A. the discharge valve is open B. the control box glass is broken C. pressure from the control cylinders is detected D. the control cylinders have been completely discharged
A. kept in nonmetal containers B. discarded as soon as possible C. cleaned thoroughly for reuse D. kept in the paint locker
A. contains 15 pounds of CO<sub>2</sub> B. weighs 15 pounds when full of CO<sub>2</sub> C. has 15 pounds of pressure at the nozzle D. weighs 15 pounds when empty
A. at the top of the flames B. at the base of the fire near the edge C. in short quick bursts D. toward the upwind side of the fire
A. 8the heat of a fire melting the link B. a break-glass and pull-cable system C. electrical controls on the bridge D. a mechanical arm outside the vent duct
A. it provides cooling as a secondary effect B. works well on extinguishing electrical fires C. can be used to combat combustible metal fires D. All of the above
A. cooling B. chemical action C. smothering D. inerting the air
A. salt water and a wire brush B. caustic soap C. mild soap and fresh water D. a holystone
A. are made of bronze，brass，or soft alloy metals B. should be painted red in order to identify hose lengths C. are specially hardened to prevent crushing D. should be greased frequently
A. crewman's duty list B. Certificate of Inspection C. shipping articles D. muster list
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