航海英語消防用語單項選擇題每日一練(2019.01.14)

來源：考試資料網(wǎng)

1 After using a C0₂ portable extinguisher，it should be（）.

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

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3 On a ship，a fire drill shall be conducted once every（）.

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4 Small quantities of flammable liquids needed at a work site should be（）.

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5 A high-velocity fog stream can be used in fire fighting situations to drive heat and smoke ahead of the fire fighters in a passageway. This technique should only be used when（）.

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