航海英語(yǔ)消防用語(yǔ)單項(xiàng)選擇題每日一練(2019.01.25)

來(lái)源：考試資料網(wǎng)

1 Operation of the valve control release on a fixed CO₂ system must immediately（）.

2 How long must the records of tests and inspections of fire fighting equipment on board a ship be retained on board?（）

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

4 Regular foam can be used on all but which flammable liquid?（）

5 The brickwork surrounding the firebox of a boiler is known as（）.