Fire behaviour, protective equipment and breathing apparatus, hose, ladders, ventilation, rescue, hazardous materials awareness, and fire alarm system fundamentals.
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A tamper switch on a sprinkler control valve operates because someone has partly closed the valve. What signal should the control unit show?
Supervisory
Alarm
Trouble
Evacuation
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A. Supervisory
A valve that is off-normal is a supervisory condition: the sprinkler system may not work, but there is no fire. It is not a trouble signal, because the alarm system's own wiring and power are fine.
Reference: NFPA 72 topic: supervisory signal initiating devices
Class K extinguishers and agents are intended for fires involving
Combustible metals such as magnesium
Energized electrical switchgear
Gasoline and other fuel spills
Cooking oils and fats in kitchens
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D. Cooking oils and fats in kitchens
Class K is cooking media: vegetable and animal oils and fats in commercial cooking appliances. Gasoline is a Class B fuel; hot cooking oil gets its own class because it re-ignites easily and needs a saponifying wet agent.
Reference: Firefighter I: classification of fires
A responder has a four-digit ID number from a placard. Which section of the ERG is used to look it up?
The blue-bordered pages
The orange-bordered pages
The green-bordered pages
The yellow-bordered pages
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D. The yellow-bordered pages
The yellow section lists materials by ID number. The blue section lists them alphabetically by name, the orange section holds the response guides and the green section gives isolation and protective action distances.
A ladder is raised with 24 ft of its length between the ground and the point where it rests on the wall. For the correct climbing angle, how far from the wall should the butt be?
4 ft
6 ft
8 ft
12 ft
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B. 6 ft
The butt is placed about one quarter of the working length from the building: 24 / 4 = 6 ft. Using one third gives 8 ft, which makes the angle too flat.
A firefighter's low-air alarm sounds while working inside. The correct action is to
Finish the task first and then walk out alone
Skip-breathe and stay to help the rest of the crew
Switch the alarm off and watch the gauge instead
Leave the hazard area at once with the crew
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D. Leave the hazard area at once with the crew
The low-air alarm means only the reserve is left, so the firefighter and partner exit immediately. Nobody leaves alone, and controlled breathing is an emergency technique for someone who is trapped, not a way to stay and work.