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
Inerting means ______．
A.The introduction of inert gas into a tank with the object of reducing the oxygen content to below 8% by volume
B.The introduction of inert gas into a gas free tank for the purpose of reducing the oxygen content to below 8% by volume
C.The introduction of inert gas into a cargo tank during cargo discharge to replace the volume of discharged cargo
D.All of the above
相关考题：
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
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
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
The purpose of inert gas systems aboard tank vessels is to ______.A.allow sufficient oxygen in the tank to sustain lifeB.prevent outside air from entering the tankC.provide increase in cargo discharge pressureD.comply with double hull pollution prevention regulations
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
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
______ 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
Before discharge of cargo tank ballast is undertaken，______．A.the deck isolating valve is openB.flue gas isolating valveC.blower suction valveD.blower discharge valve
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
What is NOT a requirement for the safe and effective use of a crude oil washing system ________．A.Strip all tanks and remove the bottom residueB.Use an inert gas system while washing tanksC.Use portable washing machines to reach areas obscured by structural members in the tanksD.Debottom the tank used as the source for the tank cleaning machines
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
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
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
You are planning to use the crude oil washing system on your tanker．What is required to prevent electrostatic buildup in the tanks ________．A.The portable machines should be set at the proper drop for the first wash before the fixed machines are usedB.The tank used as the source for the tank cleaning machines should be debottomed for at least one meterC.The inert gas system must reduce the oxygen content in the tank to at least 18%D.The fixed machines must be operated simultaneously with the portable machines to equalize the electrostatic potential
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
单选题The purpose of inert gas systems aboard tank vessels is to（）.Aallow sufficient oxygen in the tank to sustain lifeBprevent outside air from entering the tankCprovide increase in cargo discharge pressureDcomply with double hull pollution prevention regulations
单选题How does an inert gas system on a tanker function to prevent explosions in cargo tanks? （）ADe-energizes the charged mist effectBMaintains a positive pressure on the vent header to cool the flammable vaporsCInert gas filters out the flammable vapors from the cargo tank spacesDInert gas dilutes the flammable vapor and air concentrations to keep them below the lower explosive limit
单选题A flame screen（）.Apermits the passage of vapor but not of flameBprevents the passage of flammable vaporsCprevents inert gas from leaving a tankDpermits vapors to exit but not enter a tank
单选题The purpose of inert gas systems aboard tankers is to（）.Aallow sufficient oxygen in the tank to sustain lifeBprevent outside air from entering the tankCprovide more discharge pressureDcomply with pollution regulations
单选题An inert gas system is designed to reduce the possibility of tank explosions by（）.Aeliminating sparks and fire in the vicinity of cargo tanksBremoving all hydrocarbon gases from the cargo tanksCblanketing cargo tanks with inert foamDreducing the oxygen concentration below levels necessary for combustion
单选题A cargo tank that is initially gas freed，can be inerted by introducing inert gas by a process known as（）.AdilutionBdisplacementCprecipitationDEither A or B
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?（）AThe tank must be gas freedBThe tank must be ballastedCThe tank must be vented to the atmosphereDThe bypass valve must also be closed
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? （）ACut in another IG fan to increase gas flowBOpen the pressure control valve until the pressure increasesCOpen the tank isolation valve to the fully open positionDReduce the pumping rate
单选题Inerting means（）.Athe introduction of inert gas into a tank with the object of reducing the oxygen content to below 8% by volumeBthe introduction of inert gas into a gas free tank for the purpose of reducing the oxygen content to below 8% by volumeCthe introduction of inert gas into a cargo tank during cargo discharge to replace the volume of discharged cargoDAll of the above
单选题An inert gas system on a tanker should be used to（）.Aprevent the generation of flammable or combustible gas in tanksBblow out cargo lines to prevent the build up of gas concentrationsCdilute tank atmospheres to keep gas concentrations below the lower explosive limitDprevent fires in the pumproom by continually displacing flammable vapors
单选题An inert gas system on a tanker should be used to（）.Aprevent the generation of flammable or combustible gas in tanksBblow out cargo lines to prevent gas concentrationsCdilute tank atmospheres to keep gas concentrations below the lower explosive limitDprevent fires in the pumproom by continually displacing flammable vapors
单选题（）shall be provided in every cargo tank and slop tank in accordance with the appropriate Resolutions.AA load on top systemBDirect line systemCCircle line systemDAn inert gas system