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
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 required in addition to the heat，fuel，and oxygen of the fire triangle to have a fire?（）
What are the most important reasons for using water fog to fight fires?（）
What is an advantage of using foam in fire fighting?（）
There is a fire aft aboard your vessel. To help fight the fire，you should（）.
To lubricate the swivel or remove corrosion from a fire hose coupling，you should use（）.
The straight stream capability of an all-purpose nozzle is used in fighting a class A fire to（）.
What is best suited for fighting a fire in a ballast control room?（）
There is a fire in the crew’s quarters of your vessel. You should（）.
The type of extinguisher which should be used for an electricity fire is（）.