Which of the following is an indication that...

Question 1 / 270705eccefa2bacbc34ba4d47919

Question 1 of 270705eccefa2bacbc34ba4d47919

Which of the following is an indication that diesel oil contamination is present in the main engine lube oil system?

Question 1 of 27070

Which of the following is an indication that diesel oil contamination is present in the main engine lube oil system?

🔍 Key Concepts

• Effect of mixing diesel fuel with lube oil on viscosity (thickness) of the oil • Meaning of octane number vs cetane number and which one applies to diesel engines • How contamination might affect pump discharge pressure in a lube oil system

💭 Think About

• If a thin liquid (diesel) is mixed with a thicker liquid (lube oil), what happens to the overall viscosity? • Are octane numbers used to rate gasoline or diesel fuel? Are cetane numbers used for gasoline or diesel fuel? • If the lube oil becomes thinner, would the pump have an easier or harder time moving it, and how might that affect discharge pressure?

✅ Before You Answer

• Verify which property (viscosity or pump discharge pressure) would change first and most noticeably when lube oil is diluted with diesel • Confirm whether octane or cetane is the correct rating term for diesel fuel quality • Ensure the chosen option directly reflects the physical effect of a lighter fuel contaminating a heavier lubricating oil

Question 1 of 27070

Which of the following is an indication that diesel oil contamination is present in the main engine lube oil system?

Lube oil viscosity has decreased

Octane number is increased.

Cetane number has decreased.

Increase in lube oil pump discharge pressure.

Question 1 / 270705eccefa2bacbc34ba4d47919

Question 1 of 270705eccefa2bacbc34ba4d47919

Which of the following is an indication that diesel oil contamination is present in the main engine lube oil system?

Back

Question 1 of 27070

Which of the following is an indication that diesel oil contamination is present in the main engine lube oil system?