单项选择题
A.removing the oxygen B.cooling the fire below the ignition temperature C.removing combustible material D.diluting combustible vapors
The primary function(s) of an automatic sprinkler syste...
单项选择题The primary function(s) of an automatic sprinkler system is(are) to（）.
A.extinguish the fire which triggers it B.limit the spread of fire and control the amount of heat produced C.protect people in the areas which have sprinkler heads D.alert the crew to the fire
The preferred type of pollution control for oil spills ...
单项选择题The preferred type of pollution control for oil spills on the water is(are) （）.
A.straw B.booms C.skimmers D.chemical dispersants
The preferred agent used in fighting a helicopter crash...
单项选择题The preferred agent used in fighting a helicopter crash fire is（）.
A.CO2 B.dry chemical C.water D.foam
