單項(xiàng)選擇題

Which of the following statements regarding low expansion foam and its application is INCORRECT?（）.

A.Foam should not be used on electrical fires
B.One kilo of low expansion foam solution produces much more foam
C.Foam is only efficient when it covers the top of burning combustibles
D.A stream of foam should be deflected off the deck in order to best agitate the fire

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單項(xiàng)選擇題

Which of the following is not a maritime perils?（）.

A.Stranding or grounding
B.Striking upon rocks or shoals
C.Collision between ships
D.Fire

單項(xiàng)選擇題

Which is the proper method of determining whether a portable CO₂ fire extinguisher needs recharging?（）

A.Check the tag to see when the extinguisher was last charged
B.Release a small amount of CO₂; if the CO₂ discharges，the extinguisher is acceptable
C.Weigh the extinguisher and compare the weight against that stamped on the valve
D.Recharge the extinguisher at least once each year

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Which of the following statements regarding low expansion foam and its application is INCORRECT?（）.

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Which of the following is not a maritime perils?（）.

Which is the proper method of determining whether a portable CO2 fire extinguisher needs recharging?（）

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Which is the proper method of determining whether a portable CO₂ fire extinguisher needs recharging?（）