航海英語消防用語單項選擇題每日一練(2019.01.18)

來源：考試資料網(wǎng)

1 After using a Halon extinguisher，it should be（）.

2 The atmosphere in a tank is too lean if it is（）.

3 Portable fire extinguishers must be provided for the cargo tank area of an unmanned tank barge（）.

4 The discharge from a carbon dioxide fire extinguisher should be directed（）.

5 The discharge side of every fire pump must be equipped with a（）.