正确答案: C
the working temperature
题目:About half an hour before the engine is required, cooling water at () must be circulated.
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学习资料的答案和解析:
[单选题]废气锅炉出口排烟温度t2不应低于露点,为了最大限度利用排气余热,在标定工况下,t2=露点+△t(℃),式中△t不应小于()℃.
25
[单选题]采用尺寸选配法修理柱塞偶件或针阀偶件时,下列正确说法是()。
C.两个零件分别加工消除其几何形状误差
[单选题]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。
Ⅰ+Ⅱ+Ⅳ+Ⅴ
[单选题]检查油润滑艉轴承密封装置防蚀衬套的密封性采用()方法。
水压试验
[单选题]In a () engine the charge of air in the cylinder before compression commences is above atmospheric pressure.
pressure charged
[单选题]Lubricating oil systems for diesel engine journal bearings are usually lubricated by which of the following types of lubricating oil systems?()
Pressure
[单选题]Routine monitoring of a diesel engine should include ().
all of the above