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
Persistent knocking in one cylinder of an eight cylinder diesel engine would MOST likely be caused by______.
A.using fuel oil with low cetane number
B.a badly worn piston pin
C.a loose flywheel key
D.a loose bed plate bolt
相关考题：
One cylinder of a diesel engine is persistently knocking and does not cease(停止) when the fuel supply to that cylinder is secured.Which of the following problems may be the cause?A.Low loading of the cylinderB.Excessive cooling of that pistonC.Sluggish ring action on the pistonD.A mechanical defect in a working part
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Air scavenging of a diesel engine cylinder（）Ablows out the exhaust gasesBsupplies oxygen for combustionCcools the valves and cylinder wallsDall of the above
单选题One end of a diesel engine cylinder is sealed by the cylinder head and the other end by the （）AcrankcaseBpistonCcylinder linerDcrank cheek
单选题A practical way of checking for excessive fuel injection in one cylinder of an operating diesel engine is to （）Afeel the high pressure fuel lineBcheck the cylinder exhausts for white smoke frequentlyCcheck the cylinder exhaust temperatureDisolate each cylinder and inspect the injector
单选题Diesel engine cylinder head test cocks are used to（）Acheck cylinder lubrication prior to starting engineBconnect exhaust gas analyzers to determine engine efficiencyCpressure test cylinder heads to check for leaksDremove moisture accumulations from cylinder prior to starting
单选题Which of the listed diesel engine systems is likely to create the problem of a cylinder regularly misfiring?（）ALubricationBCoolingCFuelDElectric ignition
单选题Which of the following procedures should be carried out when a large, low-speed, diesel engine is operated with one cylinder secured?（）ALubrication to the defective cylinder should be increasedBCooling water temperature to the engine should be increasedCOnly the turbocharger speed should be reducedDEngine speed should be reduced
单选题A drop in compression pressure in one cylinder of a diesel engine can be caused by（）Aa leaking fuel injection nozzleBa clogged air filterCearly fuel injectionDburned valves
单选题The most practical way of detecting an overload in one cylinder of an operating large, low-speed ,main propulsion diesel engine is to （）Acheck the cylinder exhausts for black smokeBlisten for combustion knock in that cylinderCisolate each cylinder and inspect the injectorDcheck the cylinder exhaust temperature frequently
单选题One end of a cylinder for a medium or high-speed diesel engine is sealed by the piston and rings, the other end is sealed by the （）AcrankcaseBcylinder headCvalve coverDengine frame
单选题The term diesel engine scavenging means（）Adelivering more air into the cylinder than it would normally receive during an ordinary charging processBforcing the products of combustion out of the cylinder with the fresh air chargeCcollecting the air charge at the cleanerDcombustion and expansion of hot gas
单选题Broken intake valve springs on one cylinder of a diesel engine can cause the engine to （）AOver speedBfire improperlyClose oil pressureDoverheatrapidly
单选题How many power strokes per crankshaft revolution are there in an eight cylinder, two stroke/cycle diesel engine?（）AOneBTwoCFourDEight
单选题A change in the quality of fuel atomization by a diesel engine fuel injector would be caused by a/an （）Aincrease in engine speedBincrease in cylinder turbulenceCleaking needle valveDreduction in cylinder turbulence
单选题If water is found in the crankcase of a diesel engine, the cause may be due to（）Aa cracked cylinder headBa leaky cylinder head gasketCa cracked cylinder linerDany of the above
单选题Persistent knocking of one cylinder of a diesel engine ceases when the fuel supply to that cylinder is securedThis problem may be a result of （）Alow loading of that cylinderBfaulty combustion in that cylinderCsluggish piston ring actionDexcessive piston cooling
单选题Persistent knocking in one cylinder of a diesel engine could be caused by（）.Aa low load on that cylinderBsluggish piston ring actionCexcessive piston crown coolingDexcessive clearance of piston pin
单选题A diesel engine is warmed up and white vapor is in the exhaust，this could indicate （）Aexcessive cylinder lubricationBa lugging engineCa leaking cylinder linerDoverloading of one cylinder
单选题A faulty injection in one cylinder of an operating diesel engine can be located by （）Acutting out individual injectors and noting engine performanceBchecking lube oil temperatureCchecking cam positionDusing a timing light
单选题One remedy for a high firing pressure, in addition to a high exhaust temperature in one cylinder of a diesel engine, is to （）Aincrease scavenge air pressureBreduce fuel booster pump pressureCadjust the fuel rackDretard fuel injector timing
单选题Trunk-type diesel engine pistons are most effectively cooled by heat（）Aconducted through the engine blockBconducted to water cooled cylinder wallsCconducted through the piston crownDloss to escaping exhaust gases
单选题（）uses one or two high pressure pumps for all the cylinders with one more standby, while（）have a separate high-pressure pump for each cylinder.AA common rail engine；conventional enginesBA conventional engine；common rail enginesCA marine diesel engine；most other enginesDA two-stroke engine；four-stroke engines
单选题The function of diesel engine piston compression rings is to （）.Aprevent piston side thrustBprevent engine friction lossesCtransmit heat from the piston to the cylinder linerDremove oil from the cylinder combustion space
单选题Diesel engine cylinder head test cocks are used to （）Acheck cylinder lubricationBconnect the pressure indicator pressureCtest cylinder headsDconnect the exhaust gas pyrometers
单选题Which of the listed conditions will affective pressure the most in the cylinder of a diesel engine?（）ATBN of the lubricating oilBTemperature of the lube oilCCompleteness in the mixing of the fuel and airDTemperature of the cooling (sea) water
单选题What is the crank angle between any two crank throws in the firing order of a four-stroke/cycle, in line, eight cylinder diesel engine?（）A45B60C90D100