正确答案: B
Ⅰ+Ⅱ+Ⅳ+Ⅴ
题目:为了防止涡轮壳体电化学腐蚀,除用淡水冷却外,可以采用()等方法。Ⅰ.壳体表面覆盖保护膜;Ⅱ.阴极保护;Ⅲ.阳极保护;Ⅳ.淡水中加防腐剂;Ⅴ.安装防腐锌块。
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学习资料的答案和解析:
[单选题]目前,新型大型低速柴油机已全程使用重油,正常营运期间如靠泊码头、进出港都不换油。为此它的喷油器和高压油泵都有改进.其喷油器在实验台上试验,如发现喷油器内油压很低(0.5~0.8MPa)时,回油管内有大量的燃油流出,则()。
说明正常,继续升高油压,回油就会停止
[单选题]保证增压器转子受热膨胀不会产生压气机叶轮与气封板碰撞的间隙是()值。
M
[单选题]增压器转子校中时不需检测()。
各轴承的轴承间隙
[单选题]由于轴系的实际变形难以检测,通过测量轴系的相邻轴两法兰的()来了解轴系轴心线的实际状态。
偏中值
[单选题]A distance piece, with ground faces, known as a compression plate, may be interposed between the rod and the beating housing, its thickness being chosen to ensure the correct ().
compression ratio
[单选题]Fuel pump index is ().
the reading at the rack
[单选题]The trouble-free life of an engine indicates ().
the period of time during which no trouble occurs to the engine
[单选题]Auxiliary boilers are divided into several classifications, one of which is ().
water-tube forced circulation