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
Persistent knocking in one cylinder of a diesel engine could be caused by（）.
A
a low load on that cylinder
B
sluggish piston ring action
C
excessive piston crown cooling
D
excessive clearance of piston pin
参考解析
解析：
暂无解析
相关考题：
Which of the following conditions could contribute to the cracking of a diesel engine cylinder head?A.Leaking seal ringB.Insufficient heat transfer from the exhaust valvesC.Blocked cooling water passages to the headD.Excessive scavenging air provided to the engine
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
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
单选题Water accumulating in the crankcase of a diesel engine could indicate（）Aa cracked cylinder linerBexcessive water in the fuelCa leaking intercoolerDexcessive moisture in the scavenge air
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If the relief valve on a diesel engine cylinder lifts, the cause could be due to （）Aliquid in the cylinderBlow compression in the cylinderChigh exhaust temperatureDpoor fuel penetration
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Which of the following conditions could contribute to the cracking of a diesel engine cylinder head?（）ALeaking seal ringBInsufficient heat transfer from the exhaust valvesCBlock cooling water passages to the headDExcessive scavenging air provided to the engine
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 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Which of the conditions listed could cause the cylinder relief valves on a large, low-speed, propulsion diesel engine to lift?（）APlugged injector nozzlesBExcessive fuel injectionCVery late injection timingDIncorrect crankshaft clearance
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Low compression in a diesel engine could be caused by（）Aworn or broken cylinder liner sealing ringsBhigh cooling water temperatureCworn or broken piston ringsDlow fuel oil pressure
单选题If a diesel engine is smoking excessively under load, the cause could be （）Alow exhaust back pressureBearly fuel injection in one of the cylindersCcompression pressure in one of the cylindersDplugged injector holes
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What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）ASpark plugBHeat of compressionCCarburetorDGlow plug
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