According to the illustrated main engine...

Question 1 of 2707066636eef28f7522a1c51f65e

According to the illustrated main engine cooling water systems drawing, which labeled heat exchangers use sea water as a cooling medium? Illustration MO-0111

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Question 1 of 27070

According to the illustrated main engine cooling water systems drawing, which labeled heat exchangers use sea water as a cooling medium? Illustration MO-0111

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🔍 Key Concepts

• Trace the sea water inlet and outlet piping from the sea chest or sea water pump symbol. • Identify which numbered components are heat exchangers (coolers) versus pumps, valves, or tanks. • Note the difference between the jacket water (fresh water) circuit and the sea water circuit and where they interact.

💭 Think About

• Starting from the sea water source, which numbered components does the sea water actually flow through before discharging overboard? • On the coolers you see, which side appears to carry sea water and which side carries engine jacket water or lube oil? • Do items 23 and 24 both see sea water, or is one of them cooled indirectly by another circuit? Carefully follow the arrows and line connections.

✅ Before You Answer

• Verify which line is the sea water line by finding the overboard discharge and following it back to the pump and sea chest. • Confirm that each number you select is actually a heat exchanger, not a pump, valve, or expansion tank. • Double‑check whether 23 and 24 are both in the sea water circuit or if one is only in the fresh‑water side before choosing your option.