If the jacket water temperature of an...

Question 1 / 270705eccefa2bacbc34ba4d47a3f

Question 1 of 270705eccefa2bacbc34ba4d47a3f

If the jacket water temperature of an operating diesel engine suddenly rises above normal, the cause can be attributed to __________.

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Question 1 of 27070

If the jacket water temperature of an operating diesel engine suddenly rises above normal, the cause can be attributed to __________.

🔍 Key Concepts

• Closed freshwater (jacket water) cooling system versus raw water (sea water) cooling system on a diesel engine • How heat exchangers transfer heat from jacket water to sea water • Typical effects of flow restriction or surface damage in the cooling circuit on operating temperature

💭 Think About

• Which choice would most directly reduce the engine’s ability to remove heat from the jacket water, causing a quick temperature rise during operation? • For each option, decide whether it would tend to improve cooling, not affect it much, or restrict cooling flow/heat transfer. • Think about which component, if blocked or impaired, would immediately affect the volume of cooling water reaching the heat exchanger.

✅ Before You Answer

• Identify which options affect the raw water flow into the cooling system versus the jacket water chemistry or level. • Consider whether overfilling or chemical treatment would cause a sudden, sharp temperature rise, or more gradual/indirect effects. • Ask: Which condition would you expect to see together with reduced sea water discharge flow at the overboard outlet?

Question 1 of 27070

If the jacket water temperature of an operating diesel engine suddenly rises above normal, the cause can be attributed to __________.

an overfilled expansion tank

excess chromate treatment of the jacket water

a clogged raw water sea suction

cavitation erosion of the heat exchanger tubes

Question 1 / 270705eccefa2bacbc34ba4d47a3f

Question 1 of 270705eccefa2bacbc34ba4d47a3f

If the jacket water temperature of an operating diesel engine suddenly rises above normal, the cause can be attributed to __________.

Back

Question 1 of 27070

If the jacket water temperature of an operating diesel engine suddenly rises above normal, the cause can be attributed to __________.