【名词&注释】
耐高温(high temperature resistance)、导热性(thermal conductivity)、高性能(high performance)、热固性树脂(thermosetting resin)、耐磨性好(good wear resistance)
[单选题]大型海船艉轴工作轴颈较长,所包覆的铜套过长,加工和安装均不便,故将铜套分段加工、套合,但必须保证()的水密性。
A. 铜套铸件
B. 安装
C. 接缝处
D. 套合
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学习资料:
[单选题]赛龙是由高性能热固性树脂合成的均质聚合物,具有()等特点。Ⅰ.弹性好;Ⅱ.耐磨性好(good wear resistance);Ⅲ.耐蚀性好;Ⅳ.导热性好;Ⅴ.耐高温。
A. Ⅱ+Ⅲ
B. Ⅰ+Ⅱ+Ⅳ+Ⅴ
C. Ⅲ+Ⅳ+Ⅴ
D. Ⅰ+Ⅱ+Ⅲ
[单选题]Fuel injectors used in heavy fuel oil systems are usually provided with cooling to reduce().
A. cold corrosion of the nozzles
B. fuel viscosity for better atomization
C. carbon accumulation on the nozzles
D. fuel detonation in the cylinder
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