Since lubricating oils and jet fuels are acutely water critical，it is necessary to effect full line draining and mopping up of any water in tanks before loading ______．A.purging with hydrocarbon gasB.gas-freeing operationsC.maintaining an inert conditionD.full line draining and mopping up of any water
Since lubricating oils and jet fuels are acutely water critical，it is necessary to effect full line draining and mopping up of any water in tanks before loading ______．
A.purging with hydrocarbon gas
B.gas-freeing operations
C.maintaining an inert condition
D.full line draining and mopping up of any water
相关考题：
( )is monitored on the drain tank and header tank by magnetic switches with a 20seconds delay to prevent false alarms due to surging A.Low pressure of the lubricating oilB.Low level of the lubricating oilC.High temperature of the lubricating oilD.High temperature of the cooling water
● Perform Quality Control is the process of monitoring and recording results of executing the Quality Plan activities to assess performance and recommend necessary changes．(74) are the techniques and tools in performing quality control．Statistical sampling ① Run chart ②Control charts ③ Critical Path Method ④Pareto chart ⑤ Cause and effect diagrams ⑥(74)A．①②③④B．②③④⑤C．①②③⑤⑥D．①③④⑤⑥
The ability of lubricating oils to resist viscosity changes during temperature changes is indicated by the ____.A.American PetroleumB.Institute number viscosity index numberC.Seconds Saybolt Furol numberD.Seconds Saybolt Universal number
Perform. Quality Control is the process of monitoring and recording results of executing the Quality Plan activities to assess performance and recommend necessary changes. ______ are the techniques and tools in performing quality control.. ① Statistical sampling ② Run chart ③ Control charts ④ Critical Path Method ⑤ Pareto chart ⑥ Cause and effect diagramsA．①②③④B．②③④⑤C．①②③⑤⑥D．①③⑤⑥
The pour point of lubricating oils is affected the most by which of the following?A.Extensive centrifugingB.Wax contentC.Water contentD.Acid content
Perform Quality Control is the process of monitoring and recording results*of executing the Quality Plan activities to assess performance and recommend necessary changes.（） are the techniques and tools in performing quality control① Statistical sampling ② Run chart③ Control charts ④ Critical Path Method⑤ Pareto chart⑥ Cause and effect diagramsA.①②③④B.②③④⑤C.①②③⑤⑥D.①③④⑤⑥
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单选题According to the passage, which of the following should be considered sources of renewable energy?APetroleum, sunlight and wind power.BGas, water and fossil fuels.CCoal, natural gas and hydropower.DSunlight, water and wind power.
单选题To assist separation of low viscosity oils steam coils or electric heaters are fitted （） of the oily water separator.Ain entranceBin exitCin the upper partDon the outside
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单选题The ability of lubricating oils to resist viscosity changes during temperature changes is indicated by the（）AAmerican PetroleumBInstitute number viscosity index numberCSeconds Saybolt Furol numberDSeconds Saybolt Universal number
单选题What is one effect of running a diesel engine at too cool a temperature? （）ABuildup of sludge in the lubricating systemBExcessive fuel consumptionCSevere heat stresses on mechanical partsDFoaming of the lubricating oil
单选题Corrosion inhibitors and/or soluble oils are added to diesel engine cooling systems to （）Amaintain low pH in the cooling waterBreduce the cooling water temperatureCincrease cooling water hardnessDform a protective film on metal surfaces
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单选题The pour point of lubricating oils is affected the most by which of the following?（）AExtensive centrifugingBWax contentCWater contentDAcid content
单选题When comparing different fuels for different engines, the ignition quality of diesel fuel oils becomes a less critical consideration as （）Athe amount of lube oil additives increaseBpiston speeds increaseCinjection pressure decreaseDengine speeds decrease
单选题（）provides strength and strong space for fule,lubricating oil,fresh water,salt(ballast)water and potable water.AThe double bottomBThe cofferdamCThe navigating bridgeDThe superstructure
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