Answers
Which is a characteristic of smooth bore nozzles?
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A. Prone to clogging with debris
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B. Cannot be used to apply compressed air foam
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C. Cannot be adjusted to different stream patterns
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D. Operate at higher nozzle pressures than fog nozzles - correct answer C. Cannot be adjusted to different
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stream patterns h
How is the rate of discharge for a manually adjustable fog nozzle changed?
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A. Pushing the bale forward or backward slowly
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B. Rotating the nozzle tip to choose a wider or narrower pattern
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C. Rotating the selector ring to the desired GPM (L/min) setting
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D. Signaling the pump operator to reduce or increase the pressure - correct answer C. Rotating the selector
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ring to the desired GPM (L/Min) setting
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Advancing an uncharged hose line down a flight of stairs is only recommended when:
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, A. The fire is minor or not present
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B. There is an immediate need for water
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C. The primary search has been completed
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D.There are at least four firefighters on the hoseline team - correct answer A. The fire is minor or not present
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Hand line streams have flows that discharge:
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A. Less than 40 GPM ( 160 L/min)
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B. From 25 to 300 GPM ( 100 to 1 200L/min)
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C. From 40 to 350 GPM (160 to 1 400L/min)
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D. More than 350 GPM ( 1 400L/min) - correct answer From 40 to 350 GPN (160 to 1 400L/min
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Which type of hose stream is created by specialized nozzles such as cellar nozzles, piercing nozzles, or chimney
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nozzles?
A. Fog stream
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B. Solid stream
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C. Broken stream
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D. Straight stream - correct answer C. Broken stream
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What is caused by friction loss?
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A. Increased nozzle reaction
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B. Decreased nozzle reaction
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C. Lower water pressure at the pump
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D. Lower water pressure at the nozzle - correct answer D. Lower water pressure at the nozzle
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Class a foam acts as a surfactant, which means that it:
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