[单选题]影响船舶动力装置可靠性的设计因素有（）。

正确答案 ：B

部件的连接方式

[单选题]喘振是（）流通部分出现气流与叶片强烈撞击和脱流的结果。

正确答案 ：A

压气机

[单选题]船轴腐蚀主要发生在（）。

正确答案 ：C

艉轴

[单选题]In an engine with air inlet valve and exhaust valve on its cylinder heads the fresh air will enter into the cylinder （） and the gases exhaust （）, there being an adequate overlap between the inlet opening and the exhaust closing.

正确答案 ：A

downwards；upwards

[单选题]Valve overlap is the period during which （）.

正确答案 ：D

both valves are ope

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