單項選擇題

You are about to enter a compartment to investigate a suspected smoldering fireIf youre not wearing a self-contained breathing apparatus, you should test the compartments atmosphere to determine if there is/are （）.

A.sufficient oxygen to sustain human life
B.an explosive mixture in the compartment
C.a toxic atmosphere in the compartment
D.All of the above

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單項選擇題

Fire prevention during welding or burning aboard any vessel should include （）.

A.posting a fire watch in the immediate area
B.providing an extinguisher which is ready for immediate use
C.requiring the fire watch to remain on post for 30 minutes after the completion of welding or burning
D.All of the above

單項選擇題

The vapors given off by heated fuel oil are flammable, explosive, and （）

A.lighter than air
B.heavier than air
C.odorless
D.nontoxic

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You are about to enter a compartment to investigate a suspected smoldering fireIf youre not wearing a self-contained breathing apparatus, you should test the compartments atmosphere to determine if there is/are （）.

你可能感興趣的試題

Fire prevention during welding or burning aboard any vessel should include （）.

The vapors given off by heated fuel oil are flammable, explosive, and （）

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