问题描述：
[单选]
Prior to lighting off a cold automatically fired auxiliary boiler， you should（）．
A．check and regulate the water level
B．close the air cock once fires are lit
C．blowdown the gage glass
D．crack the steam stop to assure protective steam flow
参考答案：查看无
答案解析：无
☆收藏
答案解析：无
☆收藏
上一篇：One method of constructing large marine diesel engines and reducing the total engine frame weight is through（）．
下一篇：Which of the following statements describes the function of an expansion tank in a diesel engine cooling system？
- 我要回答: 网友(216.73.216.127)
- 热门题目: 1.充分利用技术管理指导性文件的 2.贮备可以提高可靠性，它和其他 3.并联系统比串联系统可靠性要（