单选题The cetane number rates fuels for diesel engines according to its （）Aantiknock characteristicsBignition qualitiesCrates of vaporizationDviscosity
单选题
The cetane number rates fuels for diesel engines according to its （）
A
antiknock characteristics
B
ignition qualities
C
rates of vaporization
D
viscosity
参考解析
解析：
暂无解析
相关考题：
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
Main engines as well as auxiliary engines operating on heavy fuel should have continuousoon the lubricating oil, either according tothebypass or batch principles A.filteringB.centrifugingC.depositingD.operating
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
单选题Scuffed cylinder liner wearing surfaces in a diesel engines can result from （）Achromium plating piston ringsBknurling the piston skirtCextended maximum power operationDapplying load to a cold diesel engine
单选题Diesel engines are considered safer than gasoline engines because（）.Athey are more heavily builtBthe fuel used is less volatileCthey can be easily reversedDthey operate at a lower speed
单选题（）, so they are widely used on board ship nowadays.ADiesel engines have more advantages in comparison with gasoline enginesBDiesel engines have more advantages in comparison to gasoline enginesCGasoline engines have more advantages in comparison with diesel enginesDGasoline engines have more advantages in comparison to diesel engines
单选题According to the fifth paragraph, we can infer that______.Athe total number of cops in Cerritos is no less than 53.Bgang members of nearby cities enjoy immunity in Cerritos.Cthe crime rates in Cerritos are relatively low.DLos Angeles country sheriff is responsible for the expense of policing Cerritos.
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 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Main engines as well as auxiliary engines operating on heavy fuel should have continuous on the lubricating oil, either according to the bypass or batch principles（）AfilteringBcentrifugingCdepositingDoperating
单选题Cylinders of marine diesel engines are normally cooled by （）.Asea waterBfine mineral oilCsanitary waterDfresh water
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If the firing pressures in a diesel engine are high, although the exhaust temperatures are normal, the cause may be（）Aearly injection timingBworn orifices in the injection nozzlesCworn or scored cylinder linersDusing a fuel with too low of a cetane number
单选题Some diesel engines are supercharged with a （）Aslam chargerBturbochargerCfuel atomizerDfuel injector
单选题According to the principle of two stroke diesel engine, what is the number of its efficient work stroke per revolution?（）A1/2B1C2D3
单选题According to the fifth paragraph, we can infer that _____.Athe total number of cops in Cerritos is no less than 53Bgang members of nearby cities enjoy immunity in CerritosCthe crime rates in Cerritos are relatively lowDLos Angeles country sheriff is responsible for the expense of policing Cerritos
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Fuels of high quality with their earlier ignitions will cause higher （）pressure in cylinders of a diesel engine.AcompressionBmaximumCratedDoil
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All diesel engines are classified as（）.Afour cycleBcompression ignitionCvacuum ignitionDexternal combustion
单选题The main operating characteristic of diesel engines which distinguishes them from other internal combustion engines is the （）Amethod of supplying airBcooling systemCmethod of igniting fuelDvalve operating mechanism
单选题A mixture of 45%cetane and 55% alpha-methyl-naphthalene is found to have the same ignition delay as a sample of diesel oil √The sample can be described as having a/an（）Acetane number of 55Bcetane number of 45Coctane number of 55Doctane number of 45