单项选择题
After extinguishing a paint locker fire using the fixed CO2 system，the next action is to have the space（）.
A.opened and burned material removed
B.left closed with vents off until all boundaries are cool
C.checked for oxygen content
D.doused with water to prevent reflash
相关考题
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单项选择题
After extinguishing a fire with CO2，it is advisable to（）.
A.use all CO2 available to cool the surrounding area
B.stand by with water or other agents
C.thoroughly ventilate the space of CO2
D.jettison all burning materials -
单项选择题
According to the regulations，what fire safety control feature is required in quick-closing shut off valves?（）
A.Electrical cut off switch
B.A fusible link
C.Manual cut off switch
D.A water spray actuator -
单项选择题
A vessel is constructed with a steel hull and an aluminum superstructure. Which statement is TRUE?（）
A.The aluminum will provide greater resistance to the spread of fire by conduction
B.The aluminum structure is usually attached to a steel coaming by a method that insulates the two metals
C.If the superstructure is stressed，an aluminum structure requires additional expansion joints to prevent fracture
D.The steel at the area of the aluminum-to-steel connection must be closely checked for galvanic corrosion
