正确答案: B

阀面和阀座

题目：吊缸检查气缸盖的气阀时，主要检查（）的损伤情况。

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学习资料的答案和解析：

[单选题]机舱饱和度是表征机舱利用率的指标，由（）来表示。

B+C

[单选题]船轴工作轴颈磨损后，经测量表明（）超标准时应予以修复。Ⅰ.圆度；Ⅱ.圆柱度；Ⅲ.椭圆度；Ⅳ.法兰径向跳动；Ⅴ.法兰端面跳动。

Ⅰ＋Ⅱ＋Ⅳ

[单选题]In a （） engine the charge of air in the cylinder before compression commences is above atmospheric pressure.

pressure charged

[单选题]Which of the following conditions could cause the feed pump for an auxiliary boiler to lose suction?（）

Excessive feedwater temperature

[单选题]Which of the substances listed is satisfactorily removed from the fuel by a centrifugal oil purifier?（）

Impurities