单选题Large, two-stroke/cycle, main propulsion, diesel engine cylinders can be successfully pressure charged during normal operation, by using the ().Aexhaust gas temperature systemBexhaust load systemCconstant or pulse pressure systemDconstant volume system

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


参考解析

解析: 暂无解析

相关考题:

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

单选题On a large low-speed main propulsion diesel engine, lower main bearing wear is usually measured by using a/an ()Adial indicatorBoutside caliperCbridge gaugeDtram rod

单选题Telescopic pipes to the piston of a large slow-speed main propulsion diesel engine are designed to prevent ().Aexcessive crankcase pressureBexcessive lube oil temperatureCcontamination of the lube oil by waterDcontamination of the cooling water by lube oil

单选题The opening of an exhaust valve on a modem, large, low-speed, main propulsion diesel engine may be actuated by ().Adirect action of cam shaftBcompressed air pressureChydraulic “push rods”Ddirect action of the main piston moving down

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()Aone half crankshaft speed in a two-stroke cycle diesel engineBcrankshaft speed in a two-stroke cycle diesel engineCtwo times crankshaft speed in a two-stroke cycle diesel engineDone-fourth times crankshaft speed in a four-stroke cycle diesel engine

单选题Starting a large low-speed propulsion diesel engine on diesel fuel during cold weather conditions, will be made easier by ()Aincreasing the quantity of starting airBincreasing the lube oil pressureCheating the engine fuel supplyDheating the engine coolant

单选题The power developed by a large slow-speed main propulsion diesel engine is dependent upon the ()Aquantity of air it takes in and retains in the cylinders during a given time periodBproportion of trapped air that is utilized in the combustion processCthermodynamic efficiency of the engine cycleDall of the above

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 ().Astarting air and fuel pumpsBpiston cooling pumpsCexhaust valvesDall of the above

单选题The size of the exhaust valve opening is ()Amost critical in a four-stroke cycle diesel engineBmost critical in a two-stroke/cycle diesel engineCmost critical in a four-stroke/cycle diesel engine if it is turbochargedDof equal importance in a two-stroke/cycle diesel engine as in a four-stroke/cycle diesel engine

单选题Which of the two events listed occurs simultaneously in a two-stroke/cycle diesel engine?()AExhaust and scavengingBScavenging and compressionCIgnition and expansionDExhaust and compression

单选题In the cylinder head of a two-stroke/cycle diesel engine, valves are used for()Aair intakeBa fuel outletCcooling water inletsDexhausting combustion gas

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?()AWhiteBBlackCBlueDClear

单选题The exhaust system for a turbocharged two-stroke/cycle diesel engine functions to()Adischarge exhaust gases and smokeBfurnish energy to the turbochargerCreduce engine room noiseDall of the above

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 ()Abearing pressure in a four-stroke/cycle acting single diesel engine is continually reversedBbearing pressure in a two-stroke/cycle single acting diesel engine is continually reversedCthe maximum bearing pressure is higher in a single acting two-stroke/cycle diesel engineDtwo-stoke/cycle diesel engines require more complicated lubrication piping

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?()AFlywheel inertiaBAdmission of starting airCThe way of the vesselDsecuring of fuel to the cylinders

单选题In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in ().Atwo crankshaft revolutions in a two-stroke/cycle engineBtwo power strokes in a two-stroke/cycle engineCone power stroke in a two-stroke/cycle engineDtwo piston strokes in a two-stroke/cycle engine

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?()ABed plateBColumnCEntablatureDTie rod

单选题A large, low-speed, main propulsion diesel engine uses sea water to directly cool the ().Acylinder headsBexhaust valvesCscavenging airDinjectors

单选题A large two-stroke/cycle direct reversing diesel engine is to be reversedPrior to the admission of starting air you must ()Aline up the engine fore restarting with light diesel oilBreposition the fuel injection camCchange the intake and exhaust valve cam positionsDplace the starting cam in the intermediate position

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?()AIn a two-stroke/cycle engine, the rings run hotter, requiring the end gap to be greaterBSome provision must be made in a two-stroke/cycle engine to keep the rings from binding in the portsCNo 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 engineDThe 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

单选题A large, low-speed, crosshead, main propulsion diesel engine using residual fuel oils must have a cylinder oil having a ()Alow TBN valueBhigh alkaline reserveClow flash pointDhigh pour point

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()Ahas little or no internal frictionBhas a lower effective compression ratioCoperates with scavenge air under a positive pressureDoperates without energy absorbing intake and exhaust strokes

单选题The two strokes of a two-stroke/cycle diesel engine are ()Apower and intakeBintake and exhaustCexhaust and compressionDcompression and power

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 ().Ait has a longer power strokeBmore air gets into the cylinder each strokeCit develops twice as many power strokes at the same speedDhigher combustion pressure is developed

单选题In a main propulsion turbocharged diesel engine, the speed of the turbocharger varies according to the ()Agovernor droopBspeeder spring tensionCfuel rack lagDload on the engine

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 ().Alarge conical springsBcompressed air pressureChydraulic pressureDexhaust gas pressure

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 ()Aearly fuel injectionBexcessive bearing play within the running gearCoverloading of the cylinderDall of the above