單項選擇題When must a dry chemical fire extinguisher be recharged?（）

A.After each use
B.When the air temperature exceeds 90°F
C.Every 6 months
D.Every 12 months


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1.單項選擇題When loading or discharging dry mud or cement，crew members should use facial respirator masks and（）.

A.goggles
B.ear plugs
C.soft-soled boots
D.fireman's outfit

2.單項選擇題When joining the female coupling of the fire hose to the male outlet of the hydrant，you should make sure that the（）.

A.threads are lubricated
B.nozzle is attached to the hose
C.female coupling has a gasket
D.hose is led out

3.單項選擇題When inspecting a tank barge to see that it has all the required fire extinguishers and other safety items aboard，which of the following is the best source for determining what is required?（）

A.The supervisor in charge of the dock to which the barge is tied up
B.Part 38 of the Rules and Regulations for Tankers
C.The Certificate of Inspection of the barge
D.The local fire marshal

4.單項選擇題When fire pumps are used for other than firefighting service，each pipe connecting the other service (except for branch lines used for deck washing) must have a（）.

A.check valve installed in the line
B.shut off valve at a manifold near the pump
C.quick disconnect union within ten feet of the pump
D.regulator in the line set at 125 psi

5.單項選擇題When fighting an oil or gasoline fire in the bilge，which of the following should NOT be used?（）

A.Foam
B.Solid stream water nozzle
C.All-purpose nozzle
D.Carbon dioxide