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單項(xiàng)選擇題

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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單項(xiàng)選擇題

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

單項(xiàng)選擇題

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