question 1 of 20

5eccefa1bacbc34ba4d4721a

A decision has been made to change out 1,000 gallons of lube oil in a vessel's main propulsion unit. Which of the following statements is true regarding this decision?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed