Lesson 4Fuel Oil System

1、【单选题】1（）fuel oils（）lubricating oils require treatment before passing to the engine.A.Both; and B.Neither; nor C.Either; or D.Both;or答案：A答题解析：在进入主机前燃油和滑油均需进行处理。【单选题】2（）is not properly set thus causing either advanced or retarded firing.A.A piston B.A fuel injection pumpC.A feed water pump D.A lube oi

2、l pump答案：B答题解析：一台喷油泵定时不准确，因此引起的不是早燃就是后燃。【单选题】3（）rods are not in proper condition so that too much fuel is supplied to the corresponding cylinder.A.Piston B.Sounding C.Regulating D.Connecting答案：C答题解析：调节杆调节不当以致造成相应气缸供油过多。【单选题】4（）or air venting arrangement is fitted to the fuel supply passage.A.An air

3、pump B.A compressor C.A fuel pump D.A priming答案：D答题解析：供油管路装有灌注或放气装置，（燃油供应管道中装备有放气设备）。【单选题】5（）controls the fuel oil temperature in order to provide oil at the correct viscosity for combustion.A.The viscosity regulator B.The temperature controllerC.The flow meter D.The pressure switch答案：A答题解析：粘度调节器通过控

4、制燃油的温度来实现粘度的控制。【单选题】6（）should be taken out, cleaned, and lifting checked every four to six months.A.Pistons B.Fuel injection valvesC.Crankshaft D.Cylinder covers答案：B答题解析：喷油器（油头）应每46个月取出、清洁并进行启阀压力试验。【单选题】7A（）on the delivery side of the pump closes to stop fuel oil returning from the injector;A.return

5、 valve B.non-return valveC.safety unit D.stop valve答案：B答题解析：喷油泵排出侧的止回阀（单向阀）阻止了燃油从喷油器回流。【单选题】8 A（）ensures a constant pressure at the fuel main.A.transfer pump B.control air bottleC.pressure regulating valve D.non-returning valve答案：C答题解析：压力调节阀确保燃油总管中的压力稳定。【单选题】9A common trouble with the fuel pump plun

6、ger or fuel valve spindle isA.water leakage B.steam leakage C.oil leakage D.air leakage答案：C答题解析：喷油泵柱塞或喷油油针阀常见的故障是漏油。【单选题】10A common trouble with the fuel pump plungers or fuel valve spindle is（）A.broken down B.stuck C.oil leakage D.carbonized答案：C答题解析：喷油泵柱塞或喷油针阀常见的故障是漏油。【单选题】11A governor automaticall

7、y controls engine speed by regulating（）.A.fuel supply B.firing order C.engine load D.oil level答案：A答题解析：调速器通过调节燃油的供应来自动地控制发动机的转速。【单选题】12A slow-speed two-stroke diesel is usually arranged to operate continuously on heavy fuel oil and has available a（）supply for manoeuvring conditions.A.lubricating oil

8、 B.diesel oil C.residual oil D.hydraulic oil答案：B答题解析：低速二冲程柴油机能依靠重油连续运行，同时在机动操纵状态下能使用轻柴油。【单选题】013Before being used the fuel service tank should be drained of（）A.soda solution B.mechanical impuritiesC.ballast D.water and residuals答案：D答题解析：注：燃油日用柜使用前应放残，故选D。【单选题】14As the plunger moves up, the ports are

9、 closed and the fuel（）and delivered to the injector nozzle at very high pressure.A.being compressed B.to be pumped up C.is pressurized D.are built up答案：C答题解析：随着柱塞上行，进油口被关闭，燃油被加压，并以很高的压力供到喷油嘴。【单选题】15 Care and cleanliness are required when installing diesel fuel filters（）.A.to prevent the fuel system

10、from becoming air-houndB. to prevent the fuel system becoming clogged with dirty particlesC.both A and BD.to prevent the lubricating oil from leaking out of the filter element答案：C答题解析：安装燃油滤器时，要采取措施以避免空气大量进入燃油系统，同时要保持清洁，以免燃油系统被污垢颗粒堵塞。【单选题】16Dirt in the fuel oil system of a diesel engine can cause（）.A

