单项选择题

A squeeze-grip type carbon dioxide portable fire exting……

A squeeze-grip type carbon dioxide portable fire extinguisher has been partially discharged. It should be（）.

A.labeled empty and recharged as soon as possible
B.replaced in its proper location if weight loss is no more than 25%
C.replaced in its proper location regardless of weight
D.replaced in its proper location if weight loss is no more than 15%

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单项选择题A spring line is（）.

A.any wire rope used for mooring
B.a fire-warp
C.a mooring line running diagonally to the keel
D.a mooring line perpendicular to the keel

单项选择题A spanner is a（）.

A.cross connection line between two main fire lines
B.special wrench for tightening couplings in a fire hose line
C.tackle rigged to support a fire hose
D.None of the above

单项选择题A small fuel spillage has occurred during helicopter refueling. After the leak has been stopped and fire-control personnel have been notified and are standing by，the next step is to（）.

A.proceed with fueling operation
B.have helicopter move to a safer location
C.wash spilled fuel away with a flood of water
D.clean spilled fuel with rags

单项选择题A ship must have a self-contained breathing apparatus to be used as protection from gas leaking from a refrigeration unit. To meet this requirement，you may use（）.

A.a gas mask certified by the Mine Safety and Health Administration
B.the same self-contained breathing apparatus required with the fireman's outfit
C.an oxygen breathing apparatus，provided that the device has been inspected within three years
D.a portable ventilation system that will provide a complete change of air every three minutes

单项选择题A ship helicopter landing deck on which fueling operations are conducted must have a fire protection system that is capable of discharging at 100 psi pressure a foam spray of at least（）.

A.30 gallons per minute
B.40 gallons per minute
C.50 gallons per minute
D.60 gallons per minute