航海英語消防演習(xí)與作業(yè)單項選擇題每日一練(2019.01.14)

來源：考試資料網(wǎng)

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

2 Fire alarm system thermostats are actuated by（）.

3 Halon from extinguishers used on a class B fire，should be directed（）.

4 Fire in an engine compartment is best extinguished with carbon dioxide gas (CO₂) and by（）.

5 Control valves of a CO₂ system may be located within the protected space when（）.