单选题In which of the scavenging methods listed will the exhaust valve be located in the cylinder head?()AReturn-flowBUniflowCCross-flowDDirect flow

单选题
In which of the scavenging methods listed will the exhaust valve be located in the cylinder head?()
A

Return-flow

B

Uniflow

C

Cross-flow

D

Direct flow


参考解析

解析: 暂无解析

相关考题:

Any increase in the exhaust back pressure of a four-stroke/cycle diesel enginewill( ).A.reduce engine horsepower outputB.aid in silencing the exhaust noiseC.increase the mean effective pressureD.contribute to effective cylinder scavenging

A two stroke diesel engine exhaust temperature will be lower than a four stroke diesel engine of the same displacement because the _____. ① MEP is lower and the scavenging air is cooling the exhaust gases ② valve overlap in a four strokeA.①B.②C.① and ②D.Neither ① nor ② is correct

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

Which of the following are methods EIGRP uses to initially populate (seed) its EIGRP topology table, before learning topology data from neighbors?()A、By adding all subnets listed by the show ip route connected commandB、By adding the subnets of working interfaces over which static neighbors have been definedC、By adding subnets redistributed on the local router from another routing sourceD、By adding all subnets listed by the show ip route static command

单选题Which of the conditions listed would cause simultaneous high cylinder firing pressure and low exhaust temperature?()AImproper fuel rack positioningBLengthy opening of the exhaust valveCExcessively early injection timingDExtended light load operation

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Which of the listed problems can be a cause of low compression pressure in a diesel engine?()Aclogged air filterBcompression strokeCburned exhaust valvesDall of the above

单选题() are fitted in the exhaust system and facilitate charge removal and scavenging in each cylinder.ADiffusersBCompressorsCSteam boilersDSoot blowers

单选题Which of the engine components listed increases air charge density and helps to improve engine operating efficiency?()AIntake manifoldBWater-cooled exhaust systemCAfter-coolerDExhaust diffuser

单选题Which of the turbo-charging systems listed operates with the least average back pressure in the exhaust manifold?()AConstant volumeBConstant pressureCPulse pressureDRadial flow

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In which of the scavenging methods listed will the exhaust valve be located in the cylinder head?()AReturn-flowBUniflowCCross-flowDDirect flow

单选题High exhaust back pressure will result in an increase in ()Aturbocharger efficiencyBengine power outputCcarbon deposits on fuel injectorsDcylinder scavenging

单选题Which of the listed methods of heat transfer takes place when two substances of different temperatures are in physical contact with each other?()ARadiationBConductionCConvectionDEach of the above

单选题Scavenging is () of exhaust gases by blowing in fresh air.Athe suctionBthe compressionCthe removalDthe deliver

单选题Which of the listed set of conditions indicates early fuel injection timing?()ALoss of engine power and high exhaust temperaturesBHigher than normal firing pressure and low exhaust temperaturesCHigh fuel consumption and high exhaust temperaturesDLower than normal compression pressure and high exhaust temperature

单选题The exhaust ports of a diesel engine using the cross-flow scavenging method are opened and closed by the ()Areciprocating motion of exhaust valvesBrotary motion of the camshaftCreciprocating motion of the pistonDdeveloped differential

单选题The arrangement and shape of the cams on a diesel engine camshaft directly control which of the listed groups of operating conditions?()Aspeed, torque, and horsepower productionBfiring order, valve timing, and valve liftCfuel consumption, efficiency, and cylinder pressureDscavenge pressure, compression ratio, and exhaust pressure

单选题Any increase in the exhaust back pressure of a four-stroke/cycle diesel engine will ().Areduce engine horsepower outputBaid in silencing the exhaust noiseCincrease the mean effective pressureDcontribute to effective cylinder scavenging

单选题The process of scavenging a two-stroke/cycle diesel engine serves to()Aimprove fuel flow volumeBcool the exhaust valvesCreduce the intake air charge densityDincrease the temperature of exhaust gases

单选题The principal difference between loop scavenging and crossflow scavenging, as used in single acting diesel engines, is the ()Adirection of air flow within the cylinderBsequence of port openingCmethod of opening exhaust portsDvolume of air admitted to the cylinder

多选题Which of the following are methods EIGRP uses to initially populate (seed) its EIGRP topology table, before learning topology data from neighbors?()ABy adding all subnets listed by the show ip route connected commandBBy adding the subnets of working interfaces over which static neighbors have been definedCBy adding subnets redistributed on the local router from another routing sourceDBy adding all subnets listed by the show ip route static command

单选题When one cylinder has a lower compression pressure and higher exhaust gas temperature than any of the other engine cylinders, which of the conditions listed will indicated?()AAdvanced ignitionBClogged air intakeCLeaky exhaust valveDHigh exhaust pressure

单选题Which of the listed design features is found in an exhaust valve and NOT in an intake valve?()AHard alloy steel constructionBBeveled edges on the valve headCLow alloy steel constructionDPoppet type design

单选题Which of the routine maintenance procedures listed is required for starting air receivers?()Aover-speedingBoverloadClow exhaust temperatureDhigh crankcase pressure

单选题Which of the turbo-charging methods listed directs the exhaust gases to the turbine at fairly uniform velocity and pressure?()AConstant pressureBPulseCconstant velocityDAxial flow

单选题A two-stroke diesel engine exhaust temperature will be lower than a four-stroke diesel engine of the same displacement because the () (1) scavenging air is cooling the exhaust gases (2) exhaust cycle time is longerA(1) onlyB(2) onlyCboth (1) and (2)Dneither (1) nor (2)

单选题The exhaust ports are located around the lower part of the cylinder liner, ()the products of combustion are driven by scavenging air.Ain whichBby whichCthrough whichDfrom which