【名词&注释】
螺旋桨(propeller)、耐高温(high temperature resistance)、导热性(thermal conductivity)、燃烧室(combustion chamber)、高性能(high performance)、仔细观察(careful observation)、热固性树脂(thermosetting resin)、耐磨性好(good wear resistance)、失去平衡(off balance)
[单选题]Before pumping up the crankcase oil,() should be worked by hand to minimize corrosive action on the liners.
A. the indicators
B. the starting valves
C. the cylinder lubricators
D. the turning gear
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学习资料:
[单选题]柴油机吊缸时,不正确的做法是()。
A. 起吊活塞组件之前应将缸套的磨台修磨光顺
B. 在拆卸下来的零件配合面上做好记号
C. 活塞组件吊出后应仔细观察燃烧室零件的表面状态
D. 活塞组件吊出后应用木板将气缸孔口盖住
[单选题]当气阀阀面出现麻点、腐蚀时可采用()工艺修复。
A. 机械加工
B. 喷涂或喷焊
C. 电弧堆焊
D. 以上均可
[单选题]螺旋桨的缺陷主要有()。Ⅰ.腐蚀;Ⅱ.桨脱落;Ⅲ.振动;Ⅳ.变形;Ⅴ.裂纹和折断。
A. Ⅱ+Ⅲ
B. Ⅰ+Ⅱ+Ⅳ+Ⅴ
C. Ⅰ+Ⅳ+Ⅴ
D. Ⅰ+Ⅱ+Ⅲ+Ⅳ
[单选题]航行中的螺旋桨故障主要有()。Ⅰ.振动;Ⅱ.鸣音;Ⅲ.失去平衡(off balance);Ⅳ.桨叶折断;Ⅴ.桨叶穴蚀。
A. Ⅱ+Ⅲ
B. Ⅰ+Ⅱ+Ⅳ+Ⅴ
C. Ⅲ+Ⅳ+Ⅴ
D. Ⅰ+Ⅱ+Ⅲ+Ⅳ
[单选题]转舵时声音异常并存在严重的撞击现象,其原因可能是()。
A. 舵承与舵杆、舵轴、舵销的配合间隙过大
B. 舵承与舵轴或舵销的间隙过小
C. 舵系安装不正
D. 舵杆变形
[单选题]赛龙是由高性能热固性树脂(thermosetting resin)合成的均质聚合物,具有()等特点。Ⅰ.弹性好;Ⅱ.耐磨性好(good wear resistance);Ⅲ.耐蚀性好;Ⅳ.导热性好;Ⅴ.耐高温。
A. Ⅱ+Ⅲ
B. Ⅰ+Ⅱ+Ⅳ+Ⅴ
C. Ⅲ+Ⅳ+Ⅴ
D. Ⅰ+Ⅱ+Ⅲ
[单选题]() at the end of the distribution pipe ensures that adequate pressure is maintained by the pump.
A. A relief valve
B. An alarm
C. A pressure gauge
D. A non-maim valve
[单选题]The () of the lubricant should be sufficient to hold the film together, but it should allow the lubricant to flow easily.
A. specific gravity
B. viscosity
C. acid value
D. calorific value
[单选题]The intake valves in a diesel engine are reseated by ().
A. cam followers
B. push rods
C. combustion gases
D. valve spring
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