正确答案: D
不利的
题目:动力装置长期在部分负荷下工作,废热锅炉排烟温度t2过低,对废热利用设备的维护管理是()。
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学习资料的答案和解析:
[单选题]假设某一中央冷却系统中设有三台循环水泵,船舶航行在温带水域若只要两台水泵正常工作就能满足冷却需要,则三台水泵从可靠性角度看就成为()。Ⅰ.并联系统;Ⅱ.串联系统;;Ⅲ.表决系统
仅Ⅲ对
[单选题]螺旋桨经修理后应进行()和()检验。
静平衡/螺距
[单选题]() the cylinder will contain a great weight of air and will be capable of burning a great quantity of fuel.
At the beginning of the compression stroke
[单选题]Which of the following statements is true concerning an oil cooler?()
The oil pressure is greater than the cooling water pressure
[单选题]The required amount in the change of speed necessary before a governor will make a corrective movement is known as ().
sensitivity