航海英語應(yīng)急部署單項選擇題每日一練(2019.01.13)

來源：考試資料網(wǎng)

1 What is meant by the term overhaul in firefighting?（）

2 To remedy a leaking fire hose connection at the hydrant，secure the valve and（）.

3 What is the most important characteristic of the extinguishing agent in fighting a class C fire?（）

4 The preferred agent used in fighting a helicopter crash fire is（）.

5 What is the most vulnerable part of the fire main system on board an offshore rig?（）