A large, low-speed, crosshead, main...

Question 1 / 270705eccefa2bacbc34ba4d478f1

Question 1 of 270705eccefa2bacbc34ba4d478f1

A large, low-speed, crosshead, main propulsion diesel engine using residual fuel oils must have a cylinder oil having a __________.

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Question 1 of 27070

A large, low-speed, crosshead, main propulsion diesel engine using residual fuel oils must have a cylinder oil having a __________.

🔍 Key Concepts

• TBN (Total Base Number) and what it indicates about a cylinder oil • How sulfur and acids in residual fuel oils affect cylinder liner corrosion • Why slow-speed crosshead engines using residual fuel need a particular alkaline reserve in their cylinder oil

💭 Think About

• Think about what happens when high-sulfur residual fuel burns and what kind of byproducts contact the cylinder walls. • Ask yourself: does the cylinder oil for this type of engine need to neutralize acids or just provide basic lubrication? • Consider which property in the choices is directly related to protecting against corrosion in cylinders burning residual fuels.

✅ Before You Answer

• Verify which option refers to an oil’s ability to neutralize acidic byproducts. • Identify which property is measured or reflected by TBN (Total Base Number) in lubricating oils. • Eliminate options that are mainly about handling/storage characteristics (like low flash point or pour point) rather than neutralizing acidity in the cylinder.

Question 1 of 27070

A large, low-speed, crosshead, main propulsion diesel engine using residual fuel oils must have a cylinder oil having a __________.

low TBN value

high alkaline reserve

low flash point

high pour point