单选题The adverse effects of burning high sulfur fuel can be compensated for by using a cylinder oil having sufficient（）Adispersant additivesBfloc pointCalkalinity additivesDignition quality
单选题
The adverse effects of burning high sulfur fuel can be compensated for by using a cylinder oil having sufficient（）
A
dispersant additives
B
floc point
C
alkalinity additives
D
ignition quality
参考解析
解析：
暂无解析
相关考题：
Which of the listed factors will indicate the most about the ability of a fuel to ignite in a diesel engine?A.ViscosityB.Sulfur contentC.Pour pointD.Cetane number
Passage ThreeHow can we get rid of garbage.9 Do we have enough energy sources to meet our future energy needs?These are two important questions that many people are asking today. Some people think that man might be able to solve both problems at the same time. They suggest using garbage as an energy source, and at the time it can save the land to hold garbage.For a long time, people buried garbage or dumped it on empty land. Now, empty land is scarce. But more and more garbage is produced each year. However, garbage can be a good fuel to use. The things in garbage do not look like coal, petroleum, or natural gas; but they are chemically similar to these fossil fuels. As we use up our fossil-fuel supplies, we might be able to use garbage as an energy source. Burning garbage is not a new idea. Some cities in Europe and the United States have been burning garbage for years. The heat that is produced by burning garbage is used to boil water. The steam that is produced is used to make electricity or to heat nearby buildings. In Paris, France, some power plants burn almost 2 million metric tons of the cities garbage each year. The amount of energy produced is about the same as would be produced by burning almost a half million barrels of oil.Our fossil fuel supplies are limited. Burning garbage might be one kind of energy source that we can use to help meet our energy needs.44. What two problems can man solve by burning garbage?A. The shortage of energy and air pollution.B. The shortage of energy and the land to hold garbage.C. Air pollution and the shortage of fossil fuel.D. Air pollution and the shortage of land to hold garbage.
(The Trouble with Television) The American public is not well aware of the adverse effects of television.()
A smoking exhaust from an operating diesel engine could be caused by( ).A.low sulfur content in the fuelB.a loose injector inlet connectionC.late fuel injectionD.high injection pressure
Passage FourHow can we get rid of garbage?Do we have enough energy sources to meet our future energy needs?These are two important questions that many people are asking today．Some people think that man might be able to solve both problems at the same time,They suggest using garbage as an energy source,and at the same time it can save the land to hold garbage．For a long time,people buried garbage or dumped it on empty land．Now,empty land is scarce．But more and more garbage is produced each year．However,garbage can be a good fuel to use．The things in garbage do not look like coal,petroleum,or natural gas;but they are chemically similar to these fossil fuels．As we use up our fossil-fuel supplies,we might be able to use garbage as an energy source．Burning garbage is not a new idea．Some cities in Europe and the United States have been burning garbage for years．The heat that is produced by burning garbage is used to boil water．The steam that is produced is used to make electricity or to heat nearby,buildings．In Paris,France,some power plants burn almost 2 million metric tons of the cities garbage each year．The amount of energy produced is about the same as would be produced by burning almost a half million barrels of oil．Our fossil fuel supplies are limited．Burning garbage might be one kind of energy source that we can use to help meet our energy needs．This method could also reduce the amount if garbage piling up on the earth．The best title for the passage may be______A.Garbage and the EarthB.Fossil Fuel and GarbageC.Land and GarbageD.Garbage?Energy Source
单选题The consistent burning of fuel oil with a high sulfur content in a diesel engine will result in （）Aclogged fuel injection pumpsBincreased cylinder liner wearCintake valve stem corrosionDvarnish deposit on pistons
单选题According to information given in the passage, which of the following statements presents the most accurate comparison of an average ton of coal from Wyoming with an average ton of coal from the Appalachian range in West Virginia?AThe former is cheaper and has higher sulfur content than the latter.BThe latter is found closer to the surface and contains more sulfur than the former.CThe former can help coal-burning power plants meet limits on sulfur dioxide emissions and costs more than the latter.DThe latter generates more energy per pound of coal than the former.EThe former is found closer to the surface than the latter and helps coal-burnning power plants meet limits on sulfur dioxide emissions.
