【名词&注释】
超声波(ultrasonic)、螺旋桨(propeller)、零部件(parts)、相互配合(interwork)、十字头销(crosshead pin)
[单选题]船轴表面裂纹可采用()进行无损检测。Ⅰ.着色探伤;Ⅱ.煤油-白粉;Ⅲ.磁粉探伤;Ⅳ.超声波探伤;Ⅴ.X射线探伤。
A. Ⅱ+Ⅲ
B. Ⅰ+Ⅲ
C. Ⅰ+Ⅲ+Ⅴ
D. Ⅰ+Ⅱ+Ⅲ
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学习资料:
[单选题]拆卸机器时不必()。
A. 拆不开的零部件不得强拆
B. 对拆下的零件进行磁粉探伤
C. 相互配合的零件应做好标记
D. 拆开的孔口应遮盖封堵,避免损伤或进入异物
[单选题]换新十字头轴瓦时,十字头销(crosshead pin)与轴承下瓦在()内的接触面积不少于()。
A. 40°~60°/75%
B. 40°~60°/85%
C. 60°~90°/75%
D. 60°~90°/85%
[单选题]传动轴系是指从()间的轴及轴承。
A. 曲轴自由端到螺旋桨
B. 推力轴法兰到螺旋桨
C. 曲轴动力输出法兰到螺旋桨
D. 尾轴法兰到螺旋桨
[单选题]() the supercharge pressure is, () power an engine develops.
A. The higher;the more
B. Higher;more
C. Higher;little
D. The higher;the le
[单选题]High-speed rotating in a centrifugal purifier can produce a force () larger than the force of gravity.
A. many thousand times
B. between times
C. one time
D. at time
[单选题]The piston rings if found worn out () and supplied by shipchandler.
A. must replace
B. must to be equipped
C. has to be repaired
D. have to be renewed
[单选题]The purpose of the delivery check valve used in a diesel fuel injection jerk pump is to ().
A. assist in a quick cutoff of fuel injection
B. allow oil backflow from the injector to the helix
C. reduce fuel oil pressure between injection strokes
D. meter the quantity of fuel delivered
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