A distance piece, with ground faces, known as a compression

【名词&注释】

耐磨性(wear resistance)、绝缘性(insulating)、燃烧室(combustion chamber)、结构件(structural component)、组成部分(part)、不符合(inconformity)

[单选题]A distance piece, with ground faces, known as a compression plate, may be interposed between the rod and the beating housing, its thickness being chosen to ensure the correct （）.

A. compression pressure
B. compression test
C. compression ratio
D. compression clearance

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学习资料：

[单选题]早期故障是在使用开始后，因为（）而产生的故障。Ⅰ.设计与制造缺陷；Ⅱ.磨合不当；Ⅲ.维修不当

A. 仅Ⅰ对
B. Ⅰ+Ⅱ
C. Ⅰ+Ⅲ
D. Ⅰ+Ⅱ+Ⅲ

[单选题]气缸盖是柴油机的（）和燃烧室的组成部分^(part)。

A. 重要零件
B. 易损零件
C. 固定件
D. 结构件

[单选题]偏移反映了两相邻轴轴心线呈（）的状态。

A. 平行
B. 不重合
C. 不平行
D. 相交

[单选题]检验发现轴系的同轴度不符合^{(inconformity)}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]桦木层压胶木是铁梨木的代用材料，具有材质致密、坚硬、耐热、绝缘性好、成材率高，缺点是（）。Ⅰ.耐磨性差；Ⅱ.耐蚀性差；Ⅲ.耐水浸性差；Ⅳ.刚性差；Ⅴ.脆性大。

A. Ⅱ＋Ⅲ
B. Ⅰ＋Ⅴ
C. Ⅱ＋Ⅴ
D. Ⅱ＋Ⅳ

[单选题]The conclusion that mechanical efficiency is always （） 100 percent is correct.

A. small than
B. more than
C. little than
D. less tha

[单选题]The procedures recommended for auxiliary boilers having high salinity include （）.

A. treating with oxygen scavengers
B. securing the boiler and giving it a blowing down
C. increasing the pH
D. reducing the phosphate level

[单选题]High diesel engine cooling water temperatures can be caused by （）.

A. a worn water pump
B. not enough coolant
C. air in the cooling system
D. all of the above

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