网友您好, 请在下方输入框内输入要搜索的题目:

题目内容 (请给出正确答案)
单选题
“This increase in charge air density is accomplished on most modern diesel engine types by use of exhaust gas turbo-charging, in which a turbine wheel driven by exhaust from the engine is rigidly coupled to a centrifugal type air compressor” According to this sentence, we can know that increases density(), drives the compressor directly()
A

a modern diesel engine;a turbine wheel

B

a modem diesel engine;exhaust gases

C

a compressor;an exhaust gas turbocharger

D

a compressor;a turbine wheel


参考答案

参考解析
解析: 暂无解析
更多 “单选题“This increase in charge air density is accomplished on most modern diesel engine types by use of exhaust gas turbo-charging, in which a turbine wheel driven by exhaust from the engine is rigidly coupled to a centrifugal type air compressor” According to this sentence, we can know that increases density(), drives the compressor directly()A a modern diesel engine;a turbine wheelB a modem diesel engine;exhaust gasesC a compressor;an exhaust gas turbochargerD a compressor;a turbine wheel” 相关考题
考题 What is the function of the after-coolers installed in the diesel engine air intake system?A.Decrease the air densityB.Increase the exhaust temperatureC.Decrease the lube oil temperatureD.Increase the air density

考题 Exhaust gases are generally removed from the cylinders of a two-stroke/cycle diesel engine byA.natural aspirationB.masked intake valvesC.air ceilsD.scavenging air

考题 A dry-type spark arrestor removes sparks from a diesel engine exhaust by ____.A.increasing the linear velocity of the exhaust gasesB.changing directions of exhaust gas flowC.decreasing the temperature of the exhaust gasesD.accelerating the exhaust gas through a reduced size orifice

考题 The closing of the exhaust valves used on a modern, large, low-speed, main propulsion diesel engine may be directly provided by_______.A.large conical springsB.compressed air pressureC.hydraulic pressureD.exhaust gas pressure

考题 The high air velocity leaving the compressor of an exhaust gas turbocharger is converted to pressure in the_______.A.inlet nozzle ringB.turbine wheel bladeC.diffuser passagesD.inlet volute

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

考题 The relative air pressure in the inlet manifold of a turbocharged diesel engine is usually______.A.greater than the average exhaust manifold pressureB.less than the average exhaust manifold pressureC.greater at the turbine wheel than at the impellerD.greater at reduced engine speed

考题 单选题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 Block cooling water passages to the headD Excessive scavenging air provided to the engine

考题 单选题Exhaust gases are generally removed from the cylinders of a two-stroke/cycle diesel engine by()A natural aspirationB masked intake valvesC air cellsD scavenging air

考题 单选题Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?()A ImpellerB CompressorC After-coolerD Exhaust differ

考题 单选题Which of the engine components listed increases air charge density and helps to improve engine operating efficiency?()A Intake manifoldB Water-cooled exhaust systemC After-coolerD Exhaust diffuser

考题 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?()A Advanced ignitionB Clogged air intakeC Leaky exhaust valveD High exhaust pressure

考题 单选题Which of the listed problems can be a cause of low compression pressure in a diesel engine?()A clogged air filterB compression strokeC burned exhaust valvesD all of the above

考题 单选题Modern engines () exhaust gas driven turbo-chargers to supply pressurized fresh air for scavenging and supercharging.A are made ofB are made fromC make use ofD are used to

考题 单选题The relative air pressure in the inlet manifold of a turbocharged diesel engine is usually()A greater than the average exhaust manifold pressureB less than the average exhaust manifold pressureC greater at the turbine wheel than at the impellerD greater at reduced engine speed

考题 单选题The exhaust gases in a supercharged two-stroke/cycle diesel engine are expelled from the cylinder by ()A pumping action of the pistonB pressure of the fuel chargeC vacuum developed in the manifoldD pressure of the fresh air charge

考题 单选题The closing of the exhaust valves used on a modern, large, low-speed, main propulsion diesel engine may be directly provided by ().A large conical springsB compressed air pressureC hydraulic pressureD exhaust gas pressure

考题 单选题If a four-stroke/cycle diesel engine is started by injecting air into the cylinder, the pistons receiving the charge of starting air must be()A on the power strokeB on the exhaust strokeC at the end of the power strokeD at the start of the intake stroke

考题 单选题"Scavenging" on a diesel engine means ().A injecting fuel oil into a cylinderB removing exhaust gases from the cylinderC forcing air into the cylinders under pressure after the exhaust valve has dosedD a combination of all the above

考题 单选题What is the function of the after-cooler installed in the diesel engine air intakes system?()A Decrease the air densityB Increase the exhaust temperatureC Decrease the lube oil temperatureD Increase the air density

考题 单选题The loss of the diesel engine cylinder air charge through leaky valves, piston rings, worn or scored liners, would be indicated by which of the following sets of conditions?()A Low compression pressure and high exhaust temperatureB Low firing pressure and high exhaust temperatureC Low compression pressure and low exhaust temperatureD Low firing pressure and low exhaust temperature

考题 单选题The high air velocity leaving the compressor of an exhaust gas turbocharger is converted to pressure in the ()A inlet nozzle ringB turbine wheel bladeC diffuser passagesD inlet vol

考题 单选题A dry-type spark arrestor removes sparks from a diesel engine exhaust by()A increasing the linear velocity of the exhaust gasesB changing directions of exhaust gas flowC decreasing the temperature of the exhaust gasesD accelerating the exhaust gas through a reduced size orifice

考题 单选题The process of scavenging a two-stroke/cycle diesel engine serves to()A improve fuel flow volumeB cool the exhaust valvesC reduce the intake air charge densityD increase the temperature of exhaust gases

考题 单选题High firing pressures and a low exhaust temperature in a diesel engine may result from ().A decreased piston to cylinder head clearanceB increased exhaust system back pressureC early fuel injection timingD low scavenge air temperature

考题 单选题Diesel engine mufflers or silencers reduce the engine exhaust noise by ()A passing the exhaust through long head pipesB diffusing exhaust vibrations through activated carbon bafflesC increasing the exhaust gas velocityD reducing the exhaust gas velocity

考题 单选题If you observe smoke coming from the turbocharger of an auxiliary diesel engine, you should()A check the air filter for obstructionB check for an exhaust leakC check the exhaust temperatureD secure the engine