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
Large, two-stroke/cycle, main propulsion, diesel engine cylinders can be successfully pressure charged during normal operation, by using the ().
A

exhaust gas temperature system

B

exhaust load system

C

constant or pulse pressure system

D

constant volume system


参考答案

参考解析
解析: 暂无解析
更多 “单选题Large, two-stroke/cycle, main propulsion, diesel engine cylinders can be successfully pressure charged during normal operation, by using the ().A exhaust gas temperature systemB exhaust load systemC constant or pulse pressure systemD constant volume system” 相关考题
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 单选题On a large low-speed main propulsion diesel engine, lower main bearing wear is usually measured by using a/an ()A dial indicatorB outside caliperC bridge gaugeD tram rod

考题 单选题Telescopic pipes to the piston of a large slow-speed main propulsion diesel engine are designed to prevent ().A excessive crankcase pressureB excessive lube oil temperatureC contamination of the lube oil by waterD contamination of the cooling water by lube oil

考题 单选题The opening of an exhaust valve on a modem, large, low-speed, main propulsion diesel engine may be actuated by ().A direct action of cam shaftB compressed air pressureC hydraulic “push rods”D direct action of the main piston moving down

考题 单选题The camshaft drive is designed to maintain proper camshaft speed relative to crankshaft speedIn maintaining this relationship, the camshaft drive causes the camshaft to rotate at()A one half crankshaft speed in a two-stroke cycle diesel engineB crankshaft speed in a two-stroke cycle diesel engineC two times crankshaft speed in a two-stroke cycle diesel engineD one-fourth times crankshaft speed in a four-stroke cycle diesel engine

考题 单选题Starting a large low-speed propulsion diesel engine on diesel fuel during cold weather conditions, will be made easier by ()A increasing the quantity of starting airB increasing the lube oil pressureC heating the engine fuel supplyD heating the engine coolant

考题 单选题The power developed by a large slow-speed main propulsion diesel engine is dependent upon the ()A quantity of air it takes in and retains in the cylinders during a given time periodB proportion of trapped air that is utilized in the combustion processC thermodynamic efficiency of the engine cycleD all of the above

考题 单选题In order to reverse the rotation of a two-stroke/cycle loop scavenged, direct reversing, propulsion diesel engine, the cam positions must be changed for the ().A starting air and fuel pumpsB piston cooling pumpsC exhaust valvesD all of the above

考题 单选题The size of the exhaust valve opening is ()A most critical in a four-stroke cycle diesel engineB most critical in a two-stroke/cycle diesel engineC most critical in a four-stroke/cycle diesel engine if it is turbochargedD of equal importance in a two-stroke/cycle diesel engine as in a four-stroke/cycle diesel engine

考题 单选题Which of the two events listed occurs simultaneously in a two-stroke/cycle diesel engine?()A Exhaust and scavengingB Scavenging and compressionC Ignition and expansionD Exhaust and compression

考题 单选题In the cylinder head of a two-stroke/cycle diesel engine, valves are used for()A air intakeB a fuel outletC cooling water inletsD exhausting combustion gas

考题 单选题What color exhaust will be exhibited when a slow speed two-stroke/cycle main propulsion diesel engine, designed to operate on light and heavy fuel oil, is operated on insufficiently preheated heavy fuel oil?()A WhiteB BlackC BlueD Clear

考题 单选题The exhaust system for a turbocharged two-stroke/cycle diesel engine functions to()A discharge exhaust gases and smokeB furnish energy to the turbochargerC reduce engine room noiseD all of the above

考题 单选题Proper lubrication of the main bearing is more easily obtained in a single acting four-stroke/cycle diesel engine than in a single acting two-stroke/cycle diesel engine because ()A bearing pressure in a four-stroke/cycle acting single diesel engine is continually reversedB bearing pressure in a two-stroke/cycle single acting diesel engine is continually reversedC the maximum bearing pressure is higher in a single acting two-stroke/cycle diesel engineD two-stoke/cycle diesel engines require more complicated lubrication piping

考题 单选题During maneuvering operations for a direct reversing large, low-speed, main propulsion diesel engine, which of the following actions is used to stop the shaft from turning prior to reversing the engine rotation?()A Flywheel inertiaB Admission of starting airC The way of the vesselD securing of fuel to the cylinders

考题 单选题In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in ().A two crankshaft revolutions in a two-stroke/cycle engineB two power strokes in a two-stroke/cycle engineC one power stroke in a two-stroke/cycle engineD two piston strokes in a two-stroke/cycle engine

考题 单选题In a large, slow-speed, main propulsion diesel engine, which of the parts listed is under tension when the engine is running?()A Bed plateB ColumnC EntablatureD Tie rod

考题 单选题A large, low-speed, main propulsion diesel engine uses sea water to directly cool the ().A cylinder headsB exhaust valvesC scavenging airD injectors

考题 单选题A large two-stroke/cycle direct reversing diesel engine is to be reversedPrior to the admission of starting air you must ()A line up the engine fore restarting with light diesel oilB reposition the fuel injection camC change the intake and exhaust valve cam positionsD place the starting cam in the intermediate position

考题 单选题Which of the following statements is true regarding the installation of piston rings on two-stroke/cycle, diesel engines as compared to four-stroke/cycle, diesel engines?()A In a two-stroke/cycle engine, the rings run hotter, requiring the end gap to be greaterB Some provision must be made in a two-stroke/cycle engine to keep the rings from binding in the portsC No gap is required to exist between the ends of the ring when cold in a two-stroke/cycle engine, but a small gap is required in a four-stoke/cycle engineD The gaps should be staggered on either side of a piston in a two-stroke/cycle engine, while staggering is not necessary in a four-stroke/cycle engine

考题 单选题A large, low-speed, crosshead, main propulsion diesel engine using residual fuel oils must have a cylinder oil having a ()A low TBN valueB high alkaline reserveC low flash pointD high pour point

考题 单选题A two-stroke/cycle diesel engine requires less starting air than a four-stroke/cycle diesel engine, of equal displacement, because the two-stroke/cycle diesel engine()A has little or no internal frictionB has a lower effective compression ratioC operates with scavenge air under a positive pressureD operates without energy absorbing intake and exhaust strokes

考题 单选题The two strokes of a two-stroke/cycle diesel engine are ()A power and intakeB intake and exhaustC exhaust and compressionD compression and power

考题 单选题For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four-stroke/cycle diesel engine because ().A it has a longer power strokeB more air gets into the cylinder each strokeC it develops twice as many power strokes at the same speedD higher combustion pressure is developed

考题 单选题In a main propulsion turbocharged diesel engine, the speed of the turbocharger varies according to the ()A governor droopB speeder spring tensionC fuel rack lagD load on the engine

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A possible cause for an individual piston to knock when at TDC on a slow-speed, two-stroke/cycle main propulsion diesel engine could be due to ()A early fuel injectionB excessive bearing play within the running gearC overloading of the cylinderD all of the above