You are releasing carbon dioxide gas (CO2)...

Question 1 / 2707066636eec28f7522a1c51c7f2

Question 1 of 2707066636eec28f7522a1c51c7f2

You are releasing carbon dioxide gas (CO2) into an engine compartment to extinguish a fire. In which situation will the CO2 be most effective?

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Question 1 of 27070

You are releasing carbon dioxide gas (CO2) into an engine compartment to extinguish a fire. In which situation will the CO2 be most effective?

🔍 Key Concepts

• CO2 fixed fire-fighting systems and how they extinguish fires (oxygen displacement and cooling) • Importance of a sealed / closed compartment for gas-based extinguishing agents • Effect of ventilation and airflow on gas concentration in a protected space

💭 Think About

• What does CO2 need to do inside the space to put the fire out, and what happens if fresh air can easily enter? • How would opening doors, hatches, or ventilators affect the concentration of CO2 around the fire? • Which option best maintains a high concentration of CO2 around the fire for long enough to cool and smother it?

✅ Before You Answer

• Identify which choices increase air supply or ventilation to the compartment and which reduce it • Ask: In which situation will CO2 stay inside the compartment instead of leaking out? • Confirm that the chosen option allows CO2 to reach and maintain its effective concentration without being diluted by outside air

Question 1 of 27070

You are releasing carbon dioxide gas (CO2) into an engine compartment to extinguish a fire. In which situation will the CO2 be most effective?

The compartment is left open to the air

The compartment is closed and airtight

Air flow to the compartment is increased with blowers

The compartment is closed, and ventilators are opened

Question 1 / 2707066636eec28f7522a1c51c7f2

Question 1 of 2707066636eec28f7522a1c51c7f2

You are releasing carbon dioxide gas (CO2) into an engine compartment to extinguish a fire. In which situation will the CO2 be most effective?

Back

Question 1 of 27070

You are releasing carbon dioxide gas (CO2) into an engine compartment to extinguish a fire. In which situation will the CO2 be most effective?