A.It is MOST effective on very hot oil fires where the temperatures of the liquid exceed 100°C (212°F)
B.Most foams can be used with dry chemicals to attack a fire by two methods
C.Foam is effective on combustible metal fires
D.Foam can be made with seawater or fresh water
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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
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
最新試題
What is meant by the term overhaul in firefighting?（）
What is an advantage of using foam in fire fighting?（）
The success of an indirect attack on a fire depends on the（）.
To determine if a CO2 fire extinguisher is fully charged，you would（）.
What is NOT listed on the metallic name plate required to be attached to hand portable fire extinguishers?（）
Under the Carriage of Goods by Sea Act of 1936，a vessel will be liable for damage to a cargo when the damage arises out of（）.
What is the MOST important consideration when determining how to fight an electrical fire?（）
Water fog from an all-purpose nozzle may be used to（）.
Weight is considered during the periodic required inspection and servicing of（）.
The straight stream capability of an all-purpose nozzle is used in fighting a class A fire to（）.