单选题The ignition quality of a diesel fuel oil is indicated by the （）Aspecific gravityBcetane numberCviscosityDcalorific valve
单选题
The ignition quality of a diesel fuel oil is indicated by the （）
A
specific gravity
B
cetane number
C
viscosity
D
calorific valve
参考解析
解析：
暂无解析
相关考题：
If fuel injection to a four-stroke/cycle diesel engine begins earlier than designed, ignition may be delayed because theA.cylinder compression pressure may not be high enoughB.cylinder compression temperature may be too highC.fuel oil injection pressure may not be high enoughD.scavenge and purge process is incomplete
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
Which of the following conditions is realized by the turbo-charging of a previously naturally aspirated diesel engine?A.Ignition lag increases.B.Lube oil system pressure increases.C.Brake specific fuel consumption increases.D.Mechanical efficiency increases.
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
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Which of the listed problems would be indicated by an accumulation of water in one cylinder, in addition to the crankcase of an idle diesel engine?（）AExcessive cylinder linerBwater in the fuel systemCCracked cylinder linerDLeaking lube oil cooler
单选题Before starting a diesel engine, you should always（）Acheck the pyrometer readingsBcheck the crankcase oil levelCcheck the fuel oil strainersDclean the fuel system
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When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.Afilter to remove the fuel oilBuse the settler to remove the fuel oilCremove the fuel oil by centrifugingDdrain and then renew the lube oil supply
单选题Diesel engine lube oil diluted with fuel oil is indicated by（）Adecreased viscosityBdecreased pour pointCincreased flash pointDincreased viscosity
单选题Duty officer informs us that the vessel is out of harbor and in “Full Ahead”We are going to run （）.Adiesel oil instead of fuel oilBfuel oil instead of diesel oilCdiesel oil instead fuel oilDfuel oil instead diesel oil
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 ignition quality of a diesel fuel is indicated by the （）Acetane numberBvolatility pointCviscosity indexDoctane number
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Combustion knock occurring in a diesel engine can be caused by （）.Aexcessive fuel penetrationBprolonged injection lagCreduced ignition lagDprolonged ignition lag
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After the ship is out of the harbour and in “Full Speed”, well change （）.Ato fuel oil instead of diesel oilBfor fuel oil instead of diesel oilCto diesel oil into fuel oilDfor diesel oil into fuel oil
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Clogged diesel engine fuel oil filters can cause（）Aloss of powerBmisfiringClow fuel oil pressureDAll of the above
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