正确答案: D

氢着火

题目：废气锅炉烟道温度在1000℃以上时可能发生（）。

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学习资料的答案和解析：

[单选题]平板形舵可作成（）。Ⅰ.平衡舵；Ⅱ.穿心舵轴平衡舵；Ⅲ.半平衡舵；Ⅳ.不平衡舵；Ⅴ.完全平衡舵。

Ⅰ＋Ⅲ＋Ⅳ

[单选题]（） providing lubricating films, oil used in marine diesel engines have to remove heat from oil cooled piston.

In addition to

[单选题]The lubricating oil is pumped from the drain tank, very often with （） in the suction line.

a magnetic filter

[单选题]When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.

drain and then renew the lube oil supply