【名词&注释】
螺旋桨(propeller)、平均值(average)
[单选题]测量螺旋桨螺距时采用的量具是()。
A. 螺距规
B. 直尺
C. 塞尺
D. 桥规
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学习资料:
[单选题]船轴工作轴颈磨损后,经测量表明()超标准时应予以修复。Ⅰ.圆度;Ⅱ.圆柱度;Ⅲ.椭圆度;Ⅳ.法兰径向跳动;Ⅴ.法兰端面跳动。
A. Ⅱ+Ⅲ
B. Ⅰ+Ⅱ+Ⅳ
C. Ⅰ+Ⅱ+Ⅴ
D. Ⅰ+Ⅲ+Ⅳ
[单选题]桨叶平均螺距为桨叶上各半径截面的()的算术平均值。
A. 局部螺距
B. 截面螺距
C. 总平均螺距
D. 平均螺距
[单选题]舵杆上()的纵向裂纹可焊补修理。
A. 长度<1/4公称直径、深度<10%公称直径
B. 长度<1/5公称直径、深度<10%公称直径
C. 数量不超过2条且不在同一条直线上
D. 数量不超过4条
[单选题]Fuel injection uses the jet pump system and a Woodward type hydraulic () is used to control engine speed.
A. controller
B. governor
C. instrument
D. apparatu
[单选题]The development of oils () the increasing demands made by the steady rise in powers produced by modem diesels.
A. has kept pace with
B. has kept pace to
C. has made pace with
D. has made pace to
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