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Which statement about inert gas pressures in a cargo tank is TRUE ________．
A.The pressures of the inert gas in the tank may create excessive pressure at the pump while discharging
B.Gas pressures should be maintained at the highest permissible level throughout the discharging process
C.High gas pressures may cause pyrophoric oxidation in the tank
D.High gas pressures may cause loss of suction when stripping
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更多 “ Which statement about inert gas pressures in a cargo tank is TRUE ________．A.The pressures of the inert gas in the tank may create excessive pressure at the pump while dischargingB.Gas pressures should be maintained at the highest permissible level throughout the discharging processC.High gas pressures may cause pyrophoric oxidation in the tankD.High gas pressures may cause loss of suction when stripping ” 相关考题
考题
An inert gas system on a tanker should be used to ______.A.prevent the generation of flammable or combustible gas in tanksB.blow out cargo lines to prevent the build up of gas concentrationsC.dilute tank atmospheres to keep gas concentrations below the lower explosive limitD.prevent fires in the pumproom by continually displacing flammable vapors
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
A cargo tank that is initially gas freed，can be inerted by introducing inert gas by a process known as ______.A.dilutionB.displacementC.precipitationD.Either A or B
考题
Which action must be taken when an individual cargo tank is closed off from the inert gas system by the tank isolation valve?A.The tank must be gas freedB.The tank must be ballastedC.The tank must be vented to the atmosphereD.The bypass valve must also be closed
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
You are discharging cargo and the inert gas system is in operation to inert the tanks. The pressure in a tank being discharged starts to drop below the allowable limit. What action should you take?A.Cut in another IG fan to increase gas flowB.Open the pressure control valve until the pressure increasesC.Open the tank isolation valve to the fully open positionD.Reduce the pumping rate
考题
Which statement about entering into a tank which has been sealed for a long time is TRUE ________．A.The tank should be tested only once to ensure the oxygen content is at least 14% before entryB.The tank must be tested at frequent intervals to ensure that hazardous gasses have not regeneratedC.The tank need not be tested for oxygen content if it is ventilated for more than 24 hoursD.If the oxygen content tests at less than 12% you should wear an approved gas mask
考题
______ shall be provided in every cargo tank and slop tank in accordance with the appropriate Resolutions．A.A load on top systemB.Direct line systemC.Circle line systemD.An inert gas system
考题
Inerting means ______．A.The introduction of inert gas into a tank with the object of reducing the oxygen content to below 8% by volumeB.The introduction of inert gas into a gas free tank for the purpose of reducing the oxygen content to below 8% by volumeC.The introduction of inert gas into a cargo tank during cargo discharge to replace the volume of discharged cargoD.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 use of portable electrical equipment in the pumproom on tank barges is prohibited unless ______．A.The pumproom is gas-freeB.Spaces with bulkheads common to the pumproom are either gas-free，inert，filled with water，or contain grade E liquidC.All other compartments in which flammable vapors and gases may exist are closed and securedD.All of the above
考题
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 loadingB.be gas-freed after loading operationsC.not be maintained in an inert conditionD.be maintained in an inert condition
考题
When a tank is to be gas freed after washing，the concentration of hydrocarbon vapour should be reduced by purging the inerted cargo tank with ______．A.the oxygenB.the gasC.the inert gasD.the hydrocarbon vapour
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
单选题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
单选题What action must be taken when an individual cargo tank is closed off from the inert gas system by the tank isolation valve?（）A
The tank must be gas freedB
The tank must be ballastedC
The tank must be vented to the atmosphereD
The bypass valve must also be closed
考题
单选题You are discharging cargo and the inert gas system is in operation to inert the tanks. The pressure in a tank being discharged starts to drop below the allowable limit. What action should you take? （）A
Cut in another IG fan to increase gas flowB
Open the pressure control valve until the pressure increasesC
Open the tank isolation valve to the fully open positionD
Reduce the pumping rate
考题
单选题An inert gas system is designed to reduce the possibility of tank explosions by（）.A
eliminating sparks and fire in the vicinity of cargo tanksB
removing all hydrocarbon gases from the cargo tanksC
blanketing cargo tanks with inert foamD
reducing the oxygen concentration below levels necessary for combustion
考题
单选题A cargo tank that is initially gas freed，can be inerted by introducing inert gas by a process known as（）.A
dilutionB
displacementC
precipitationD
Either A or B
考题
单选题Which action must be taken when an individual cargo tank is closed off from the inert gas system by the tank isolation valve?（）A
The tank must be gas freedB
The tank must be ballastedC
The tank must be vented to the atmosphereD
The bypass valve must also be closed
考题
单选题Inerting means（）.A
the introduction of inert gas into a tank with the object of reducing the oxygen content to below 8% by volumeB
the introduction of inert gas into a gas free tank for the purpose of reducing the oxygen content to below 8% by volumeC
the introduction of inert gas into a cargo tank during cargo discharge to replace the volume of discharged cargoD
All of the above
考题
单选题The combined fan discharge rate in an inert gas system is related to the（）.A
shoreside loading rateB
maximum cargo pump discharge rateC
boiler forced draft fan rateD
size of the largest cargo tank
考题
单选题An inert gas system on a tanker should be used to（）.A
prevent the generation of flammable or combustible gas in tanksB
blow out cargo lines to prevent the build up of gas concentrationsC
dilute tank atmospheres to keep gas concentrations below the lower explosive limitD
prevent fires in the pumproom by continually displacing flammable vapors
考题
单选题An inert gas system on a tanker should be used to（）.A
prevent the generation of flammable or combustible gas in tanksB
blow out cargo lines to prevent gas concentrationsC
dilute tank atmospheres to keep gas concentrations below the lower explosive limitD
prevent fires in the pumproom by continually displacing flammable vapors
考题
单选题（）shall be provided in every cargo tank and slop tank in accordance with the appropriate Resolutions.A
A load on top systemB
Direct line systemC
Circle line systemD
An inert gas system
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 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
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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