正确答案: D
D.活塞运动部件的对中性
题目:为了实现柴油机的设计性能和可靠运转,必须保证()。
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学习资料的答案和解析:
[单选题]柴油机气缸套与活塞环工作表面间油膜变薄或遭到破坏,是由于()等因素造成。Ⅰ.润滑不良;Ⅱ.活塞运动装置对中不良;Ⅲ.冷却不良;Ⅳ.超负荷;Ⅴ.工作表面粗糙度低。
C.Ⅰ+Ⅱ+Ⅲ+Ⅳ+Ⅴ
[单选题]液压拉伸器的液压系统中除应使用纯净的液压油外,还可使用()作为液压油。
透平油
[单选题]对于质量分布不在同一平面内,轴向长度较大的回转件,其平衡程度用()表示。
C.e•ω
[单选题]水润滑艉轴承的长度应不小于()倍的艉轴直径。
4
[单选题]As a heat engine,() energy is the source of power by which the diesel engine can be operated.
heat
[单选题]It is very important that each cylinder should be () scavenged before the charged air is compressed.
respectively
[单选题]The diameter of the crank-pins should be measured with a ().
micrometer
[单选题]The main moving parts of a diesel engine consist of the () and the pistons.
crankshaft, the connecting rods
[单选题]Which of the substances listed is satisfactorily removed from the fuel by a centrifugal oil purifier?()
Impurities