Since towing vessels take on fresh water...

Question 1 / 2066636eef28f7522a1c520294

Question 1 of 2066636eef28f7522a1c520294

Since towing vessels take on fresh water from shore as a source of make-up water for the closed, re-circulating cooling water systems supporting diesel engines, what property of the make-up water is most important in contributing to cooling system problems?

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🔍 Key Concepts

• Closed, re‑circulating cooling water systems and how they concentrate certain substances over time • Differences between suspended solids (like sand) and dissolved solids (like minerals in hard water) • How scale, corrosion, and fouling typically develop inside engine cooling passages

💭 Think About

• In a closed cooling system that keeps reusing the same water, what happens to materials that do NOT evaporate out with the water? • Which type of contamination is most likely to form hard deposits on heat‑transfer surfaces and inside small cooling passages? • Which option would gradually reduce heat‑transfer efficiency and be hardest to remove once it builds up?

✅ Before You Answer

• Distinguish clearly between suspended versus dissolved materials in the water • Think about which contaminant will accumulate and harden on hot metal surfaces as the system operates • Consider which factor cooling‑water treatment chemicals are most commonly designed to control in diesel engine systems

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Question 1 of 20

The degree of contamination of suspended solids, such as sand.

The amount of dissolved solids associated with mineral content.

The amount of dissolved oxygen (and other various gases).

The degree of contamination with microbiological organisms.

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Question 1 / 2066636eef28f7522a1c520294

Question 1 of 2066636eef28f7522a1c520294

Back

Question 1 of 20

66636eef28f7522a1c520294

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Be the first to share your thoughts!

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🔍 Key Concepts

💭 Think About

✅ Before You Answer

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