航海英語應急預案與EMS單項選擇題每日一練(2019.01.15)

來源：考試資料網(wǎng)

1 When must a dry chemical fire extinguisher be recharged?（）

2 Which extinguishing agent is recommended in the Chemical Data Guide for use on a carbon disulfide fire?（）

3 When used to fight fire，carbon dioxide（）.

4 Which extinguishing agent is best for use on a magnesium fire?（）

5 When fighting an oil or gasoline fire in the bilge，which of the following should NOT be used?（）