航海英語消防演習(xí)與作業(yè)單項(xiàng)選擇題每日一練(2019.01.18)

來源：考試資料網(wǎng)

1 CO₂ cylinders equipped with pressure actuated discharge heads will discharge automatically when（）.

2 Foam extinguishes a fire mainly by（）.

3 Fire hose should be washed with（）.

4 Flame screens are used to（）.

5 Actuating the CO₂ fixed system causes the shutdown of the（）.