【名词&注释】
塑性变形(plastic deformation)、螺旋桨(propeller)、连接件(connector)、排气阀(exhaust valve)、平均值(average)、喷油泵(fuel injection pump)、推进器(propeller)、螺丝刀(screwdriver)
[单选题]船舶主推进装置包括()。
A. 主机、传动设备、轴系、推进器(propeller)
B. 尾轴、螺旋桨、首密封装置、尾密封装置
C. 螺旋桨、首侧推器、尾侧推器
D. A+B+C
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学习资料:
[单选题]在主机吊缸检修的组装过程中,经常会有连接件的螺栓孔不对中,使螺栓装不上去。尤其对粗重的管件,如起动空气管与缸头侧面的连接、排烟管与排气阀的连接等。既不损伤管件又有效的应对措施是()。
A. 用粗撬杠撬
B. 用手拉葫芦吊拉
C. 松开管件另一端法兰的连接螺栓
D. 用螺丝刀(screwdriver)或细杆插入螺栓孔扳
[单选题]液压拉伸器是利用油压使螺栓()后轻易地上紧或松脱螺栓。
A. 受拉
B. 产生变形
C. 产生弹性变形
D. 产生塑性变形
[单选题]位于喷油泵(fuel injection pump)和高压油管之间的出油阀,其作用有()。Ⅰ.止回;Ⅱ.便于排除空气;Ⅲ.缩短喷油迟后阶段;Ⅳ.控制高压油管中的剩余压力。
A. Ⅰ+Ⅲ+Ⅳ
B. Ⅰ+Ⅱ+Ⅳ
C. Ⅱ+Ⅲ
D. Ⅰ+Ⅱ+Ⅲ+Ⅳ
[单选题]桨叶上各半径截面上的截面螺距的算术平均值称为()螺距。
A. 桨叶
B. 桨叶总
C. 桨叶平均
D. 桨叶实测
[单选题]() are generally formed in the frame of the both in-line and Vee engines to give maintenance access to the crankshaft main and connecting rod large end bearing.
A. Doors
B. Aspirate gauzer
C. Coupling
D. Blind
[单选题]The diameter of the gravity disc is too big It causes oil to flow through the water outlet We changed the disc and no () is found in the water outlet.
A. water
B. oil
C. scale
D. ridge
[单选题]In a normally operating diesel engine, the main cause of lubricating oil contamination in the crankcase is a result of the ().
A. metal particles loosened by wear
B. air when no air cleaners are used
C. condensation of water vapors
D. breakdown of the lubricating oil by dilutio
[单选题]The part of a windlass which physically engages the chain during hauling or paying out is the().
A. devil's claw
B. bull gear
C. wildcat
D. cat head
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