Carbon dioxide的中文含义是（）。A、碳氢化合物B、碳氧化合物C、一氧化碳D、二氧化碳
Carbon dioxide的中文含义是（）。
- A、碳氢化合物
- B、碳氧化合物
- C、一氧化碳
- D、二氧化碳
相关考题：
If the () of carbon dioxide in the atmosphere is increased as a result of air pollution. A. rateB. proportionC. extentD. amount
The ___________ of gases such as carbon dioxide should be stabilized at their present level. A、emissionB、emitC、radiationD、evaporation
Theoretical perfect combustion in a diesel engine yields by-products of_____.A.aldehydes and carbon dioxideB.water vapor and carbon monoxideC.nitrogen and carbon monoxideD.water vapor and carbon dioxide
In the event of fire in a machinery space，______.A.the fixed carbon dioxide system should be used only when all other means of extinguishment have failedB.the fixed carbon dioxide system should be used immediately，as it is the most efficient means of extinguishmentC.water in any form should not be used as it will spread the fireD.the space should be opened 5 minutes after flooding CO2 to prevent injury to personnel
What could result in an incorrect oxygen concentration reading on the oxygen indicator ________．A.Exposure to carbon dioxide for no more than 1 minuteB.Exposure to carbon dioxide for more than 10 minutesC.Exposure to a very low concentration of sulfur dioxide for no more than 2 minutesD.None of the above
The most effective way of applying carbon dioxide from a portable extinguisher to a fire is by ______．A.Forming a cloud cover over the flamesB.Directing the gas at the base of the flames in a slow sweeping motionC.Discharging the carbon dioxide into the heart of the flamesD.Bouncing the discharge off an adjacent bulkhead just above the burning surface
______, as the chemical extinguisher agent, should be used for an electric fire.A.dry chemical or foamB.foam or soda acidC.carbon dioxide or foamD.carbon dioxide or dry chemical
单选题As compared to carbon dioxide，dry chemical has which advantage?（）.ACleanerBEffective on metal firesCGreater rangeDMore cooling effect
填空题Glucose can be completely broken down into carbon dioxide and water when oxygen is present in the process called aerobic respiration.____
单选题The discharge from a carbon dioxide fire extinguisher should be directed（）.Aat the base of the flamesBat the center of the flamesCto the lee side of the flamesDover the tops of the flames
单选题An advantage of an ABC dry chemical over a carbon dioxide extinguisher is（）.Alack of toxicityBthe multipurpose extinguishing abilityCburn-back protectionDcooling ability
单选题The danger associated with using carbon dioxide in an enclosed space is（）.AfrostbiteBskin burnsCasphyxiationDan explosive reaction
单选题According to the passage, atmospheric carbon dioxide performs all of the following functions EXCEPT: _____.Aabsorbing radiation at visible wavelengthsBabsorbing infrared radiationCabsorbing outgoing radiation from the EarthDhelping to retain heat near the Earth’s surface
单选题If the hydrostatic release mechanism for an inflatable liferaft is not periodically serviced and becomes inoperative，it will NOT（）.Aset the water lights on immersionBrelease the dye-marker from the liferaftCfree the liferaft from the vesselDbreak the seal on the carbon dioxide cylinder
单选题An advantage of a dry chemical over a carbon dioxide fire extinguish is its（）.Agreater rangeBeffective on all types of firesCcleanlinessDAll of the above
单选题As compared to carbon dioxide,dry chemical has which advantage?（）.ACleanerBEffectiveCGreater rangeDMore cooling effect
单选题According to the Chemical Data Guide，when burning，the grade B flammable liquid，carbon disulfide produces（）.Aphosgene gasBsulfuric acid gasCsulfur dioxide gasDcarbon tetrachloride
单选题Carbon dioxide as a fire fighting agent has which advantage over other agents?（）.AIt causes minimal damageBIt is safe for personnelCIt is cheaperDIt is most effective on a per unit basis
单选题Controls for a fixed carbon dioxide system shall be mounted（）.Adirectly outside the space protected by the systemBas near the gas cylinders as possibleCin the pilothouseDon the main deck near the bow
单选题Theoretical perfect combustion in a diesel engine yields by-products of （）.Aaldehydes and carbon dioxideBwater vapor and carbon monoxideCnitrogen and carbon monoxideDwater vapor and carbon dioxide
单选题What is NOT a characteristic of carbon dioxide fire-extinguishing agents?（）AEffective even if ventilation is not shut downBWill not deteriorate in storageCNon-corrosiveDEffective on electrical equipment
单选题Which of the following statements is true concerning carbon dioxide when used as a fire extinguishing agent?（）ACarbon dioxide is corrosive when exposed to fireBCarbon dioxide should be applied slowly to a large engine room fireCIts total cooling effect is far greater than waterDIts smothering effect is excellent for class B fires
单选题Fire in an engine compartment is best extinguished with carbon dioxide gas (CO2) and by（）.Acompletely closing the compartmentBclosing the compartment except for the ventilatorsCleaving the compartment open to the airDincreasing the air flow to the compartment by blowers
判断题Natural systems can reduce the amount of carbon dioxide in the atmosphere caused by carbon emissions.A对B错
单选题Why should you wear a self-contained breathing apparatus before entering the engine room after the fixed CO2 system has been discharged to combat a major fire?（）ABecause carbon dioxide dilutes the oxygen concentration in the atmosphere and may cause asphyxiationBBecause carbon dioxide breaks down in a fire into carbon monoxide which may cause blood poisoning in the person breathing this gasCBecause carbon dioxide is a colorless and odorless gas that becomes highly toxic in the presence of high temperatures and will quickly incapacitate a person exposed to this gasDThis action is unnecessary as carbon dioxide is not poisonous nor toxic but is a relatively harmless gas