Using an inert gas system on a tanker has which advantage(s)

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

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

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

When a non-volatile cargo is carried in a tank that has not been previously gas freed，then that tank shall ______．

A.be purged with hydrocarbon gas prior to loading

B.be gas-freed after loading operations

C.not be maintained in an inert condition

D.be maintained in an inert condition

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

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

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

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

What is the major function of the deck water seal in an inert gas system ________．

A.Relieve excessive overpressures in the system

B.Isolate hazardous from nonhazardous areas

C.Prevent the flow of inert gas into closed tanks

D.Remove any leftover water or soot after the gas has been scrubbed

Which statement about the inert gas system is TRUE ________．

A.Boiler soot blowers should never be used when the IG system is operating

B.The boiler will produce the best quality of flue gas for the IG system when the boiler load is very light

C.The boiler will produce the most quantity of flue gas for the IG system when the boiler load is very light

D.Flue gas with excessive oxygen content is de-oxygenated in the scrubber