正确答案: D

15

题目：发动机换向时间越短其机动性越好，规定不得大于（）s。

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学习资料的答案和解析：

[单选题]当气阀阀面出现麻点、腐蚀时可采用（）工艺修复。

以上均可

[单选题]增压器自带油泵工作的可靠性与其安装质量有关，安装时应保证（）。

D．油泵轴线与转子轴线同轴

[单选题]目前，越来越多的大型海船，尤其是新造船舶均采用（）艉轴承。

白合金

[单选题]For a continuous operation diesel engine, a duplex filter unit would be the best arrangement because （）.

changing filter elements would not interrupt engine operation

[单选题]In using reduction gears to obtain efficient propeller speeds, （）.

they are connected to the engine with a flexible coupling

[单选题]White smoke exhausting from an operating diesel engine may indicate （）.

a cracked liner