What quality of a diesel fuel is most significant for efficient combustion ________．A.VolatilityB.ViscosityC.Flash pointD.Specific heat
What quality of a diesel fuel is most significant for efficient combustion ________．
A.Volatility
B.Viscosity
C.Flash point
D.Specific heat
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
The separation of impurities and water from ______is essential for good combustion of diesel engines.A.lube oilB.fuel oilC.turbine oilD.grease
What would white exhaust smoke from a diesel engine probably mean ________．A.Late fuel injectionB.Excess combustion airC.Dribbling injector tipsD.Excessive lube oil consumption
The most significant feature of Irish landscape is（）which provide peat used for fuel.AbogsBstreamsCislandsDcliffs
单选题A leaking diesel engine fuel injector will cause（）Aprolonged maintenance intervalsBimproved atomizationCgreater fuel economyDincomplete combustion
单选题In a diesel engine, the time taken to heat the fuel particles, turn them into vapor, and bring about combustion is called （）Ainjection lagBignition delayCcompressionDturbulence lag
单选题Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.Aa shortened ignition delay periodBa lean fuel/air mixtureCexcess fuel in the combustion chamberDrapid vaporization of injected fuel droplets
单选题The term “proper metering”, as applied to a diesel fuel injection system, can be best defined as （）.Adelivering the same quantity of fuel to each cylinder for each power stroke according to engine loadBmaintaining the metering adjustment for a reasonable period under all load conditionsCtiming fuel injection to obtain maximum power and good fuel economyDdistributing the fuel to all parts of the combustion chamber for proper combustion
单选题The cetane number of a diesel fuel oil indicates its（）AViscosityBacid contentCheating valueDignition quality
单选题Proper atomization of fuel in diesel engine combustion chambers will （）.Aaffect the injection pressureBimprove combustionCreduce compression pressureDdecrease power output
单选题The rate of fuel injection in a diesel engine cylinder depends primarily on （）.Athe size of the holes in the fuel nozzleBtiming of the pumpCsupply pressure to the pumpDshape of the combustion chamber
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Significant retardation of a diesel engine fuel injection timing will result in （）Asmoother engine operationBadvanced fuel ignitionCincreased fuel economyDreduced engine power
单选题The efficient burning of fuel in a diesel engine is dependent upon the （）Atemperature of compressionBatomization of the fuelCpenetration of the fuelDall of the above
单选题The ignition quality of a diesel fuel oil is indicated by the （）Aspecific gravityBcetane numberCviscosityDcalorific valve
单选题In the cylinder of a diesel engine fuel is ignited by the（）Aspark from a plug in the pre-combustion chamberBelectrical discharge from the distributorCheat of compression within the cylinderDheat from the fuel injection nozzle
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One of function of diesel engine lubricating oil is to （）Ainduce carbon formation on cylinder wallsBimprove fuel penetration in the combustion spaceCform a friction reducing film between mating surfacesDlubricate the fuel injection
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The most common diesel engine fuel system problems are caused by （）.Aincorrect adjustmentsBdirty fuelCbroken fuel linesDexcessive vibration
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Proper dispersion of fuel in a diesel engine cylinder is dependent upon the （）Ainjection pressureBshape of combustion spaceCturbulence in combustion spaceDall of the above
单选题The most effective method in removing water from diesel fuel oil is by（）Acentrifuging the fuelBusing it in the engineCheating the fuel tanksDstarting the fuel