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 does the term head mean when applied to a fire pump?（）
The wooden plug inserted in the vent of a damaged tank of a ship should be removed in case it is decided to（）.
To lubricate the swivel or remove corrosion from a fire hose coupling，you should use（）.
There is a fire in the crew’s quarters of your vessel. You should（）.
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（）.
Weight is considered during the periodic required inspection and servicing of（）.
To remedy a leaking fire hose connection at the hydrant，secure the valve and（）.
What is meant by the term overhaul in firefighting?（）
What is an advantage of using foam in fire fighting?（）