A.is a finer，more diffuse water spray than low-velocity fog
B.requires that the water pressure be no greater than 60 psi
C.produces an effective fog pattern no more than 6 feet beyond the nozzle
D.extinguishes a fire by absorbing heat and reducing the supply of oxygen
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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.Fires in electrical equipment
B.Flammable oils and greases
C.Class A fires in ordinary combustibles
D.Materials containing their own oxygen
A.cooling
B.smothering
C.shielding of radiant heat
D.breaking the chain reaction
A.breaking the chain reaction
B.smothering the fire
C.cooling the fire
D.coating the fuel with a nonflammable surface
A.base of the equipment
B.top of the equipment
C.power source
D.source of the fire
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Fusible-link fire dampers are operated by（）.
Gas masks（）.
Fire extinguishers on inspected vessels are numbered by size I through V，with I being（）.
Fixed CO2 systems would not be used on crew’s quarters or（）.
Foam-type portable fire extinguishers are most useful in combating fires involving（）.
Halon extinguishers used on a class C fire should be directed at the（）.
Halon extinguishes fire primarily by（）.
Fire extinguishing agents used on Class C fires must be（）.
How do you operate a portable CO2 fire extinguisher?（）.
Fire fighting equipment requirements for a particular vessel may be found on the（）.