On a cargo ship equipped with a combination...

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Question 1 of 2066636ef028f7522a1c520670

On a cargo ship equipped with a combination fire detection/carbon dioxide extinguishing system, the presence of fire is indicated at the cabinet simultaneously in two spaces: No.3 hold upper between decks, containing bagged coffee beans; and No.4 lower hold containing fertilizer. To combat these fires, you should __________.

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Question 1 of 20

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🔍 Key Concepts

• Fixed CO2 systems: how a three-way valve directs gas to different cargo spaces • Behavior of CO2 in enclosed spaces and why total flooding matters • Cargo properties: how bagged coffee beans and fertilizer react to CO2 vs water

💭 Think About

• Think about whether a fixed CO2 system is designed to protect one enclosed space at a time or multiple spaces at once through the same valve arrangement • Consider which cargo is more suitable for CO2 smothering, and which cargo may require water instead of CO2, based on its chemical and fire behavior • Ask yourself what could happen if CO2 is split between two spaces instead of fully flooding one compartment at a time

✅ Before You Answer

• Verify whether three-way valves on CO2 systems are normally operated one selected space at a time • Consider if any of the listed actions could lead to insufficient CO2 concentration in a space, making the system ineffective • Recall any safety concerns about applying water directly to fertilizer cargoes and how that affects your choice

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