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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单项选择题

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

A.glycerine
B.graphite
C.kerosene
D.fresh water and soap

单项选择题

A.Operate the trigger valve
B.Weigh the extinguisher
C.Test with a pressure gauge
D.Read the date of last test