正确答案: D

the turning gear still engaged

题目：If the engine does start on air, but combustion does not immediately begin, the cause may be （）.

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学习资料的答案和解析：

[单选题]船上吊缸检修一般不必进行（）。

气缸余隙测量

[单选题]水润滑艉轴承的轴承材料有（）。Ⅰ.铁梨木；Ⅱ.橡胶；Ⅲ.铜合金；Ⅳ.层压胶木；Ⅴ.合成材料。

Ⅰ＋Ⅱ＋Ⅳ＋Ⅴ

[单选题]The working cycle of a four-stroke diesel engine consists of four events:（）(1) compression(2) expansion(3) exhaust(4) suctionThe correct sequence is

(4)-(1)-(2)-(3)

[单选题]In order to reverse the rotation of a two-stroke/cycle loop scavenged, direct reversing, propulsion diesel engine, the cam positions must be changed for the （）.

starting air and fuel pumps