正确答案: B

with compressed air

题目：“Before disconnecting the oil pipe, would you flush the oil retained in the pipe?” asked the oil barge owner （）

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学习资料的答案和解析：

[单选题]废气锅炉废气出口温度不低于155℃，锅炉进口给水循环温度，对有预热器的应高于（）℃，否则凝结的硫酸可使烟灰有粘性，增加烟垢形成的趋势。Ⅰ.120—130；Ⅱ.110—120；Ⅲ.100—110

仅Ⅰ对

[单选题]针阀体的喷孔磨损后使孔径增大（）时需要换新针阀体。

10%

[单选题]As for a diesel engine, lack of combustion air may be due to （）.

fouling turbine

[单选题]In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in （）.

two piston strokes in a two-stroke/cycle engine

[单选题]If an electric cargo winch is being used to lift a draft of cargo and the engine room loses all power，which will occur?（）

An electromagnetic brake will hold the load where it is suspended