The separation of impurities and water from ______is essential for good combustion of diesel engines.A.lube oilB.fuel oilC.turbine oilD.grease
The separation of impurities and water from ______is essential for good combustion of diesel engines.
A.lube oil
B.fuel oil
C.turbine oil
D.grease
相关考题：
Which of the following is true?A.The water in Texas have been reduced by 75%.B.Most industries in the world suffer from water shortagers.C.The underground water in Saudi Arabia might run out in 50 years.D.Good management of water use resulted from the project in the Central Valley.
Theoretical perfect combustion in a diesel engine yields by-products of_____.A.aldehydes and carbon dioxideB.water vapor and carbon monoxideC.nitrogen and carbon monoxideD.water vapor and carbon dioxide
When a clarifier is running the impurities and water collect at the bowl _____.A.centerB.peripheryC.inletD.upper parts
______ is not likely to be a methods of Traffic Separation．A.Separation of opposing streams of traffic by separation zones or linesB.The separation of through traffic from local traffic by provision of inshore traffic zonesC.Division of traffic from several different direction into sectorsD.Control of routing traffic through shipping routes
Good anchorage may be obtained anywhere，generally mud and sand，in this water area Vessel may have______．A.good dragging groundB.good towing groundC.good holding groundD.good grabbing ground
Carl Sagan believes that Venus might be colonized from earth because__________.A.it might be possible to change its atmosphereB.its atmosphere is the same as the earth'sC.there is a good supply of water on VenusD.the days on Venus are long enough
单选题A shallow dish positioned at the normal water level is connected to the（）This enables the blowing down or removal of scum and impurities from the water surface.Amain stern stop valveBauxiliary steam stop valveCscum valveDblow down valve
单选题A high rate of separation between oil and water is favored by （）.Alarge size of oil globuleBlow temperatureChigh viscosityDhigh flow rate
单选题What is NOT a function of the steam drum of a marine water-tube boiler（）.AReceives saturated steam from the generating tubesBServes as a reservoir of boiler feed waterCHolds internal fittings for separation of moisture from steamDCollects steam exhausted from the turbines
单选题Which statement concerning the collection of fresh water is FALSE?（）AFresh water may be obtained from fishBlifeboat covers or canopies should be washed with rain before drinking water is collectedCFresh water may be collected from condensation inside the life-raftDFreshwater cannot be produced from standing seawater
单选题Bottom blow valves are installed on auxiliary water-tube boilers to （）Aremove suspended and precipitated solids from the boiler waterBcompletely drain the boiler in an emergency situationCprevent hardened scale deposits in the water drumDremove floating impurities from the oily water surface
单选题The removal of （） from lubricating oil will reduce engine wear and possible breakdowns.Acontaminating waterBcontaminated additivesCcontaminated fuelDcontaminating impurities
单选题The emulsion of the oil is mainly caused by （）.Athe solid impurities of large particleBthe solid impurities of fine particleCthe water contentDboth water and solid impurities
单选题Clean oil is achieved in a clarifier bowl where the impurities and water collect at the bowl （）.AbottomBtopCcenterDperiphery
单选题The separation of impurities and water from （） is essential for good combustion of diesel engines.Alube oilBfuel oilCturbine oilDgrease
单选题A centrifuge arranged to separate impurities and small amounts of water from oil is known as （）.Aan oily water separatorBa purifierCa centrifugal compressorDa clarifier
单选题The principle of separation by which all commercially available oily water separators function is （） differential between oil and water.Athe temperatureBthe viscosityCthe gravityDthe size
单选题（） is not likely to be a methods of Traffic Separation.ASeparation of opposing streams of traffic by separation zones or linesBThe separation of through traffic from local traffic by provision of inshore traffic zonesCDivision of traffic from several different direction into sectorsDControl of routing traffic through shipping routes
单选题When a clarifier is running the impurities and water collect at the bowl （）.AcenterBperipheryCinletDupper parts
单选题Impurities from the boiler water surface can be removed through the （）.Asafety valveBblow down valveCscum valveDfeed check valve
单选题As for turbine oil, contact with water in the form of steam will be inevitable so good （） properties will be essential.AdefrostingBde-oilingCdemulsifyingDdehumidifying
单选题Bottom blow valves are installed on auxiliary water-tube boilers to （）Acompletely drain the boiler in an emergencyBprevent sludge from forming in the drumCremove floating impurities from the boiler water surfaceDremove settled solids from the water drum
单选题Some diesel engines are fitted with a thermometer in the cooling water outlet from each cylinderIf the cooling water temperature from all cylinders begins to rise above normal, you should suspect （）Aincrease blow-by in all cylindersBincomplete combustion in all cylinderCoverloading in all cylindersDinsufficient fuel delivery to all cylinders
单选题The air required for combustion is taken from the engine room through a filter fitted on the turbochargerThis reduces the risk for too and contamination of the combustion air（）Ahigh temperaturesBlow temperaturesCwetDdirty
单选题A vessel using a traffic separation scheme shall so far as practicable（）a traffic separation line or separation zone.Akeep well clearBkeep very farCkeep clear ofDkeep clear from
单选题The expression “separate the wheat from the chaff in the teaching profession” is closest in meaning to ______.Adistinguish better teachers from less capable onesBdifferentiate young teachers from old onesCtell the essential qualities of good teachingDreevaluate the role of senior teachers