🔍 Key Concepts

• Heat balance in diesel engines – how cooling water and lube oil remove heat from the engine • Relationship between cooling water system problems and temperature indications • Which faults affect both lube oil and jacket water, versus only one system

💭 Think About

• Look at each choice and ask: would this primarily affect lube oil temperature, cooling water temperature, or both together? • Which component, if not working correctly, would reduce the ability to carry heat away from the engine overall? • Think about what happens to heat transfer if the flow of cooling water through the engine is reduced.

✅ Before You Answer

• For each option, decide if it directly changes cooling water flow or heat transfer through the engine jackets. • Check which options mainly affect oil pressure/flow but would not significantly change cooling water temperature. • Identify the option that would logically cause a simultaneous rise in both cooling water and lube oil temperatures.