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
Burning fuel with a high sulfur content in a diesel engine will ()
A

increase thermal efficiency

B

cause clogging of the fuel system

C

increase the ability of the engine to start in cold weather

D

produce corrosion in the cylinder and exhaust system at low loads


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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

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

When using a fuel with a higher than normal sulfur content in an auxiliary four stroke diesel engine, you mayA.maintain higher than normal jacket water temperatureB.change the lube oil more frequently than normalC.maintain a higher air-box temperature than normalD.maintain a higher air-box pressure than normal

When fuel is injected late into a diesel engine cylinder_______.A.the exhaust will be clearB.fuel consumption will be lowC.all the fuel will be burned at top dead centerD.fuel consumption will be high

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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White smoke exhausting from a diesel engine can be caused by a ()Ahigh combustion temperatureBhigh compression pressureCcracked cylinder linerDfuel with a high vanadium content

单选题A practical way of checking for excessive fuel injection in one cylinder of an operating diesel engine is to ()Afeel the high pressure fuel lineBcheck the cylinder exhausts for white smoke frequentlyCcheck the cylinder exhaust temperatureDisolate each cylinder and inspect the injector

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When fuel is injected late into a diesel engine cylinder,().Athe exhaust will be clearBfuel consumption will be lowCall the fuel will be burned at top dead centerDfuel consumption will be high

单选题A smoking exhaust from an operating diesel engine could be caused by ()Alow sulfur content in the fuelBa loose injector inlet connectionClate fuel injectionDhigh injection pressure

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Cylinder oil is a high viscosity mineral oil, with a () machined to the anticipated sulfur content of the fuel.ATANBTBNCSANDSBN

单选题To successfully reduce an excessively high diesel engine exhaust gas temperature, you should ().Areduce the engine driven fuel pump outlet pressureBretard the fuel injector timing to reduce powerCincrease the fuel rack settingDreduce the load on the engine

单选题The high pressure in fuel injection system of the diesel engine is produced by the ().Ainjector pumpBfuel injectorCgovernorDturbocharger

单选题The diesel engine is a type of internal combustion engine which ignites the fuel by injecting it into hot, high pressure air in a ().Aair bottleBair compressorCcrank caseDcombustion chamber

单选题If the diesel engine fuel injection timing is changed to delay the start of injection until the pistons are at top dead center, the engine will()Abackfire through the air intakesBdevelop less power under loadChave high firing pressuresDlift its cylinder relief valves

单选题Injection lag in a diesel engine may be caused by()Aa higher cetane number of fuel oilBthe diesel fuel used having a high viscosityCmechanical rigidity in the lube pump mechanismDa decrease rigidity in the fuel pump delivery pressure

单选题Significant retardation of a diesel engine fuel injection timing will result in ()Asmoother engine operationBadvanced fuel ignitionCincreased fuel economyDreduced engine power

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A diesel engines crankcase oil level is found to be too high√ You should suspect that ().Athe engine was over filledBthere might be a fuel leakCthere might be a water leakDall of the above

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