De-energizes the charged mist effect
Maintains a positive pressure on the vent header to cool the flammable vapors
Inert gas filters out the flammable vapors from the cargo tank spaces
Inert gas dilutes the flammable vapor and air concentrations to keep them below the lower explosive limit
第1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2题：
Which of the listed functions is the purpose of a gas scrubber in an inert gas generation system ________．
A.Cools the inert gas
B.Maintains the oxygen content at 5% by volume
C.Drains off static electricity in the inert gas
D.Maintains the water seal on the gas main
第3题：
An inert gas system installed on a tanker is designed to ______.
A.aid in the stripping and cleaning of cargo tanks
B.increase the rate of discharge of cargo
C.force toxic and explosive fumes from a cargo tank to vent to the outside atmosphere
D.lower the oxygen levels inside cargo tanks，making explosion nearly impossible
第4题：
What is NOT a function of the scrubber of an inert gas system ________．
A.Cool the inert gas
B.Remove particulate matter like soot
C.Maintain pressure in the tanks
D.Remove chemical impurities
第5题：
The deck water seal of the inert gas system ______．
A.Cools the inert gas and prevents soot from entering the cargo tanks
B.Acts as an emergency shutdown when inlet pressures exceed the safe working pressure
C.Prevents the backflow of hydrocarbon gasses into nonhazardous areas
D.Relieves sudden large overpressures in the system
第6题：
Which method is used to supply inert gas from a flue gas system to the cargo tanks?
A.Exhaust gas pressure from the stack
B.High capacity fan
C.Inert gas compressor
D.Natural aspiration
第7题：
The blowers of an inert gas generation system aboard a tanker，will be automatically secured if ______．
A.Normal water supply at the water seal is lost
B.The temperature of the inert gas being delivered to the cargo tanks is more than 150℉
C.The cooling water supply to the scrubbers is lost
D.All of the above
第8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9题：
The fresh air intake of the inert gas system ______，
A.Prevents the flue gas from falling below 3% content of oxygen
B.Allows the inert gas piping to be used for gas freeing the tanks
C.Opens when there is excessive vacuum on the deck water seal
D.Enables outside air to mix with and cool hot flue gasses
第10题：
Using an inert gas system on a tanker has which advantage（s）________．
A.Provides for faster loading
B.Lowers oxygen content in the tank
C.Provides better fuel economy
D.All of the above