单项选择题
A.replace the gasket in the male coupling B.reduce fire pump pressure C.replace the gasket in the female coupling D.rethread the male coupling
To prevent the spread of fire by conduction you should（...
单项选择题To prevent the spread of fire by conduction you should（）.
A.cool the bulkheads around the fire B.remove combustibles from direct exposure C.close all openings to the area D.shut off all electric power
To lubricate the swivel or remove corrosion from a fire...
单项选择题To lubricate the swivel or remove corrosion from a fire hose coupling，you should use（）.
A.glycerine B.graphite C.kerosene D.fresh water and soap
To determine if a CO2 fire extinguisher is fully charge...
单项选择题To determine if a CO2 fire extinguisher is fully charged，you would（）.
A.Operate the trigger valve B.Weigh the extinguisher C.Test with a pressure gauge D.Read the date of last test
