A good quality oil used in main propulsion...

Question 1 / 270705eccefa1bacbc34ba4d4721c

Question 1 of 270705eccefa1bacbc34ba4d4721c

A good quality oil used in main propulsion engine lubrication systems should be __________.

Question 1 of 27070

A good quality oil used in main propulsion engine lubrication systems should be __________.

🔍 Key Concepts

• lubricating oil properties in diesel/main propulsion engines • how oil interacts with water and contaminants in an engine system • what happens when oil chemically degrades (oxidation, saponification, emulsification)

💭 Think About

• Consider which option describes a property that helps the oil keep doing its job over long periods inside a hot, working engine. • Think about whether marine engine lube oil actually needs some additives, or if it should be completely pure, and why. • Ask yourself what you want the oil to do if small amounts of water get into the system: mix permanently, separate out, or react chemically?

✅ Before You Answer

• Check which choices describe damage or breakdown of the oil versus stability and protection. • Verify whether modern marine lubricants are normally additive-free or additive-treated for better performance. • Look for the option that would help the oil be reusable and easily cleaned in a separator or purifier when contaminated with water.

Question 1 of 27070

A good quality oil used in main propulsion engine lubrication systems should be __________.

free from all chemical additives

quickly chemically oxidized

resistant to permanent emulsification

readily saponified with water