A fire of escaping liquefied flammable gas is best extinguished by ______.
A.cooling the gas below the ignition point
B.cutting off the supply of oxygen
C.stopping the flow of gas
D.interrupting the chain reaction
第1题：
An inert gas system on a tanker should be used to ______.
A.prevent the generation of flammable or combustible gas in tanks
B.blow out cargo lines to prevent the build up of gas concentrations
C.dilute tank atmospheres to keep gas concentrations below the lower explosive limit
D.prevent fires in the pumproom by continually displacing flammable vapors
第2题：
If you have a liquefied flammable gas barge in tow，which is NOT required of you with respect to the barge and its cargo ________．
A.Make periodic inspections of bilges
B.Keep the barge under constant surveillance
C.Have a properly certificated tankerman or at least one licensed officer on board the towing vessel
D.Verify ullage readings
第3题：
Any open flame can’t exist in this business building
A.Yes. We’ve removed all the flammable gas.
B.Yes. We’ve searched everywhere for flammable liquid
C.Yes. All the flammable liquid and gas have been removed already.
D.Yes. We’ve removed all the liquid, gas and wood which can be burned
第4题：
A galley grease fire on the stove may be extinguished using______．
A.water
B.foam
C.the range hood extinguishing system
D.fire dampers
第5题：
You are testing a tank that contained gasoline by using a combustible gas indicator．Under testing，the tank sample caused the needle to move rapidly to 100 on the dial then fall to zero．What is the concentration of flammable gas ________．
A.Less than the flammable range
B.Within the flammable range
C.Over the flammable range
D.The explosimeter is defective and giving a false reading
第6题：
How does an inert gas system on a tanker function to prevent explosions in cargo tanks?
A.De-energizes the "charged mist" effect
B.Maintains a positive pressure on the vent header to cool the flammable vapors
C.Inert gas filters out the flammable vapors from the cargo tank spaces
D.Inert gas dilutes the flammable vapor and air concentrations to keep them below the lower explosive limit
第7题：
The primary hazard of liquefied petroleum gas and liquefied natural gas is ______．
A.Pressure
B.Toxicity
C.Temperature
D.Flammability
第8题：
A、Liquefied NG Gas
B、Liquefied Natural Gas
C、Liteer Natural Gas
D、Liquified Night Gas
第9题：
The engine in a covered lifeboat is fueled with ______．
A.Kerosene
B.Unleaded gasoline
C.Diesel oil
D.Liquefied gas
第10题：
Argon is classified as a ______.
A.corrosive
B.flammable gas
C.flammable liquid
D.nonflammable gas