单选题At bottom dead center, the centerline of the connecting rod usually coincides with the（）Aangularity of the piston motionBinertia moment from the pistonCcenterline of the cylinderDcenterline of the king pin
单选题
At bottom dead center, the centerline of the connecting rod usually coincides with the（）
A
angularity of the piston motion
B
inertia moment from the piston
C
centerline of the cylinder
D
centerline of the king pin
参考解析
解析：
暂无解析
相关考题：
A vessel may acquire a list if the center of gravity is ______. ① Off the centerline. ② Too high in the vessel.A.① onlyB.② onlyC.Either ① or ②D.Neither ① nor ②
An unstable upright equilibrium position on a vessel means that the metacenter is ______.A.lower than the center of gravityB.at the same height as the center of gravityC.higher than the baselineD.on the longitudinal centerline
At all angles of inclination, the metacenter is ______.A.vertically above the center of buoyancyB.vertically above the center of gravityC.at the intersection of the upright vertical centerline and the line of action of the buoyant forceD.at the geometric center of the underwater volume
从水线到船底是“吃水”。（）A、“From the centerline to the ship’s bottom” is “draft”.B、“From the keel to the ship’s bottom” is “draft”.C、The maximum distance from the waterline to the ship’s bottom is “draft”.D、“From the centerline to the ship’s main deck” is “draft”.
单选题Abnormal crankpin bearing and piston skirt surface wear indicate（）Aa restricted air intakeBa clogged connecting rod oil passageCincorrect connecting rod alignmentDhigh cylinder firing temperatures
单选题The connecting rod large end bearing shell generally has tags for location and oil grooves round the center of its axial length which correspond with grooves in the （） through which oil is transmitted up the rod to lubricate the small end.Aconnecting rodBpiston rodCbearing housingDnone of the above
单选题The design of the connecting rod large end bearing is similar to that of the mainbearings Whats the meaning of "that" in the sentence above?（）Athe connecting rodBlarge end bearingCthe main bearingDthe design
单选题The small end of the connecting rod is attached to the piston with a （）.AcrankpinBsliding wedgeCwrist pinDtorque bashing
单选题A connecting rod in a four-stroke/cycle diesel engine is subject to（）Atension load twice each crankshaft revolutionBcompression load during power and compression strokesCinertia load once every four crankshaft revolutionsDbending loads at bottom and top dead center
单选题In an engine with a pot-shaped piston, some lubricating oil from the main bearing will pass along a （） in the crankshaft to the bottom end bearing andthen up a connection rod to the gudgeon pin.Atelescopic pipesBlarge boreCdrilled passageDtied rod
单选题Which of the following operating conditions can occur when shims are removed from the joint between the foot of a marine type diesel engine connecting rod and the bearing box?（）ADecreased connecting rod bearing clearanceBIncreased connecting rod bearing clearanceCDecreased compression ratioDIncreased compression ratio
单选题A piston is at bottom dead center when it is（）Aopening the exhaust portsBclosing the fuel portsCfarthest from the cylinder headDnearest to the cylinder head
单选题Aboard a ship，multiplying a load’s weight by the distance of the load’s center of gravity from the centerline results in the load’s（）.ALCGBtransverse momentCrighting momentDinclining moment
单选题Because the top of the connecting rod swings about the pin and changes direction each time the piston reaches mid-stroke, the relative speed between bearing and pin at mid-stroke is zero, （）to a maximum as the piston approaches top or bottom dead center and then （） back to zero again as the piston approaches mid-stroke and the connecting rod changes direction.Aaccelerates；deceleratesBaccelerates；acceleratesCdecelerates；deceleratesDdecelerates；accelerates
单选题The center of buoyancy is located at the（）.Ageometric center of the waterplane areaBintersection of the vertical centerline and line of action of the buoyant forceCcenter of gravity of the vessel corrected for free surface effectsDgeometric center of the displaced volume
单选题An increase in crankcase pressure generally indicates（）Aworn connecting rod bearingsBworn engine cylinder linersChigh cylinder firing pressureDstuck spring-loaded manhole covers
单选题The lower end of each piston rod is reduced in diameter to fit a bore in （）, this being secured to the piston rod by a nut.Athe crank-webBthe connecting rodCthe main bearingDthe cross-head
单选题An acceptable method of measuring for the correct rotational force applied to the connecting rod and main bearing bolts, is to use a（）Atorque wrenchBmonkey wrenchCpipe wrenchDslugging wrench
单选题Generally the gudgeon pin is fully floating in both connecting rod small end and （）.Athe crossheadBthe crankshaftClarge endDthe piston bosses
单选题The exhaust valve opens before bottom dead center in a four stroke engine to（） Ⅰ.allow for blow down Ⅱ.Reduce pumping lossesAⅠ onlyBⅡ onlyCboth Ⅰ and ⅡDneither Ⅰ nor Ⅱ
单选题The slippers run （） in the crosshead guides as the piston and rod are （）and prevent the top of the connecting rod from moving sideways.Aup and down；reciprocatingBup and down；rotatingCback and forth；reciprocatingDback and forth；rotating
单选题An unstable upright equilibrium position on a vessel means that the metacenter is（）.Alower than the center of gravityBat the same height as the center of gravityChigher than the baselineDon the longitudinal centerline
单选题The scavenging air ports are located at （） that they are just exposed by the upper edge of the piston when the piston is in the bottom dead center position.Aso a heightBsuch a heightCso highDsuch high
单选题At all angles of inclination, the metacenter is（）.Avertically above the center of buoyancyBvertically above the center of gravityCat the intersection of the upright vertical centerline and the line of action of the buoyant forceDat the geometric center of the underwater volume
单选题Which term describes piston pins having bearing surfaces in both the piston bosses and connecting rod eye?（）AStationaryBFull floatingCSemi-floatingDFree rolling
单选题The design of （） is similar to that of the main bearing.Athe block bearingBthe camshaft bearingCthe connecting rod small end bearingDthe connecting rod large end bearing
单选题从水线到船底是“吃水”。（）A“From the centerline to the ship’s bottom” is “draft”.B“From the keel to the ship’s bottom” is “draft”.CThe maximum distance from the waterline to the ship’s bottom is “draft”.D“From the centerline to the ship’s main deck” is “draft”.