单选题In a diesel engine, blow-by is generally the result of worn()Avalve guidesBoil control ringsCvalve seatsDcompression rings
单选题
In a diesel engine, blow-by is generally the result of worn()
A
valve guides
B
oil control rings
C
valve seats
D
compression rings
参考解析
解析:
暂无解析
相关考题:
Diesel engine blow-by is the leakage of combustion gases past the( ).A.oil rings onlyB.compression and scraper ringsC.cylinder liner sealingD.cylinder liner ring grooves
Low compression in a diesel engine could be caused byA.worn or broken cylinder liner sealing ringsB.high cooling water temperatureC.worn or broken piston ringsD.low fuel oil pressure
Generally speaking, the fuel injected into a marine diesel engine combustion chamber is ignited by ______.A.spark plugsB.glow plugsC.heat of compressionD.a magneto
单选题The starting of a marine diesel engine is generally carried out with the assistance of ().Acompressed airBelectricityChydraulic oilDcompressing air
单选题An increase in diesel engine crankcase pressure generally indicates excessive()Acompression pressureBlube oil header pressureCscavenge air pressureDpiston ring blow-by
单选题Worn main bearings in a diesel engine can result in ()Adecreased compression pressureBincreased lube oil pressureClower lube oil temperatureDexcessive leakage past the piston rings
单选题Generally speaking,the fuel injected into a marine diesel engine combustion chamber is ignited by().Aspark plugsBglow plugsCheat of compressionDa magneto
单选题Worn main bearing will cause the compression ratio of an auxiliary diesel engine to()AincreaseBdecreaseCremain the sameDincrease on compression decrease on expansion
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In a four-cycle diesel engine piston blow-by can result in increased()Acrankcase pressureBcompression pressureCscavenge pressureDexhaust manifold pressure
单选题Low compression of diesel engine may result from ()Aa worn cylinderBbroken piston ringsCany of A and BDnone of the above
单选题In a diesel engine, blow-by is a result of combustion gases leaking into the crankcase past the ()Awrist pin bushingsBcompression ringsCcylinder liner sealsDcylinder liner sealing ring
单选题Excessively worn, or polished ends on a diesel engine valve spring, indicate()Aburned exhaust valvesBexcessive spring compressionCspring surgeDworn valve seats
单选题Worn diesel engine intake valve guides can result in ()Aincreased engine breathing efficiencyBexcessive valve lashCexcessive lube oil consumptionDlower than normal fuel consumption
单选题Diesel engine piston ring blow-by is usually caused by excessive ring clearance at the ring()AbackBsideCgapDbottom
单选题Diesel engine blow-by is the leakage of combustion gases past the ()Aoil rings onlyBcompression and scraper ringsCcylinder liner sealingsDcylinder liner ring grooves
单选题In a diesel engine, blow-by()Aincrease exhaust back pressureBcauses excessive crankcase pressureCcan only be detected by a compression checkDdecreases fuel consumption
单选题In a four-stroke/cycle diesel engine, badly worn intake valve guides can cause excessive().Aexhaust pressureBexhaust temperaturesCcooling water temperaturesDlube oil consumption
单选题If an auxiliary diesel engine frequently stalls, the trouble may be caused by ()Alow exhaust back pressureBair in the fuel systemCgasket blow-by or leakageDincorrect assembly of idler springs
单选题Which of the following conditions can cause below normal air pressure in the intake manifold of a turbocharged diesel engine?()AExcessive piston blow-by to the manifoldBInsufficient cooling water flowCAccumulated water in the air boxesDClogged air intake filters
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Low compression pressure in a diesel engine may be the result of ()Ainsufficient fuel supply due to fuel pump valves sticking or leakingBexcessive mechanical clearance between the piston crown and cylinder headCexcessively worn fuel pump plungerDexcessive exhaust back pressure
单选题Engine coolant accumulating in the diesel engine lubricating oil can result from a ()Alow oil pressureBhigh coolant pressureCleaking fuel injectorDcracked cylinder head or liner
单选题A restricted air intake to a diesel engine may result in the engine ().Afailing to reach rated speedBknocking under maximum loadChunting or surging under light loadDoverspeeding and running away
单选题In a diesel engine, excessive cylinder liner wear will cause () Ⅰ.increased blow-by Ⅱ.wear between the piston ring and grooveAⅠonly is correctBⅡ only is correctCboth Ⅰ and Ⅱ are correctDneither Ⅰ or Ⅱ are correct
单选题Because of the close tolerances used in diesel engine fuel oil pumps, a worn plunger requires()Agrinding the spare plunger to the barrelBreplacing the plunger and the barrelChighly polishing both the plunger and barrelDreplacing plunger only
单选题Compared to a naturally aspirated diesel engine, a supercharged diesel engine has()Aa cylinder air charge of higher pressureBincreased pumping lossesCless valve overlapDreduced blow-by