11、.clogged filters B.poor combustion C.overloading of the diesel D.shock of fuel lines答案：A答题解析：柴油机燃油系统中的脏物会引起滤器堵塞。【单选题】17 Engine fuel pump index is（）.A.the viscosity index B.the fuel oil contentsC.the starting speed D.the reading at the rack答案：D答题解析：发动机燃油泵的刻度指的是燃油齿条的读数。【单选题】18 Failure of fuel injectio

12、n is usually due to trouble in the（）.A.exhaust valves B.mechanical lubricatorsC.cooling water pumps D.fuel injection pumps答案：D答题解析：燃油喷射的故障往往是燃油喷射泵的故障，故选D。【单选题】19Fuel is delivered into the combustion space by（）.A.a cooling system B.a lubricating systemC.an electric system D.an injection system答案：D答题解

13、析：燃油通过燃油喷射系统供应到燃烧室，故选D。【单选题】20Fuel is not supplied to the corresponding cylinder due to a failure of（）A.the motor B.the fresh water generatorC.the governor D.the fuel pump答案：D答题解析：由于喷油泵发生了故障，燃油不能供应到相应的气缸，故选D。【单选题】21Fuel is not supplied to the corresponding cylinders due toA.a failure of the motor B.

14、A failure of lubricatorC.a failure of cylinder D.a failure of fuel pump答案：D答题解析：由于喷油泵发生了故障，燃油不能供应到相应的气缸。【单选题】22In a typical fuel oil system, the oil is stored in tanks in the double bottom from which it is pumped to（）and heated.A.a service tank B.a collecting tank C.a sump D.a settling tank答案：D答题解析：

15、在典型的燃油系统中，燃油储存在双层底油舱中，然后被驳运到沉淀柜并加热【单选题】23In a typical fuel system, the oil is stored in （）in the double bottom.A.setting tanks B.service tanks C.tanks D.drain tanks答案：C答题解析：在一个典型的燃油系统中，燃油储存在双层底油舱中。【单选题】24 In order to ensure perfect atomization, the fuel oil（）before injection.A.has to be cooled B.has

16、 heatedC.has preheated D.has to be preheated答案：D答题解析：为了确保良好的雾化，燃油喷射前必须经过预热，故选D。【单选题】25Increasing the temperature of a fuel will reduce its（）.A.viscosity B.pressure C.resistance D.setting point答案：A答题解析：提高燃油的温度将会减小其粘度【单选题】26On a diesel engine, fuel is delivered into the combustion space by（）.A.a cooli

17、ng system B.a lubrication oil systemC.an electric system D.an injection system答案：D答题解析：柴油机中，燃油通过喷射系统供应到燃烧室。【单选题】27Strainers and fine filters should be cleaned at intervals,（）prevent dirt from getting under a fuel injection pump valve.A.in order that B.so as to C.so that D.in addition to答案：B答题解析：粗细滤器

18、应该定期清洁，以防止脏物积聚在喷油泵下面，故选Ba【单选题】28 The（）is not properly set thus causing either advanced or retarded firing.A.piston B.fuel injection pump C.crankshaft D.oil can答案：B答题解析：燃油喷射泵没有正确设定，引起发火提前或滞后。【单选题】29The（）of the diesel oil must not exceed 120 degree Fahrenheit.A.temperature B.pressure C.acid value D.vi

19、scosity答案：A答题解析：柴油的温度不得超过1200F【单选题】30The（）or balance tank collects the re-circulated fuel oil.A.buffer B.sump C.bilge D.overflowing答案：A答题解析：燃油系统中，缓冲柜或平衡柜（集油柜）用来收集再循环的燃油【单选题】31The（）in the injector will lift at a pre-set pressure which ensures that the fuel will atomize once it enters the cylinder.A.n

