单选题One of the differences between a two-stroke engine and a four-stroke engine is,（）Aa two-stroke engine can’t work without cylindersBa two-stroke engine can’t work without pistonsCa two-stroke engine can’t work without crankshaftsDa two-stroke engine can’t work without a blower
单选题
One of the differences between a two-stroke engine and a four-stroke engine is,（）
A
a two-stroke engine can’t work without cylinders
B
a two-stroke engine can’t work without pistons
C
a two-stroke engine can’t work without crankshafts
D
a two-stroke engine can’t work without a blower
参考解析
解析：
暂无解析
相关考题：
_____ the engines, the diesel engine is ____ used engine on boardA.Between / more commonlyB.Among / the most commonlyC.Between / not more commonlyD.Among / not the most commonly
There are no major differences between how one reads in one’s mother tongue and how one reads in a foreign language.（）A对B错
There are no major differences between how one reads in one’s mother tongue and how one reads in a foreign language.（）
单选题（）is the main reason that reduces the power advantage of a two-stroke engine over a same size four-stroke one to about（）AInefficient scavenging；twiceBInefficient scavenging；1~8 timesCFewer strokes in a circle；twiceDFewer strokes in a circle；1~8 times
单选题An indicator card or pressure-volume diagram, shows graphically the （）Acompression ratio of the engineBvolume of the engineCrelationships between pressure and volume during one stroke of the engineDrelationships between pressure and volume during one cycle of the engine
判断题There are no major differences between how one reads in one’s mother tongue and how one reads in a foreign language.（）A对B错
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There are radical differences between binary and decimal _____.AdivisionBdistributionCmultiplicationDnumeration
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Two-stroke engine turbocharging is achieved by two distinct methods, （） termed the constant pressure and the pulse system.ArespectableBrespectfulCrespectiveDrespectively
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In a two-stroke/cycle diesel engine, the exhaust gases are expelled from the cylinder by the（）Aexhaust manifoldBvalve bridgeCpressure of the fresh air chargeDvalve adjusting gear
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One of the differences between a two-stroke engine and a four-stroke engine is,（）Aa two-stroke engine works without exhaust operationBa two-stroke engine works without compression strokeCa two-stroke engine works without expansion strokeDa two-stroke engine works without suction operation
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（）uses one or two high pressure pumps for all the cylinders with one more standby, while（）have a separate high-pressure pump for each cylinder.AA common rail engine；conventional enginesBA conventional engine；common rail enginesCA marine diesel engine；most other enginesDA two-stroke engine；four-stroke engines
单选题One of function of diesel engine lubricating oil is to （）Ainduce carbon formation on cylinder wallsBimprove fuel penetration in the combustion spaceCform a friction reducing film between mating surfacesDlubricate the fuel injection
单选题One of the main differences between the various types of screw pumps is in the （）.Astuffing box diameterBdirection of rotation of the screwsCpitch of the screwsDtype of driving gears
单选题A six-cylinder, two-stroke/cycle diesel engine is fitted with a rotary distributing air starting systemThe speed of the rotating distributor disc is （）Aone-half engine speedBthe same as engine speedCtwice engine speedDfour times engine speed