单选题In a diesel engine, offers the heat energy directly（）； works as working medium and changes the heat energy to mechanical energy（）Athe burning of the fuel； medium shaftBfuel spray； fresh airCfuel； fuel sprayDthe burning of the fuel； the burned gas mixture
单选题Heat damage to fuel injection nozzles on small high-speed diesel engines, can be prevented by（）Aemploying fuel oil as a cooling mediumBpreventing hard carbon deposit on nozzle tipsCavoiding fuel oil temperature exceeding builder’s specificationDensuring good metallic contact between nozzles and cylinder heads
单选题The burning of fuel oil in a diesel engine having a high sodium content, will cause （）Acorrosion and grooving of exhaust valvesBcorrosion and gumming of the fuel injection pumpCsalt deposits in the exhaust manifoldDslag deposits in the fuel injection equipment
单选题If the engine can be started and maneuvered on high viscosity fuel, the （）of the fuel reaching the injectors should be raised to such a point that the viscosity is less than the required value, ie27c St.ApressureBtemperatureCviscosityDdensity
单选题A viscosity regulator used for an engine is usually provided in order to （） for an engine burning heavy fuel oil.Aregulate the fuel supplyBmaintain a constant fuel viscosity at the fuel valvesCmaintain efficient coolingDalter the fuel density
单选题Black smoke coming from a boiler can be caused by （）.Alow water levelBhigh water levelCexcessively high fuel pressureDlow oil temperature
单选题The ability of a fuel particle to travel into the combustion chamber before burning is called （）.ApenetrationBpermanenceCturbulenceDatomization
单选题Black smoke exhausting from an operating diesel engine can be caused by （）Afuel dribbling from leaking fuel injectorsBburning fuel with a high carbon contentCburning fuel with a high vanadium contentDburning fuel with a lower sulphur content
单选题Burning fuel with a high sulfur content in a diesel engine will （）Aincrease thermal efficiencyBcause clogging of the fuel systemCincrease the ability of the engine to start in cold weatherDproduce corrosion in the cylinder and exhaust system at low loads
单选题High exhaust temperature and black smoke exhausting from an auxiliary diesel engine can be caused by （）.Aengine overloadBlow combustion temperatureCplugged fuel nozzle holesDexcessive compression pressure
单选题High exhaust temperatures from all of cylinder of a turbocharged, four-stroke/cycle diesel engine can be caused by an（）Ainoperative turbochargerBinadequate fuel supplyCoverload on one cylinderDunequal load distribution
单选题Cylinder oil is a high viscosity mineral oil, with a （） machined to the anticipated sulfur content of the fuel.ATANBTBNCSANDSBN
单选题Exhaust valve grooving and corrosion is caused by certain components of residual fuel oilThese components are sodium, sulfur, and （）.AvanadiumBcarbonCcopperDash
单选题Water in the fuel can prevent the engine from starting, prevent it from developing full power, or （）Arun at an irregular speedBcreate high lube oil temperatureCcause the engine to over-speedDcause blue smoke in the exhaust
单选题One remedy for a high firing pressure, in addition to a high exhaust temperature in one cylinder of a diesel engine, is to （）Aincrease scavenge air pressureBreduce fuel booster pump pressureCadjust the fuel rackDretard fuel injector timing
单选题Diesel engine lube oil can become contaminated as a result（）Athe water produced during combustionBthe sulfur in the fuelCunburned fuel oilDall of the above
单选题The total weight of cargo，fuel，water，stores，passengers and crew，and their effects，that a ship can carry，is the（）.Abale cubicBdeadweightCgross tonnageDloaded displacement
单选题High cylinder firing pressure, accompanied by low exhaust temperature, can result from （）Aimproper fuel rack positingBlengthy exhaust valve durationCextend operation at light loadDexcessively early injection timing
单选题Black smoke coming from a boiler can be caused by （）.Alow water levelBlow oil pressureCexcessively high fuel pressureDan improper air/fuel ratio
单选题Flame failure in an automatically fired auxiliary boiler can from a/an （）Aincorrect electrode settingBincorrect nozzle positionCclogged fuel nozzleDbroken high tension lead