單項選擇題

Blocking open or removing fire dampers can cause（）.

A.fixed foam systems to be ineffective
B.faster cooling of the fire
C.the accumulation of explosive gases
D.the fire to spread through the ventilation system

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單項選擇題

Before using a fixed CO₂ system to fight an engine room fire，you must（）.

A.secure the engine room ventilation
B.secure the machinery in the engine room
C.evacuate all engine room personnel
D.All of the above

單項選擇題

Before a tank is to be crude oil washed，the oxygen content in the tank must be measured at a position（）.

A.immediately above the level of the oil
B.at the top of the tank
C.in the vent riser
D.one meter from the deck

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Blocking open or removing fire dampers can cause（）.

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Before using a fixed CO2 system to fight an engine room fire，you must（）.

Before a tank is to be crude oil washed，the oxygen content in the tank must be measured at a position（）.

Before using a fixed CO₂ system to fight an engine room fire，you must（）.