[单选题]The fire pumps must be capable of delivering a total quantity of water at a defined head, not less than _____ of the total bilge pumping capacity.

正确答案 ：B

two-thirds

[单选题]按规定，用手动操纵装置将滑动式水密门完全关闭时间不超过( )s，且应满足在船舶向任一舷横倾至( )时也能将门关闭。

正确答案 ：A

90/15°

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