单选题The ignition quality of a diesel fuel is indicated by the ()Acetane numberBvolatility pointCviscosity indexDoctane number

单选题
The ignition quality of a diesel fuel is indicated by the ()
A

cetane number

B

volatility point

C

viscosity index

D

octane number


参考解析

解析: 暂无解析

相关考题:

Fuel droplets injected into a diesel engine cylinder must have adequate penetration to ____.A.prolong the ignition delay periodB.ensure the beginning of fuel injectionC.thoroughly utilize the air chargeD.allow controlled fuel combustion

Crankcase explosions in propulsion diesel engines result from ____.A.the splashing of lubrication oil by the crankshaftB.the dilution of crankcase oil with particles of combustionC.broken fuel lines spraying oil on the crankcaseD.the ignition of unburned fuel and air in the crankcase

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

In a diesel engine, late fuel injection is indicated by black or gray exhaust smoke with ______.A.low firing pressureB.low exhaust temperatureC.mechanical knock in each cylinderD.fuel knock in each cylinder

What quality of a diesel fuel is most significant for efficient combustion ________.A.VolatilityB.ViscosityC.Flash pointD.Specific heat

单选题In diesel engineering practice, the term used to express the ignition quality of a particular fuel is()Acetane numberBoctane numberCignition index numberDvolatility point

单选题The ignition of the fuel in diesel engine is caused by the () of compression of the air previously admitted into the cylinders.Avacuum pressureBspecific gravityCheatDviscosity

单选题In an operating diesel engine, pre-ignition can be caused by ()Aexcessively late fuel injectionBoil in the air chargeCwater in the fuelDinjection continuing after the fuel charge is ignited

单选题Diesel engine lube oil diluted with fuel oil is indicated by()Adecreased viscosityBdecreased pour pointCincreased flash pointDincreased viscosity

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 higher the cetane number, () the ignition quality of the fuel.Athe worseBthe betterCthe smallerDthe greater

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The ignition quality of a fuel oil is an important operational consideration because it()Aindicates the amount of abrasive material in the fuelBaffects the starting ability of a cold engineCdetermines the amount of fuel penetration engineDaffects the compression ratio of an operating engine

单选题The ignition quality of diesel fuel is indicated by its()Aoctane numberBcetane numberCviscosity in Saybolt secondsDair fuel ratio

单选题The longer the ignition delay period occurs in a diesel engine, the ().Aless fuel will enter the cylinderBlower will be cylinder compression temperaturesCmore complete will be fuel combustionDmore rapid will be the rise in combustion pressure

单选题Combustion knock occurring in a diesel engine can be caused by ().Aexcessive fuel penetrationBprolonged injection lagCreduced ignition lagDprolonged ignition lag

单选题The ignition quality of a diesel fuel oil is indicated by the ()Aspecific gravityBcetane numberCviscosityDcalorific valve

单选题Heat for igniting the fuel oil in the cylinder of a diesel engine is generated by the ()Aelectronic ignition systemBcompression of air by the pistonCfriction in the fuel injectorDfuel oil bearing system

单选题Poor quality fuel being used in a turbocharged medium-speed, diesel engine could result in ()Ahard startingBexcessive fuel consumptionCloss of powerDall of the above

单选题A diesel engine will lose power if fuel injection occurs too late in the cycle, because the()Afuel droplets will burn as they leave the fuel injectorBfuel will not be properly atomized in the cylinderCmaximum expansion of the burned fuel cannot take place in the cylinderDcompression pressure will be too low to cause fuel ignition

单选题Fuel droplets injected into a diesel engine cylinder must have adequate penetration to ()Aprolong the ignition delay periodBensure the beginning of fuel injectionCthoroughly utilize the air chargeDallow controlled fuel combustion

单选题When comparing different fuels for different engines, the ignition quality of diesel fuel oils becomes a less critical consideration as ()Athe amount of lube oil additives increaseBpiston speeds increaseCinjection pressure decreaseDengine speeds decrease

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

单选题When restarting a heavy fuel diesel engine that has been stopped for some time, the engine should()Aincrease the starting air pressureBuse a higher than normal cranking speedCincrease the fuel injection pressureDuse a fuel having a lower ignition temperature

单选题The rate of pressure rise during the period following fuel ignition in a diesel will result in ()Avalve overlapBvolumetric efficiencyCturbulence of the air changeDfuel efficiency

单选题The minimum fuel oil delivery pressure required for diesel engine injection depends primarily on the()Adegree of cylinder air turbulenceBfiring pressure in the engineCquality of fuel to be injectedDduration of the ignition delay period