Firefighter Math · Question
A fire hose has a friction loss of 15 PSI per 100 feet. If a hose lay is 400 feet, what is the total friction loss?
Since the friction loss is 15 PSI per 100 feet, for a 400-foot hose, the loss is (400 feet / 100 feet) * 15 PSI = 4 * 15 PSI = 60 PSI.
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Question: A fire hose has a friction loss of 15 PSI per 100 feet. If a hose lay is 400 feet, what is the total friction loss?
Answer options:
- 45 PSI ✅ 60 PSI
- 75 PSI
- 100 PSI
Correct answer: 60 PSI
Explanation: Since the friction loss is 15 PSI per 100 feet, for a 400-foot hose, the loss is (400 feet / 100 feet) * 15 PSI = 4 * 15 PSI = 60 PSI.
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