When using a high-velocity fog stream in a...

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Question 1 of 2066636eec28f7522a1c51d052

When using a high-velocity fog stream in a passageway, the possibility of a blow back must be guarded against. Blow back is most likely to occur when __________.

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Question 1 of 20

66636eec28f7522a1c51d052

When using a high-velocity fog stream in a passageway, the possibility of a blow back must be guarded against. Blow back is most likely to occur when __________.

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🔍 Key Concepts

• High-velocity fog stream behavior in confined spaces • How steam, heat, and smoke move in a passageway with limited openings • Effect of openings/vents on pressure and flow direction in a fire situation

💭 Think About

• Think about what happens to steam and hot gases when a strong fog stream is pushed into a long, confined passageway: where can that pressure and heat go? • Which choice describes a situation where pressure and products of combustion are most likely to be forced back toward the nozzle team? • Which options describe issues with the hose/nozzle itself versus conditions in the compartment or passageway?

✅ Before You Answer

• Identify which option best describes confined space with limited or no outlet for steam and hot gases. • Eliminate any choices that deal mostly with water pressure in the hose rather than the movement of heat/smoke/steam. • Consider how additional openings (vents, doors, hatches) would change the chance of hot gases and steam coming back toward you.

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Question 1 of 2066636eec28f7522a1c51d052

When using a high-velocity fog stream in a passageway, the possibility of a blow back must be guarded against. Blow back is most likely to occur when __________.

Back

Question 1 of 20

66636eec28f7522a1c51d052

When using a high-velocity fog stream in a passageway, the possibility of a blow back must be guarded against. Blow back is most likely to occur when __________.

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed