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 is the most important characteristic of the extinguishing agent in fighting a class C fire?（）
Under the regulations for cargo vessels，which statement is TRUE concerning fireman’s outfits?（）
What does the term head mean when applied to a fire pump?（）
The straight stream capability of an all-purpose nozzle is used in fighting a class A fire to（）.
What is NOT listed on the metallic name plate required to be attached to hand portable fire extinguishers?（）
The wooden plug inserted in the vent of a damaged tank of a ship should be removed in case it is decided to（）.
The sprinkler system of a survival craft is used to（）.
What is an advantage of using foam in fire fighting?（）
Water fog from an all-purpose nozzle may be used to（）.
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