单项选择题
To remedy a leaking fire hose connection at the hydrant，secure the valve and（）.
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
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相关考题
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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 -
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 -
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
