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【单项选择题】

Actuating the CO<sub>2</sub> fixed system causes the shutdown of the（）.

A、A.fuel supply

B、B.exhaust ventilation

C、C.supply and exhaust ventilation

D、D.mechanical and natural ventilation

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更多“Actuating the CO<sub>2</sub> fixed system causes the shutdown of the（）.”相关的问题
第1题
[单选题] 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 CO<sub>2sub>,semi-portable CO<sub>2sub>, then hand portable CO<sub>2sub>  B、Semi-portable CO<sub>2sub>, fixedCO<sub>2sub>, then hand portable CO<sub>2sub>  C、Hand portable, semi-portable CO<sub>2sub>, then as a last resort the fixed CO<sub>2sub> system  D、Hand portable, fixed CO<sub>2sub>, then as a last resort the semi-portable CO<sub>2sub>  

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第2题
[单选题] 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 CO<sub>2sub>; if the CO<sub>2sub> 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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第3题
[单选题] 气体分析中，CO、CO2、O2的吸收顺序是（）。

A、CO、CO<sub>2sub>、O<sub>2sub>  B、CO<sub>2sub>、O<sub>2sub>、CO  C、O<sub>2sub>、CO、CO<sub>2sub>  D、O<sub>2sub>、CO<sub>2sub>、CO  

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第4题
[单选题] The disadvantage of using CO2 is that the（）.

A、CO<sub>2sub> does not cool the fire  B、cylinders are regulated pressure vessels  C、C0<sub>2sub> is not effective on class B fires  D、C0<sub>2sub> is not effective on class C fires  

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第5题
[单选题] Your vessel is equipped with a fixed CO2 system and a fire main system. In the event of an electrical fire in the engine room what is the correct procedure for fighting the fire?（）

A、Use the CO<sub>2sub> system and evacuate the engine room  B、Use the fire main system and evacuate the engine room  C、Evacuate the engine room and use the CO<sub>2sub> system  D、Evacuate the engine room and use the fire main system  

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第6题
[单选题] After extinguishing a fire with CO2，it is advisable to（）.

A、use all CO<sub>2sub> available to cool the surrounding area  B、stand by with water or other agents  C、thoroughly ventilate the space of CO<sub>2sub>  D、jettison all burning materials  

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第7题
[单选题] Which of the listed fire extinguishers is recommended for use on an electrical switchboard fire?（）

A、CO<sub>2sub>  B、ABC dry chemical  C、CO<sub>2 sub>propelled foam  D、All of the above  

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第8题
[单选题] In order to release CO2 to the machinery spaces from a fixed fire extinguishing system, you must（）.

A、actuate an alarm and open the engine room control valve  B、actuate an alarm and open the engine room CO<sub>2 sub>releasing valve  C、open the engine room control valve and shut off engine room ventilation fans  D、open the engine room control valve and then the CO<sub>2 sub>releasing valve  

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第9题
[单选题] 冲天炉熔炼中，氧化带中的主要反应为（）。

A、C+O<sub>2sub>=CO<sub>2sub>  B、CO<sub>2sub>+C=2CO<sub>2sub>  C、2CO<sub>2sub>+O<sub>2sub>=2CO<sub>2sub>  D、2CO=CO<sub>2sub>+C  

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