20、eedle valve B.nozzles C.piston D.spring答案：A答题解析：燃油喷油器的针阀将在预先设定的压力下开启，该压力能确保一旦燃油进入气缸，能雾化【单选题】32The fuel injector pump is operated by（）which drives the plunger up and down.A.a separate motor B.a cam C.a generator D.a chain答案：B答题解析：燃油喷射泵由凸轮来驱动，凸轮驱动柱塞上下运动，故选B。【单选题】33The fuel is supplied to the pump thro

21、ugh ports or openings in the（）or cylinder of the pump.A.bottle B.injector C.piston D.barrel答案：D答题解析：燃油通过套筒上的油孔供应到喷射泵，故选D barrel套筒。【单选题】34The fuel oil system for a diesel engine can be considered in two parts-the fuel supply and the（）systems.A.fuel treatment B.fuel combustion C.fuel injection D.fuel

22、separating答案：C答题解析：柴油机的燃油系统由两部分组成，即燃油供应系统和燃油喷射系统。【单选题】35The fuel pipes and 'ducts should be blown with（）.A.atmosphere B.the fresh waterC.compressed air D.chemical compounds答案：C答题解析：燃油管系应用压缩空气吹洗，故选C。【单选题】36The heart of the diesel engine is the（）where the fuel is burnt and the power developed.A.cr

23、ankcase B.cylinder C.scavenge box D.piston答案：B答题解析：柴油机的心脏是气缸，在那里燃、抽燃烧并发出功率。【单选题】37The high pressure in fuel injection system of the diesel engine is produced by the（）A.injector pump B.fuel injector C.governor D.turbocharger答案：A答题解析：柴油机燃油喷射系统中的高压是由燃油喷射泵产生的，故选A。【单选题】38The ignition of the fuel in diese

24、l engine is caused by the（）of compression of the air previously admitted into the cylinders.A.vacuum pressure B.specific gravity C.heat D.viscosity答案：C答题解析：柴油机机中，燃油的发火是由先前进入到气缸的空气的压缩热量引起的（压燃式）【单选题】39The most common cause of lowering the crankcase lube oil flash point is（）A.more water contents B.cont

25、amination with fuel oilC.higher temperature D.sufficient cooling of oil mist答案：B答题解析：使得曲柄箱油闪点降低的常见原因是混入燃油【单选题】40The needle valve in a fuel valve will （）when the fuel pressure action on the needle valve tapered face exerts a force lower than that of the spring compression.A.be jammed B.be opened C.be

26、 seated D.be broken答案：C答题解析：当作用在针阀锥形面上的燃油压力小于掸簧力时，油头的针阀将关闭【单选题】41The needle valve in the injector （）at a pre-set pressure which ensures that the fuel will atomize once it enters the cylinder.A.will lift B.will be lifted C.will close D.will be closed答案：A答题解析：油头的针阀将在预先设定的压力下开启，该压力能确保一旦燃油进入气缸便能雾化。【单选题】

27、42The oil was pumped up in the settle tank such a height（）A.spilled B.overflowed C.sprayed D.injected答案：B答题解析：沉淀油柜的油被泵得太高了，以致溢出。spill是溢油，spray是喷洒，inject是喷射，只有overflow是满了溢出，故选B。【单选题】43The operation between two fuel injections is called a（）A.timing cycle B.working cycle C.working hour D.working stroke

28、答案：B答题解析：两次燃油喷射之间的工作过程被称作一个工作循环，故选B【单选题】44The operation between two fuel injections is called a working cycle, which consists of a fixed sequence of events. What does "which" mean in this sentence?A. a working cycle B. B.the operation C. C.two fuel injections D. D.events答案：A答题解析：两次燃油喷射之间的工

29、作过程被称作一个工作循环，该工作循环由一固定的动作顺序组成。定语从句的引导词“which”，指的是“a working cycle”，故选A【单选题】45The pump has a constant stroke and the amount of fuel delivered is regulated by rotating（） which has a specially arranged helical groove cut into it.A.the pump cylinder B.the pump cam C.the pump plunger D.the pump roller答案：

