单选题Each crank is made up of two crank webs joined by a common（） to which the bottom endbearing is fitted.AthrowBcrankshaftCcrankpinDcrosshead
单选题
Each crank is made up of two crank webs joined by a common（） to which the bottom endbearing is fitted.
A
throw
B
crankshaft
C
crankpin
D
crosshead
参考解析
解析：
暂无解析
相关考题：
We offer four courses,each()two weekly programmes. A、consisted ofB、made upC、consisting ofD、was made up of
The medical team is ______ two doctors and two nurses.A. made ofB. made up ofC. made fromD. made up
On a medium-speed main propulsion diesel engine, the crank-pin or crank journalbearings receive lubricating oil from( ).A.a spindle lubricatorB.an oil jetC.internal splashingD.drilled passages in the crankshaft
In an engine with a pot-shaped piston, some lubricating oil from the main bearing will pass along a drilled passage in the crankshaft to the bottom end bearing and then up a connection rod to theA.crossheadB.crankpinC.crank journalD.gudgeon pin
材料：While berthed alongside in Tenerife，the cruise ship Arcadia was carrying out a lifeboat drill．One lifeboat was successfully launched and as it was being recovered，the winch hoisting it failed．The lifeboat was still connected to the falls and it dropped back into the sea. To investigate what had happened，the crew had to wind the falls back onto the winch drum．The lifeboat was disconnected while the crew tried to restart the winch．They were unsuccessful because of a fault on the hand crank cutout switch．The crew then attempted to wind the falls back on using the hand crank，but because of the time and effort involved，the cutout switch was bypassed and power restored to speed up the operation．The crank handle was left in place． The winch was started．It began to turn and so too did the handle which hit one of the crew over the head．The investigation found that the winch failed in the first place because the oil used in the winch gearbox was not one recommended．It was too viscose and would have prevented the coupling locking mechanism from operating correctly．问题：It was the fault on the ________ that caused the failure to recover the lift boatA.crank handleB.hand crank cutout switchC.power systemD.fallsIt was the ________ that hit the crewmember on his head．A.fallsB.hand crank cutout switchC.crank handleD.winch drumThe cause of the accident was that ________．A.the oil used in the winch gearbox was too viscoseB.the winch drum was connected with the fallsC.the life boat was too heavyD.the bypass to the cutout switch was misused by the crewThe lesson from this accident is that ________．A.seafaring is not all about facing unforeseen situationsB.it is not necessary to wear hard hats to prevent sore headsC.the wrong oil can not have serious repercussionsD.do not start lifeboat winch motors with the crank handle in place请帮忙给出每个问题的正确答案和分析，谢谢！
“MasterCrank”和“MasterStart”电门的功能有何不同A、两个电门都按下才能启动发动机B、Crank是Start的备份，当Start电门故障时，用Crank电门启动C、Crank电门是冷转启动，不点火。Start电门是正常启动。D、两个电门没区别，按哪个都行
机组如何对发动机进行冷转操作（）A、将发动机方式选择器放在CRANK（冷转）位即可进行冷转B、将发动机方式选择器放在CRANK（冷转）位，人工起动按钮放在ON位即可进行冷转C、将发动机方式选择器放在CRANK（冷转）位，人工起动按钮放在ON位，同时将主电门放ON位，即可进行冷转
单选题The crankshaft is of the semi built type, with the journal （） the forged or cast steel crank throws.Ashrunk intoBexpanded intoCextended intoDdesignated into
单选题The backup system on an electric start survival craft is a（）.Ahydraulic systemBpneumatic systemCspare batteryDhand crank
单选题（） of an engine crankshaft can be detected by measuring deflections of crank webs for each unit of the engine.AMisalignmentBLengthCStrengthDStresses
单选题Engine （） refers to the relative time of position of crank, at which each operation during the cycle is commenced and is completed.AtimingBpowerCfiring orderDdead center
单选题The crank pin journal is provided with large bores for （）.AlubricationBcoolingCbalancing purposeDventilation
单选题Diesel engine crankshaft deflection readings are generally taken at four crank positionsGood engineering practice requires the deflection gage or indicator to be（）Aplaced as near the crankpin axis as possibleBremoved each time the crankshaft is repositionedCleft in place for all four readingsDreset to zero for all four readings
单选题Lubricating oil is supplied to the crank-pin bearings in a marine diesel engine by （）.Ainternal crankshaft passagesBimmersion in oilCsplash lubricationDinjection lubrication
单选题Operating conditions in the crank chamber are very （） those in the cylinder.Athe same asBsimilar toCseparated fromDdifferent from
单选题One method of determining crankshaft misalignment is by（）Alaying a straight edge across the crank webs at the crankpin and measuring the distance to the crankpin in two placesBmeasuring the crank drop on either side of each crank throw while the crankshaft is slowly rotated through one revolutionCrotating the crankshaft through one revolution, pausing each 90oof rotation to measure bearing clearances, top and bottomDtaking micrometer reading between the crank cheeks opposite the crankpin every 90°of crank angle rotation
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On a medium-speed main propulsion diesel engine, the crank-pin or crank journal bearings receive lubricating oil from （）.Aa spindle lubricatorBan oil jetCinternal splashingDdrilled passages in the crankshaft
单选题Engine （） refers to the relative time of position of crank, at which each operation during the cycle is commenced and is completed.AtimingBdeviationCfiring orderDphase
单选题The crank throws are displaced from （） to obtained the same number of degrees between the different crank throws.Aone anotherBthe otherCeach otherDeach others
单选题In diesel engines designed with a crosshead, the motion of the piston rod can be described as （）.Areciprocating at the piston pin, rotary at the crank pinBreciprocating at the crank pin, rotary at the piston pinCstraight reciprocationDstraight rotation
单选题The diameter of the crank-pins should be measured with a （）.AsalinometerBthermometerCtachometerDmicrometer
单选题The crank chamber oil （）.Acan be recoveredBis only supplied to cylindersConly feeds the main bearingDis a kind of detergent
单选题What is the crank angle between any two crank throws in the firing order of a four-stroke/cycle, in line, eight cylinder diesel engine?（）A45B60C90D100
名词解释题crank