单项选择题
Weight is considered during the periodic required inspection and servicing of（）.
A.CO2 (carbon dioxide) fire extinguishers
B.foam fire extinguishers
C.water (stored pressure) fire extinguishers
D.All of the above
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单项选择题
Water fog from an all-purpose nozzle may be used to（）.
A.fight an electrical fire
B.fight a magnesium fire
C.eliminate smoke from a compartment
D.All of the above -
单项选择题
Ventilation systems connected to a compartment in which a fire is burning are normally closed to prevent the rapid spread of the fire by（）.
A.convection
B.conduction
C.radiation
D.spontaneous combustion -
单项选择题
Under the regulations for cargo vessels，which statement is TRUE concerning fireman’s outfits?（）
A.If a vessel carries two outfits，they may be stored in the same location
B.Each fireman's outfit shall contain a flame safety lamp of an approved type
C.Each fireman's outfit shall contain a fresh-air breathing apparatus
D.All of the above
