单选题Fuel oil having a low cetane rating could result in()Aimproved cold weather startingBexcessive fuel oil consumptionCreduced ignition lagDsmoother engine operation

单选题
Fuel oil having a low cetane rating could result in()
A

improved cold weather starting

B

excessive fuel oil consumption

C

reduced ignition lag

D

smoother engine operation


参考解析

解析: 暂无解析

相关考题:

199 During extremely cold weather, while starting an engine,it turns too slowly and fails to start.This problem is most likely theresult of() A.high fuel oil viscosityB.low fuel oil temperatureC.high lube oil viscosityD.energized alow plugs

Low compression in a diesel engine could be caused byA.worn or broken cylinder liner sealing ringsB.high cooling water temperatureC.worn or broken piston ringsD.low fuel oil pressure

Which of the following represents the significance the fuel oil cetane number?A.The cetane number has no affect on injection lagB.The cetane number is an indication of the fuel's viscosityC.Ignition lag is reduced with fuels having a high cetane numberD.The cetane number is of little significance in the combustion process

The cetane number of a diesel fuel oil indicates its ______.A.ignition qualityB.acid contentC.heating valueD.viscosity

The cetane number of a diesel fuel oil indicates its ______.A.viscosityB.acid contentC.heating valueD.ignition quality

Persistent knocking in one cylinder of an eight cylinder diesel engine would MOST likely be caused by______.A.using fuel oil with low cetane numberB.a badly worn piston pinC.a loose flywheel keyD.a loose bed plate bolt

单选题When lighting off an auxiliary boiler, which of the problems listed could cause the burners to sputter?()Acold fuel oilBlow fuel oil pressureClow atomizing steam pressureDwater in the fuel oil

单选题Combustion knock will most likely occur as a result of using a fuel with()Alow ignition qualityBa high volatilityClow ignition delayDa high cetane number

单选题If a fire ignites in the engine room as a result of a high pressure fuel oil leak, you should FIRST ().Asecure the ventilationBfind a soda acid extinguisherCshut off the fuel oil supplyDsecure the generator

单选题Fuel oil contamination of an auxiliary diesel engine lube oil can result in()Aan increased flash pointBhigher lube oil pressuresCan increased viscosityDlower lube oil pressures

单选题A diesel engine is turned at normal cranking speed and no ignition occursThis could be the result of ()Alow lube oil temperatureBlow starting air temperatureCair bubbles in the fuel oil systemDwater in the starting air system

单选题During extremely cold weather, while starting an engine, it turns too slowly and fails to startThis problem is most likely the result of ()Ahigh fuel oil viscosityBlow fuel oil temperatureChigh lube oil viscosityDenergized glow plugs

单选题Low compression in a diesel engine could be caused by()Aworn or broken cylinder liner sealing ringsBhigh cooling water temperatureCworn or broken piston ringsDlow fuel oil pressure

单选题Which of the following statements is true concerning the cetane number of diesel fuel?()AThe cetane number affects the amount of injection lagBThe cetane number is an indication of the fuels viscosityCIgnition lag is reduced with fuels having a high cetane numberDThe cetane number is of little significance in the combustion process

单选题Which of the following statements is true concerning the cetane number rating of diesel fuel? ()AThe cetane number is obtained by comparing the fuel with cetane a colorless liquid hydrocarbonBThe higher the cetane number, the shorter the ignition lagCThe highest cetane number of fuel is 100DAll of the above

单选题The cetane number of a diesel fuel oil indicates its()AViscosityBacid contentCheating valueDignition quality

单选题Crankcase explosions in propulsion diesel result from()Athe splashing of lubrication oil by the crankshaftBthe dilution of crankcase oil with particles of combustionCbroken fuel lines spraying oil on the crankcaseDthe ignition of unburned fuel and air in the crankcase

单选题Operating a diesel engine under light loads and at low temperatures for an exhaust for an extended period can result in()Aformation of carbon on the intake and exhaust portsBhigh water jacket temperaturesCoverheated pistons and cylindersDan increase in lube oil viscosity due to fuel dilution

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A large, low-speed, crosshead, main propulsion diesel engine using residual fuel oils must have a cylinder oil having a ()Alow TBN valueBhigh alkaline reserveClow flash pointDhigh pour point

单选题Ignition failure in an automatically controlled auxiliary boiler could be caused by()Acarbon deposits on the flame scannerBhigh fuel oil temperatureClow fuel oil viscosityDhigh steam pressure

单选题One result of operating a diesel engine at light load with excessively low cooling water temperature is a/an ()Adecrease in ignition lagBincrease in fuel economyCreduction in lube oil viscosityDincrease in cylinder misfiring

单选题The longer the ignition delay period resulting from improper use of low cetane fuel, the ()Aless fuel will enter the cylinderBhigher the cylinder combustion temperatureCmore complete the fuel combustionDmore rapid the rise in combustion pressure

单选题Improper maintenance of the fuel oil burners in an automatically fired auxiliary boiler, could result in ()Aincreased fuel consumptionBincreased feed water consumptionCfuel pump failureDcombustion control system failure

单选题Surface irregularities, such as erosion and pitting on injection pump plungers, will()Aincrease ignition delayBaffect fuel oil meteringCaffect engine performance at low speedDonly disappear due to fuel oil abrasion

单选题Which of the following represents the significance the fuel oil cetane number?()AThe cetane number has no affect on injection lagBThe cetane number is an indication of the fuel’s viscosityCIgnition lag is reduced with fuels having a high cetane numberDThe cetane number is of little significance in the combustion

单选题The cetane rating of diesel fuel is an indication of the ()Aignition quality of the fuelBcalorific value of the fuelCflash point of the fuelDrate of fuel consumption