單項(xiàng)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

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單項(xiàng)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

單項(xiàng)選擇題

If a small fire initially breaks out in the engine room bilges, in which of the following sequences should the fire extinguishing agents or systems be used?（）

A.Fixed CO₂,semi-portable CO₂, then hand portable CO₂
B.Semi-portable CO₂, fixedCO₂, then hand portable CO₂
C.Hand portable, semi-portable CO₂, then as a last resort the fixed CO₂ system
D.Hand portable, fixed CO₂, then as a last resort the semi-portable CO₂

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

你可能感興趣的試題

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

If a small fire initially breaks out in the engine room bilges, in which of the following sequences should the fire extinguishing agents or systems be used?（）

99色精品-9色在线-99色在线-99色视频国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精