A.removing the oxygenB.cooling the fire below the ignit……

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

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

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

单项选择题The outlet at a fire hydrant may be positioned anywhere from horizontal to pointing（）.

A.45°upward
B.vertically upward
C.vertically downward
D.all of the above

单项选择题The muster list shows each rig hand’s muster station，his duties during abandonment，basic instructions，and（）.

A.all emergency signals
B.instructions for lowering the survival craft
C.the time each weekly drill will be held
D.work schedule