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单选题
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 system shutdown when the inlet pressures exceed the safe working pressure in the hazardous zone
C
prevents the backflow of hydrocarbon gasses into nonhazardous areas
D
relieves sudden large overpressures in the system
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更多 “单选题The deck water seal of the inert gas system（）.A cools the inert gas and prevents soot from entering the cargo tanksB acts as an emergency system shutdown when the inlet pressures exceed the safe working pressure in the hazardous zoneC prevents the backflow of hydrocarbon gasses into nonhazardous areasD relieves sudden large overpressures in the system” 相关考题
考题
How does an inert gas system on a tanker function to prevent explosions in cargo tanks?A.De-energizes the "charged mist" effectB.Maintains a positive pressure on the vent header to cool the flammable vaporsC.Inert gas filters out the flammable vapors from the cargo tank spacesD.Inert gas dilutes the flammable vapor and air concentrations to keep them below the lower explosive limit
考题
Which method is used to supply inert gas from a flue gas system to the cargo tanks?A.Exhaust gas pressure from the stackB.High capacity fanC.Inert gas compressorD.Natural aspiration
考题
Which of the listed functions is the purpose of a gas scrubber in an inert gas generation system ________．A.Cools the inert gasB.Maintains the oxygen content at 5% by volumeC.Drains off static electricity in the inert gasD.Maintains the water seal on the gas main
考题
After the initial cleaning of flue gas in an inert gas system the gas is passed through what device for final cleaning ________．A.ScrubberB.DemisterC.Deck water sealD.Final filter
考题
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 lostB.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 lostD.All of the above
考题
The deck water seal of the inert gas system ______．A.Cools the inert gas and prevents soot from entering the cargo tanksB.Acts as an emergency shutdown when inlet pressures exceed the safe working pressureC.Prevents the backflow of hydrocarbon gasses into nonhazardous areasD.Relieves sudden large overpressures in the system
考题
The fresh air intake of the inert gas system ______，A.Prevents the flue gas from falling below 3% content of oxygenB.Allows the inert gas piping to be used for gas freeing the tanksC.Opens when there is excessive vacuum on the deck water sealD.Enables outside air to mix with and cool hot flue gasses
考题
Upon arrival at the discharging port，the inert gas system is ______．A.Turned onB.Turning onC.Turn onD.To turn on
考题
What is NOT a function of the scrubber of an inert gas system ________．A.Cool the inert gasB.Remove particulate matter like sootC.Maintain pressure in the tanksD.Remove chemical impurities
考题
What is the major function of the deck water seal in an inert gas system ________．A.Relieve excessive overpressures in the systemB.Isolate hazardous from nonhazardous areasC.Prevent the flow of inert gas into closed tanksD.Remove any leftover water or soot after the gas has been scrubbed
考题
What alarm is NOT found on an inert gas system ________．A.Low oxygen alarmB.Low pressure alarmC.Scrubber high water level alarmD.Deck seal low water alarm
考题
Which statement about the inert gas system is TRUE ________．A.Boiler soot blowers should never be used when the IG system is operatingB.The boiler will produce the best quality of flue gas for the IG system when the boiler load is very lightC.The boiler will produce the most quantity of flue gas for the IG system when the boiler load is very lightD.Flue gas with excessive oxygen content is de-oxygenated in the scrubber
考题
The venting system shall be provided with devices to prevent the passage of ______ into the cargo tanks．A.flameB.inert gasC.airD.oil gas
考题
Each ship having an inert gas system must have a portable instruments to measure concentrations of hydrocarbon vapor in inert atmospheres and also to measure ______.A.nitrogenB.oxygenC.carbon dioxideD.water vapor
考题
单选题Each inert gas system gas main must have an automatic shut down valve at the outlet of the gas production plant. This valve must close automatically upon（）.A
cargo pump failureB
blower failureC
deck seal low water levelD
low inert gas temperature
考题
单选题During loading and discharging operations，in addition to when the cargo tanks have been properly filled，each inert gas system must be capable of maintaining a minimum gas pressure of（）.A
150 millimeters of water pressureB
125 millimeters of water pressureC
100 millimeters of water pressureD
75 millimeters of water pressure
考题
单选题The fresh air intake of the inert gas system（）.A
prevents the flue gas from falling below 3% content of oxygenB
allows the inert gas piping to be used for gas freeing the tanksC
opens when there is excessive vacuum on the deck water sealD
enables outside air to mix with and cool hot flue gasses
考题
单选题After the initial cleaning of fule gas in an inert gas system is passed through what devoce for final cleaning?（）.A
ScrubberB
DemisterC
Deck water sealD
Final filter
考题
单选题After the initial cleaning of flue gas in an inert gas system the gas is passed through what device for final cleaning?（）.A
ScrubberB
DemisterC
Deck water sealD
Final filter
考题
单选题Upon arrival at the discharging port, the inert gas system is（）.A
turned onB
turning onC
turn onD
to turn on
考题
单选题Which method is used to supply inert gas from a flue gas system to the cargo tanks?（）A
Exhaust gas pressure from the stackB
High capacity fanC
Inert gas compressorD
Natural aspiration
考题
单选题SOLAS regulations require that the inert gas system shall be capable of delivering inert gas with an oxygen content of not more than what percentage?（）A
5%B
8%C
6%D
3%
考题
单选题What alarm is NOT found on an inert gas system? （）A
Low oxygen alarmB
Low pressure alarmC
Scrubber high water level alarmD
Deck seal low water alarm
考题
单选题The purpose of the deck seal in an inert gas system is to prevent（）.A
flammable vapors from entering machinery spaceB
flue gas escaping to atmosphereC
inert gas escaping to atmosphereD
air entering inert gas system
考题
单选题The component in an inert gas system used for cleaning the gas of solid and sulphur combustion products，while simultaneously cooling the inert gas，is called the（）.A
filterB
coolerC
scrubberD
purifier
考题
单选题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 lostB
the temperature of the inert gas being delivered to the cargo tanks is more than 150°FC
the cooling water supply to the scrubbers is lostD
all of the above
考题
单选题The deck water seal of the inert gas system（）.A
cools the inert gas and prevents soot from entering the cargo tanksB
acts as an emergency shutdown when inlet pressures exceed the safe working pressureC
prevents the backflow of hydrocarbon gasses into nonhazardous areasD
relieves sudden large overpressures in the system
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