A.Eliminates unburned fuel oil residues from the firebox
B.Increases boiler efficiency
C.Flushes away mineral deposits inside the water tubes
D.Cleans soot deposits from the inside of the stack
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A.Smothers burning surfaces，organically destroys fuel
B.Cools fire and adjacent surfaces，provides protective barrier
C.Reaches areas not protected by steam or CO2 smothering systems
D.Allows fire to be attacked from leeward，saturates liquid surfaces
A.CO2 (carbon dioxide) fire extinguishers
B.foam fire extinguishers
C.water (stored pressure) fire extinguishers
D.All of the above
A.fight an electrical fire
B.fight a magnesium fire
C.eliminate smoke from a compartment
D.All of the above
A.convection
B.conduction
C.radiation
D.spontaneous combustion
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
最新試題
What is NOT a characteristic of carbon dioxide fire-extinguishing agents?（）
To remedy a leaking fire hose connection at the hydrant，secure the valve and（）.
What is required in addition to the heat，fuel，and oxygen of the fire triangle to have a fire?（）
The supply of carbon dioxide used in the fixed extinguishing system aboard a cargo vessel MUST be at least sufficient for（）.
To prevent the spread of fire by conduction you should（）.
The sprinkler system of a survival craft is used to（）.
What is NOT listed on the metallic name plate required to be attached to hand portable fire extinguishers?（）
What is an advantage of using foam in fire fighting?（）
Ventilation systems connected to a compartment in which a fire is burning are normally closed to prevent the rapid spread of the fire by（）.
What is an advantage of using foam in fire fighting?（）