题目内容

Which of the following statements describes the function of an expansion tank in a diesel

A. Maintains a constant head on the system
B. Reduces the likelihood of air or steam pockets formation
C. Provides a low pressure point for the addition of makeup cooling water
D. All of the above

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A. 24 h
B. 36 h
C. 48 h
D. 72 h

A. 哮喘发作
B. 自发性气胸
C. 气管异物
D. 肺水肿
E. 心衰

A. 应设置在消防控制室内，未设置消防控制室时，应设置在有人值班的场所
B. 壁挂安装时，底边距地高度宜为1.3～1.5m
C. 正面操作距离应≥1.5m
D. 电动开门器的手动控制按钮应设置在防火门内侧墙面上，距门不宜超过0.5m，底边距地面高度宜为0.9m～1.3m