If the engine does start on air, but combustion does not imm

【名词&注释】

喷油器(injector)、铜合金(copper alloy)、密封性试验(leak test)

[单选题]If the engine does start on air, but combustion does not immediately begin, the cause may be （）.

A. failure of the fuel pumps
B. starting air pressure too low
C. stop valve in air line closed
D. the turning gear still engaged

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学习资料：

[单选题]船上吊缸检修一般不必进行（）。

A. 喷油器启阀压力试验
B. 喷油器雾化试验
C. 柱塞偶件的密封性试验
D. 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。

A. Ⅱ＋Ⅲ
B. Ⅰ＋Ⅱ＋Ⅳ＋Ⅴ
C. Ⅲ＋Ⅳ＋Ⅴ
D. Ⅰ＋Ⅲ＋Ⅳ

[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

A. (4)-(2)-(3)-(1)
B. (4)-(3)-(1)-(2)
C. (4)-(3)-(2)-(1)
D. (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 （）.

A. starting air and fuel pumps
B. piston cooling pumps
C. exhaust valves
D. all of the above

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