What is head tank in the closed cooling water system used fo

【名词&注释】

上层建筑(superstructure)、救生艇(boat)、驾驶台(driving platform)、火灾报警器(fire alarm)、总人数

[单选题]What is head tank in the closed cooling water system used for?

A. for the release of air from the cooling water
B. providing expansion room for heated cooling water
C. a place for implementing water and water treatment agent
D. all of the above

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学习资料：

[单选题]有毒液体物质残余物排放时，要求距离最近陆地()n mile。

A. 8
B. 10
C. 12

[单选题]手揿式火灾报警器装在下面哪些处所？

A. 驾驶台
B. 上层建筑
C. 机舱
D. 以上均是

[单选题]货船上配备的救生艇应至少能容纳总人数的：

A. 50%
B. 100%
C. 200%
D. 150%

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