【名词&注释】
螺旋桨(propeller)、活塞环(piston ring)、不符合(inconformity)
[单选题]中间轴常见的失效形式有()。
A. A.磨损
B. B.腐蚀
C. C.裂纹
D. D.断裂
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学习资料:
[单选题]在船上吊缸检查活塞组件时,不必检测()。
A. 活塞环的弹力
B. 天地间隙
C. 搭口间隙
D. 活塞环的金相组织和硬度
[单选题]检验发现轴系的同轴度不符合要求,为了调整轴系状态,可采用()的修理方案。Ⅰ.调节第一道中间轴承位置;Ⅱ.调节各道中间轴承位置;Ⅲ.偏心镗削艉轴承;Ⅳ.改变主机位置;Ⅴ.改变局部中间轴承位置。
A. Ⅱ+Ⅲ
B. Ⅰ+Ⅱ+Ⅳ
C. Ⅲ+Ⅳ
D. Ⅰ+Ⅲ+Ⅳ
[单选题]为了检验螺旋桨的螺距应计算出()。Ⅰ.局部螺距;Ⅱ.螺旋桨总螺距;Ⅲ.截面螺距;Ⅳ.桨叶平均螺距;Ⅴ.螺旋桨总平均螺距。
A. Ⅰ+Ⅱ
B. Ⅰ+Ⅲ+Ⅳ+Ⅴ
C. Ⅲ+Ⅳ+Ⅴ
D. Ⅰ+Ⅱ+Ⅲ+Ⅳ
[单选题]The power generated in the turbine must () that required by the compressor.
A. be less than
B. be larger than
C. be as large as
D. not be so large a
[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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