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單項選擇題

What is used to test a tank for oxygen content?（）

A.Combustible gas indicator
B.Vapor indicator
C.Atmosphere analyzer kit
D.None of the above

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What is the proper first aid for LPG in the eye? （）

A.Apply an ice pack to the eye
B.Keep the eyelid closed
C.Flush the eye with plenty of water
D.Rub the eye area clean

單項選擇題

Upon release to the atmosphere，LFG readily（）.

A.vaporizes
B.attacks caustically
C.rises
D.attacks corrosively

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