A.Slow down the spread of fire by cooling adjacent structures
B.Cover the fire with foam
C.Smother the fire with a blanket or similar object
D.Break up solid objects to ensure that any deep seated fires are extinguished
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A.Automatic sprinkler system
B.Steam smothering system
C.Dry chemical system
D.Carbon dioxide system
A.It is effective in controlling fire in flowing oil such as coming from a broken fuel line
B.It absorbs heat from materials that could cause reignition
C.Most foams can be used jointly with dry chemical extinguishing agents to attack a fire by two methods of extinguishment
D.Once the surface is blanketed with foam and the fire is extinguished，no further foam is required
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
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
最新試題
The straight stream capability of an all-purpose nozzle is used in fighting a class A fire to（）.
What is meant by the term overhaul in firefighting?（）
Under the regulations for cargo vessels，which statement is TRUE concerning fireman’s outfits?（）
There are two disadvantages to CO2 pump as a firefighting agent. One of these is the limited quantity available，and the other is（）.
There is a fire aft aboard your vessel. To help fight the fire，you should（）.
What is an advantage of using foam in fire fighting?（）
The supply of carbon dioxide used in the fixed extinguishing system aboard a cargo vessel MUST be at least sufficient for（）.
The spread of fire is prevented by（）.
To lubricate the swivel or remove corrosion from a fire hose coupling，you should use（）.
To prevent the spread of fire by conduction you should（）.