Prolonged operation of a diesel engine with...

Question 1 / 270705eccefa2bacbc34ba4d47a48

Question 1 of 270705eccefa2bacbc34ba4d47a48

Prolonged operation of a diesel engine with a closed cooling water system at lower than normal designed operating temperatures can __________.

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Question 1 of 27070

Prolonged operation of a diesel engine with a closed cooling water system at lower than normal designed operating temperatures can __________.

🔍 Key Concepts

• Diesel engine cooling water systems and why maintaining proper operating temperature is important • Effects of low combustion temperature on fuel residues, sulfur in fuel, and cylinder liner condition • Relationship between temperature and lube oil viscosity

💭 Think About

• Think about what happens inside a cylinder when the metal surfaces run colder than designed: how does that affect combustion products on those surfaces? • Which of the options would most likely be associated with incomplete combustion and the presence of sulfur in fuel oil? • Consider whether cooler operation would make lube oil thinner or thicker, and whether that matches any of the options.

✅ Before You Answer

• Verify what happens to viscosity of oil when temperature goes down • Recall what compounds form when sulfur in fuel combines with water at low metal temperatures • Consider whether operating at lower than normal temperature would logically increase power output, or tend to reduce efficiency instead

Question 1 of 27070

Prolonged operation of a diesel engine with a closed cooling water system at lower than normal designed operating temperatures can __________.

increase power output

decrease lube oil viscosity

eliminate fuel knock

cause sulfuric acid formation

Question 1 / 270705eccefa2bacbc34ba4d47a48

Question 1 of 270705eccefa2bacbc34ba4d47a48

Prolonged operation of a diesel engine with a closed cooling water system at lower than normal designed operating temperatures can __________.

Back

Question 1 of 27070

Prolonged operation of a diesel engine with a closed cooling water system at lower than normal designed operating temperatures can __________.