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单选题
As compared to carbon dioxide,dry chemical has which advantage?（）.
A
Cleaner
B
Effective
C
Greater range
D
More cooling effect
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单选题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
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单选题Flames from small leaks of LFG may be extinguished by（）.A
utilizing carbon dioxide or dry chemical fire extinguishersB
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单选题While moving ahead，a twin-screw ship has an advantage over a single-screw ship because （）.A
correct trim will be obtained more easilyB
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单选题Which of the following statements is true concerning carbon dioxide when used as a fire extinguishing agent?（）A
Carbon dioxide is corrosive when exposed to fireB
Carbon dioxide should be applied slowly to a large engine room fireC
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单选题An advantage of a dry chemical over a carbon dioxide fire extinguish is its（）.A
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单选题The type of extinguisher which should be used for an electricity fire is（）.A
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单选题A squeeze-grip type carbon dioxide portable fire extinguisher has been partially discharged. It should be（）.A
labeled empty and recharged as soon as possibleB
replaced in its proper location if weight loss is no more than 25%C
replaced in its proper location regardless of weightD
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单选题Carbon dioxide as a fire fighting agent has which advantage over other agents?（）.A
It causes minimal damageB
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单选题Which types of portable fire extinguishers are designed for use on electrical fires?（）A
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单选题As compared to carbon dioxide，dry chemical has which advantage?（）.A
CleanerB
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Greater rangeD
More cooling effect
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单选题When used to fight fire，carbon dioxide（）.A
is effective if used promptly on an oil fireB
has a greater cooling effect than waterC
is lighter than airD
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单选题On a ship，a fixed carbon dioxide or other approved system must be installed（）.A
where oil or chemical drums are storedB
in all battery storage locationsC
in paint lockersD
in all of the above locations
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单选题Why should you wear a self-contained breathing apparatus before entering the engine room after the fixed CO2 system has been discharged to combat a major fire?（）A
Because carbon dioxide dilutes the oxygen concentration in the atmosphere and may cause asphyxiationB
Because carbon dioxide breaks down in a fire into carbon monoxide which may cause blood poisoning in the person breathing this gasC
Because carbon dioxide is a colorless and odorless gas that becomes highly toxic in the presence of high temperatures and will quickly incapacitate a person exposed to this gasD
This action is unnecessary as carbon dioxide is not poisonous nor toxic but is a relatively harmless gas
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单选题Dry chemical fire extinguishers are effective on which type(s) of fire?（）A
Burning oilB
ElectricalC
PaintD
All of the above
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单选题（），as the chemical extinguisher agent，should be used for an electric fire.A
dry chemical or foamB
foam or soda acidC
carbon dioxide or foamD
carbon dioxide or dry chemical
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