正确答案: D
同轴度
题目:当轴系同轴度测量值总偏移和总曲折落入标准值δ总max-φ总max三角形内时,表明轴系的()符合要求。
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学习资料的答案和解析:
[单选题]动力装置长期在部分负荷下工作,废热锅炉排烟温度t2过低,对废热利用设备的维护管理是()。
不利的
[单选题]当气缸套工作表面有轻微的拉痕或磨痕时,应使用()进行打磨予以消除。
油石
[单选题]Increased air () will raise scavenge efficiency and allow a greater mass of air to be compressed; more fuel may now be burned giving an increased power.
density
[单选题]The exhaust gases for a new engine should be () when the engine operates under full load.
almost invisible
[单选题]The mechanical efficiency of an engine () because losses occur in the form of friction.
is always less than 100%
[单选题]Which of the following may take place if the clearance of the main bearings are excessive?()
all the above