labeled empty and recharged as soon as possible
replaced in its proper location if weight loss is no more than 25%
replaced in its proper location regardless of weight
replaced in its proper location if weight loss is no more than 15%
第1题：
The most effective way of applying carbon dioxide from a portable extinguisher to a fire is by ______．
A.Forming a cloud cover over the flames
B.Directing the gas at the base of the flames in a slow sweeping motion
C.Discharging the carbon dioxide into the heart of the flames
D.Bouncing the discharge off an adjacent bulkhead just above the burning surface
第2题：
A foam-type portable fire extinguisher is most useful in fighting a fire in ______.
A.generators
B.oil drums
C.the bridge controls
D.combustible metals
第3题：
Portable carbon dioxide fire extinguishers should be sent ashore to be recharged
A.when the remaining charge volume is less than 90 percent of the required volume
B.at each inspection for certification
C.at each annual inspection
D.when the weight loss exceeds 10% of weight of charge
第4题：
replaced in its proper location if weight loss is no more than 15%
replaced in its proper location if weight loss is no more than 25%
labeled empty and recharged as soon as possible
labeled empty and replaced in its proper location regardless of weight
第5题：
An engine compartment gasoline fire requires which type of extinguisher?______.
A.Carbon dioxide
B.Dry chemical
C.Foam
D.All of the above
第6题：
______, as the chemical extinguisher agent, should be used for an electric fire.
A.dry chemical or foam
B.foam or soda acid
C.carbon dioxide or foam
D.carbon dioxide or dry chemical
第7题：
A portable foam (stored-pressure type) fire extinguisher would be most useful in combating a fire in ______.
A.generators
B.oil drums
C.the bridge controls
D.combustible metals
第8题：
A squeeze-grip type carbon dioxide portable fire extinguisher has been partially discharged.It should be ______.
A.replaced in its proper location if weight loss is no more than 15%
B.replaced in its proper location if weight loss is no more than 25%
C.labeled empty and recharged as soon as possible
D.labeled empty and replaced in its proper location regardless of weight
第9题：
Batten down the engine room
start the fire pump
apply carbon dioxide to the fire
shut off the fuel supply
第10题：
at the base of the flames
at the center of the flames
to the lee side of the flames
over the tops of the flames