When measuring the oxygen content of the cargo tanks prior to loading cargoes requiring vapor recovery，check it ______.A.one meter from the tank bottom and one meter below the tank topB.one half the ullage of the tank and one meter below the tank topC.one half the ullage of the tank and one meter above the tank bottomD.at three meter intervals from the tank top to the bottom
When measuring the oxygen content of the cargo tanks prior to loading cargoes requiring vapor recovery，check it ______.
A.one meter from the tank bottom and one meter below the tank top
B.one half the ullage of the tank and one meter below the tank top
C.one half the ullage of the tank and one meter above the tank bottom
D.at three meter intervals from the tank top to the bottom
相关考题：
An inert gas system installed on a tanker is designed to ______.A.aid in the stripping and cleaning of cargo tanksB.increase the rate of discharge of cargoC.force toxic and explosive fumes from a cargo tank to vent to the outside atmosphereD.lower the oxygen levels inside cargo tanks，making explosion nearly impossible
When referring to dry bulk cargoes，the term "flow state" ______.A.designates the state of a commodity when the ship is heeled past the angle of reposeB.relates to the suitability of loading a cargo by flowing down inclined chutesC.refers to the saturation of a dry bulk product with water to the point where it acts as a liquidD.relates to the minimum granule size of a particular product where it will flow like a liquid at an angle of 30°
To determine which grades of cargo a tank vessel is permitted to carry you should ______.A.refer to the vessel's Certificate of InspectionB.examine the cargo tanks and fittingsC.ask the terminal supervisor or his representativeD.check the loading order
Why is gas-freeing rarely required for LPG cargo tanks?A.LPG is compatible with all cargosB.LPG's high oxygen content makes it nonvolatileC.Cargo tanks are inspected less frequently than on oil tankersD.The cargo tanks are used for one type of cargo only
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
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
Which spaces are required to be segregated from cargo tanks carrying grades A，B，C，or D cargoes ________．A.Pump roomsB.Enclosed deck spacesC.CofferdamsD.Navigation spaces
When the inert gas pressure is being ______ in the cargo tanks，particular attention should be paid to obtaining an oxygen concentration．A.topped upB.bracedC.tommed downD.shored
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When measuring the oxygen content of the cargo tanks prior to loading cargoes requiring vapor recovery，check it（）.Aone meter from the tank bottom and one meter below the tank topBone half the ullage of the tank and one meter below the tank topCone half the ullage of the tank and one meter above the tank bottomDat three meter intervals from the tank top to the bottom
单选题Petroleum cargo tanks should not be topped off at deck level when loading on a cold day because（）.Aa subsequent temperature rise will cause the cargo to overflowBair pockets may cause the cargo to bubble out of the ullage holeCthe increased viscosity of the product requires higher loading pressure which increases the chances of a spillDthe tank valve may be stiff and a spill will occur before the valve can be closed
单选题You are transporting dangerous cargo on your vessel．You must inspect this cargo（）.ADailyBDaily，at sea onlyCAfter encountering rough weatherDAfter loading and prior to arrival in port only
单选题Why is gas-freeing rarely required for LPG cargo tanks? （）ALPG is compatible with all cargosBLPG's high oxygen content makes it nonvolatileCCargo tanks are inspected less frequently than on oil tankersDThe cargo tanks are used for one type of cargo only
单选题To determine which grades of cargo a tank vessel is permitted to carry you should（）.Arefer to the vessel's Certificate of InspectionBexamine the cargo tanks and fittingsCask the terminal supervisor or his representativeDcheck the loading order
单选题Cargo contaminated due to failure to provide clean holds prior to loading is an example of（）.Alack of due diligenceBrestraint of princesCinherent viceDlatent defect
单选题A ship is responsible for the cargo loaded or unloaded（）.Aonly when the cargo is within its railBafter the cargo is checked by tallymenCas soon as the cargo loading or unloading beginsDduring the time when loading or unloading is going on
单选题Cargo transfer operations on a tank vessel need NOT be stopped when（）.Aa tug comes alongside while the tanker is loading gradeBand E cargoes B. a large，fresh oil spill is discovered immediately adjacent to the side of the tankerCthere is an electrical storm in the vicinityDthere is a fire on the dock or on a nearby vessel
单选题When checking the oxygen content of the cargo tanks prior to loading cargoes requiring vapor recovery，the atmosphere must be sampled（）.Aone meter from the tank bottom and one meter below the tank topBone half the ullage of the tank and one meter below the tank topCone half the ullage of the tank and one meter above the tank bottomDat three meter intervals from the tank top
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The ship will be responsible for the cargo loaded or unloaded（）.Aonly when the cargo is within its railBduring the time when loading or ynloading is going onCafter the cargo is checked by tallymenDas soon as loading or discharging begins
单选题An inert gas system installed on a tanker is designed to（）.Aaid in the stripping and cleaning of cargo tanksBincrease the rate of discharge of cargoCforce toxic and explosive fumes from a cargo tank to vent to the outside atmosphereDlower the oxygen levels inside cargo tanks，making explosion nearly impossible
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Sufficient cargo tanks shall be（）prior to each ballast voyage in order that，taking into account the tanker’s trading pattern and expected weather conditions，ballast water is put only into cargo tanks which have been crude oil washed.AinertedBcrude oil washedCgas freedDbatterned down
单选题Which organization would conduct a survey of the insulation in a reefer compartment prior to loading cargo? （）APRC Customs ServiceBOSHACCCSDCCIQ
单选题When referring to dry bulk cargoes，the term “flow state”（）.Adesignates the state of a commodity when the ship is heeled past the angle of reposeBrelates to the suitability of loading a cargo by flowing down inclined chutesCrefers to the saturation of a dry bulk product with water to the point where it acts as a liquidDrelates to the minimum granule size of a particular product where it will flow like a liquid at an angle of 30°
单选题Each inert gas system must be designed to supply the cargo tanks with a gas，or mixture of gasses，that has an oxygen content by volume of（）.A5% or lessB10% or lessC15% or lessD20% or less
单选题To determine which grades of cargo a tanker is permitted to carry you should（）.Arefer to the vessel's Certificate of InspectionBexamine the cargo tanks and fittingsCask the terminal supervisor or his representativeDcheck the loading order