30、C答题解析：喷油泵具有恒定的行程，输送的燃油量通过油泵柱塞的回转来调节。【单选题】46The sequence of fuel injection into cylinders is determined by（）.A.the steering B.the driven gear C.the turning gear D.the timing gear答案：D答题解析：燃油喷射到气缸呈的顺序由定时齿轮决定，故选D。【单选题】47The timing of the injection can be altered by raising or lowering the pump（）in relat

31、ion to the cam.A.needle valve B.cylinder C.piston D.plunger答案：D答题解析：喷油定时可以通过改变柱塞和凸轮之间的相对位置来改变，故选D。【单选题】48The viscosity regulator controls the fuel oil temperature（）provide oil at the correct viscosity for combustion.A.in order that B.because of C.in order to D.owing to答案：C答题解析：粘度调节器通过控制燃油的温度以提供适宜的粘度

32、以供燃烧，故选C。【单选题】49 What is used to purify water and foreign matters from the fuel oil in the following?A.Compressor. B.Separator. C.Evaporator. D.Fuel pump.答案：B答题解析：分油机用来分离燃油中的水分和杂质，故选B。【单选题】50After the ship is out of the harbour and in "Full Speed", we'll change（）.A.to fuel oil instead

33、of diesel oil B.for fuel oil instead of diesel oilC.to diesel oil into fuel oil D.for diesel oil into fuel oil答案：A答题解析：船舶出港了，并全速前进，使用燃油来取代柴油，故选A【单选题】51The rate of fuel injection in a diesel engine cylinder depends primarily on（） .A.the size of the holes in the fuel nozzle B.timing of the pumpC.suppl

34、y pressure to the pump D.shape of the combustion chamber答案：A答题解析：柴油机气缸燃油喷射量主要取决于喷嘴油孔的尺寸，故选A【单选题】52Fuel injectors used in heavy fuel oil systems are usually provided with cooling to reduceA.cold corrosion of the nozzles B.fuel viscosity for better atomizationC.carbon accumulation on the nozzles D.fue

35、l detonation in the cylinders答案：C答题解析：重质燃油系统中使用的油头，一般需要冷却以减少喷嘴结炭。【单选题】53Injection lag can be caused by（）.A.improper timing of the intake valves B.setting of the pump plungerC.compressibility of the fuel D.position of the needle valve答案：C答题解析：燃油的可压缩性会引起喷油延时【单选题】54Diesel fuel oil having a low cetane r

36、ating can result in（）.A.improved cold weather starting B.smoother engine operationC.combustion knock D.reduce ignition lag答案：C答题解析：燃油十六烷值过低，燃烧过程会粗爆，故选C。【单选题】55It should be evident that the amount of fuel injected into the cylinder is dependent on the position of the helix relative to the（）.A.inlet p

37、ort B.exhaust port C.spill port D.scavenge port答案：C答题解析：很明显，喷人气缸的油量取决于螺旋槽相对于回流孔的位置，故选C。【单选题】56In a jerk pump, the amount of fuel that will be forced through the spray nozzle on each up- ward stroke of the plunger depends on（）.A.the pump supply pressureB.the slope of the fuel camC.how the plunger is

38、rotatedD.the number of sleeve segments engaged with the rack答案：C答题解析：对于脉动泵，在柱塞的每个向上冲程通过雾化喷嘴喷入的油量取决于柱塞旋转的方式。【单选题】57The most common diesel engine fuel system problems are caused by（）A.incorrect adjustments B.dirty fuel C.broken fuel lines D.excessive vibration答案：B答题解析：柴油机燃油系统最常见的问题由燃油脏导致。【单选题】58Which

39、of the following problems may occur when using fuel oil with a high sulphur content?A.Injection lag B.Lube oil dilution C.Pre-ignition D.Corrosion答案：D答题解析：使用高硫分的燃油会产生腐蚀。【单选题】59The consistent burning of fuel oil with a high sulfur content in a diesel engine will result inA.clogged fuel injection pumpsB.increased cylinder lin