单选题引起曲轴附加弯曲应力是()所致。A主轴承磨合不良B主轴颈磨损不均匀C主轴颈过度磨损D各道主轴承磨损不均
单选题
引起曲轴附加弯曲应力是()所致。
A
主轴承磨合不良
B
主轴颈磨损不均匀
C
主轴颈过度磨损
D
各道主轴承磨损不均
参考解析
解析:
暂无解析
相关考题:
单选题船舶在行使“过境通行权”时应遵守海峡沿岸国的规定,包括()等。 Ⅰ.指定的海道; Ⅱ.规定的分道通航制; Ⅲ.航行安全和海上交通管理; Ⅳ.防止船舶造成污染。AⅠ~ⅢBⅠ,Ⅲ,ⅣCⅠ~ⅣDⅡ~Ⅳ
单选题If there has been a fire in a closed unventilated compartment it may be unsafe to enter because of ().Aunburned carbon particlesBexcess nitrogenCa lack of oxygenDexcess hydrogen
单选题我国《海洋营运船舶明火作业安全技术要求》规定,进行明火作业前,为确保安全,对下列()区域,必须考查作业舱室及毗邻的舱室。A不属于危险区域的舱室内B危险区域的舱室C不属于危险区域的开敞甲板D属于危险区域的开敞甲板
单选题关于钢材的危险性,说法错误的是:()A积载因数小,若装载部位衬垫不当易造成局部损伤B单甲板船舶全船装运钢材时会因重心低而引发在风浪中发生剧烈横摇。C因为钢材不吸水,船舶满载时货舱的体积渗透率低。D卷钢类货物若系固不当,易于移位,对船舶稳性产生不利影响。
单选题The primary danger in helicopter fires is().Aburning jet fuel running on to quarters or other areasBloss of stabilityCrotating and flying debriDheat damage to helicopter structure
单选题The additional mark ()in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is watched by duty personnel.ABRCBMCCCAUT-0DAUT-1
单选题按规范规定,船舶更新的系固设备应满足() ①为主管机关认可的形式和产品; ②具有由主管机关签发的证书; ③如无试验证书,则应按有关要求授权的验船师对其进行相应的试验。A①②③;B①③;C①②;D②③。
单选题Insulation light is located on.() of main switchboard.AParalleling panelBLoad panelCEmergency generator control paneDMain generator control pane
单选题Securing cargo by running timbers from an upper support down to the cargo,either vertically or at an angle,is called().AbracesBdunnageCshoresDtoms
单选题A claim for cargo damages may be held against the shipowner if such damage is the result of failure of the ship’s officers to().Aensure the fitness and safety of cargo spacesBensure adequate packaging of the cargoCprevent delays due to quarantine restrictionsDcorrect all defects in the ship's construction
单选题What occurs in the combustion space of a diesel engine cylinder shortly after ignition and before the piston reaches TDC?()ARapid increase in temperature with constant pressureBRapid increase in pressure with constant temperatureCRapid increase in pressure and temperatureDRapid increase in volume and decrease in pressure
单选题In a racetrack turn,to recover a man overboard,the vessel is steadied for the SECOND time after a turn of how many degrees from the original heading?()A60°B135°C180°D360°
单选题选用ISDN进行()通信是不正确的。A电话B传真C短电文D视频