单项选择题
Portable fire extinguishers must be provided for the cargo tank area of an unmanned tank barge（）.
A.only when fully loaded
B.if one or more tanks are full
C.when transferring cargo
D.only when the barge is being towed
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相关考题
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单项选择题
Portable CO2 fire extinguishers should NOT be used to inert a space containing flammable liquids due to the danger of（）.
A.the CO2 being inhaled by personnel
B.reflash of burning liquids
C.vapor condensation on the extinguisher
D.the discharge causing a static spark -
单项选择题
Overhauling a fire in the living quarters on a vessel must include（）.
A.opening dead spaces to check for heat or fire
B.evacuation of the vessel
C.sounding the all clear signal
D.operation of the emergency generator -
单项选择题
Operation of the valve control release on a fixed CO2 system must immediately（）.
A.release CO2 to the protected space
B.secure all mechanical ventilation in the protected space
C.sound the rig's general alarm signal for a fire
D.sound an alarm in the ballast control room
