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單項(xiàng)選擇題

Which of the petroleum products listed has the lowest flash point?（）

A.Hydraulic oil
B.Lubricating oil
C.Diesel oil
D.Refrigeration oil

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單項(xiàng)選擇題

Which of the listed fire extinguishers is recommended for use on an electrical switchboard fire?（）

A.CO₂
B.ABC dry chemical
C.CO₂propelled foam
D.All of the above

單項(xiàng)選擇題

Which of the fire extinguishing agents listed is the safest to use when combating a class C fire?（）

A.CO₂
B.Foam
C.Water fog
D.Soda acid

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