正确答案: D

A，B，C均可

题目：废气锅炉的排气流动阻力不能过大，因为二冲程低速柴油机增压器后的排气背压规定一般不宜超过（）。

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学习资料的答案和解析：

[单选题]船舶动力装置的主要耗能设备是（）。Ⅰ.螺旋桨；Ⅱ.主机、发电机和辅助锅炉；Ⅲ.空气压缩机

仅Ⅱ对

[单选题]活塞销的主要损坏形式是（）。Ⅰ.磨损；Ⅱ.摩擦；Ⅲ.擦伤；Ⅳ.腐蚀；Ⅴ.裂纹。

Ⅰ＋Ⅴ

[单选题]Engage the flywheel with the （）.

turning gear

[单选题]If there is water in fuel oil, the revolution of the engine will （）.

decrease

[单选题]Once a scavenge fire is detected, fuel should be shut off from the affected cylinders and cylinder lubrication increased （） the risk of seizure.

to minimize

[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

[单选题]An automated diesel engine should normally shut down due to （）

low tube oil pressure