单项选择题
When possible，what is the FIRST step in fighting an engine fuel-pump fire which results from a broken fuel line?（）
A.Secure all engine room doors，hatches，and vents
B.Close the fuel line valve
C.Check the spread of the fire with foam
D.Cast the barge off the wharf
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相关考题
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单项选择题
When must a dry chemical fire extinguisher be recharged?（）
A.After each use
B.When the air temperature exceeds 90°F
C.Every 6 months
D.Every 12 months -
单项选择题
When loading or discharging dry mud or cement，crew members should use facial respirator masks and（）.
A.goggles
B.ear plugs
C.soft-soled boots
D.fireman's outfit -
单项选择题
When joining the female coupling of the fire hose to the male outlet of the hydrant，you should make sure that the（）.
A.threads are lubricated
B.nozzle is attached to the hose
C.female coupling has a gasket
D.hose is led out
