A person manning a fire hose under pressure...

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Question 1 of 205eccef9ebacbc34ba4d46415

A person manning a fire hose under pressure with an all-purpose nozzle attached, should be aware that the nozzle is most difficult to control when the handle position is changed from __________.

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Question 1 of 20

5eccef9ebacbc34ba4d46415

A person manning a fire hose under pressure with an all-purpose nozzle attached, should be aware that the nozzle is most difficult to control when the handle position is changed from __________.

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🔍 Key Concepts

• Nozzle reaction and how water pressure changes when switching patterns • Difference between shut, solid stream, fog, and high-velocity fog patterns • How sudden changes in flow and pattern affect back thrust on the hose team

💭 Think About

• For each handle movement in the choices, ask yourself: does this make the stream tighter and higher energy, or wider and lower energy? • When is the change in water direction and flow rate inside the nozzle the greatest? That is when the reaction force on the firefighter will also be greatest. • Which option represents going from very little/no water flow to a very powerful, concentrated flow in the shortest instant?

✅ Before You Answer

• Identify which position means no flow vs. maximum flow. • Identify which pattern creates the strongest, straightest jet of water (this gives maximum nozzle reaction). • Consider which handle movement causes the largest, most sudden jump in nozzle reaction, not just a small adjustment.

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Study

Question 1 of 205eccef9ebacbc34ba4d46415

A person manning a fire hose under pressure with an all-purpose nozzle attached, should be aware that the nozzle is most difficult to control when the handle position is changed from __________.

Back

Question 1 of 20

5eccef9ebacbc34ba4d46415

A person manning a fire hose under pressure with an all-purpose nozzle attached, should be aware that the nozzle is most difficult to control when the handle position is changed from __________.

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