A.Length of the discharge pipe
B.Height of the discharge pipe
C.Difference between the discharge and suction pressures
D.Sum of discharge and suction pressures
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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
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
最新試題
What does blowing tubes accomplish?（）
What is NOT a characteristic of carbon dioxide fire-extinguishing agents?（）
The sprinkler system of a survival craft is used to（）.
The spread of fire is NOT prevented by（）.
What is meant by the term overhaul in firefighting?（）
There are two disadvantages to CO2 pump as a firefighting agent. One of these is the limited quantity available，and the other is（）.
What is required in addition to the heat，fuel，and oxygen of the fire triangle to have a fire?（）
What does the term head mean when applied to a fire pump?（）
The spread of fire is prevented by（）.
What are the most important reasons for using water fog to fight fires?（）