You will extinguish a fire when you remove （）.A、oxygenB、carbon dioxideC、H2OD、H2
You will extinguish a fire when you remove （）.
- A、oxygen
- B、carbon dioxide
- C、H2O
- D、H2
相关考题：
In a diesel engine, when refitting piston rings you should ①check the ring gap at the smallest diameter of the cylinder ②remove carbon from the ring grooveA.①B.②C.①②D.neither ① nor ②
One of the disadvantages of using carbon dioxide to extinguish a fire in an enclosed space isA.the 'snow' which is sometimes discharged along with the gas is toxicB.prolonged exposure to high concentrations of CO2 gas causes suffocationC.rapid dissipation of the CO2 vaporD.the CO2 gas is lighter than air and a large amount is required to extinguish a fire near the deck
Which of the listed fire extinguishers cannot be easily recharged aboard ship?A.Soda acidB.Carbon dioxideC.Dry chemicalD.cartridge-operated Foam
In a diesel engine, when refitting piston rings you should______. I. check the ring gap at the smallest diameter of the cylinder II. remove carbon from the ring grooveA.I onlyB.II onlyC.both I and IID.neither I nor II
To prevent the spread of fire by conduction, you should ______.A.cool the bulkheads around the fireB.remove combustibles from direct exposureC.close all openings to the areaD.shut off all electric power
A fire starts on your vessel while refueling. You should FIRST ______.A.stop the ventilationB.sound the general alarmC.determine the source of the fireD.attempt to extinguish the fire
You install Windows 2000 Professional on your portable computer. You install an SCSI and PC card adapter, that you can use in the office to use color scanner. You use a docking station for your computer when you are in the office. You want to maximize the battery performance for your portable computer. You also want to prevent the driver from loading whenever you are away from the office. What should you do?（）A、When away from the office use Device Manager to remove the adapter. B、When away from the office configure the startup properties for the adapter to be automatic. C、Remove the computer from the docking station and start Windows 2000 Professional to disable the SCSI PC card adapter device for the current profile.D、Remove the computer from the docking station and start Windows 2000 Professional, use Device Manager to remove SCSI PC card adapter device.
单选题When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.Afilter to remove the fuel oilBuse the settler to remove the fuel oilCremove the fuel oil by centrifugingDdrain and then renew the lube oil supply
单选题To extinguish an electrical fire, you should use （）.Amechanical foamBchemical foamCcarbon dioxideDsoda acid
单选题When you hear three short blasts on the ships whistle and the same signal on the general alarm bells, you （）.Aare required to go to your life-raftBare dismissed from drillsCshould point to the man overboardDshould start the fire pump
单选题In a diesel engine, when refitting piston rings you should （） Ⅰ.check the ring gap at the smallest diameter of the cylinder Ⅱ. Remove carbon from the ring grooveAⅠ onlyBⅡ onlyCboth Ⅰ and ⅡDneither Ⅰ nor Ⅱ
单选题The four basic components of a fire are fuel, heat, oxygen and a chain reactionWhich of the following statements best describes what must be eliminated to extinguish a fire?（）AAny one component can be eliminated to extinguish a fireBAny two components must be eliminated to properly extinguish a fireCAny three components must be eliminated to properly extinguish a fireDAli four components must be eliminated to extinguish any fire
单选题When approaching a fire from win ward, you should shield firefighters from the fire by using（）Alow-velocity fogBhigh-velocity fogCa straight stream of waterDfoam spray
单选题A fire starts on your vessel while refueling. You should FIRST（）.Astop the ventilationBsound the general alarmCdetermine the source of the fireDattempt to extinguish the fire
单选题A fire starts on you vessel while refueling. You should first（）.Astop the ventilationBsound the general alarmCdetermine the source of the fireDattempt to extinguish the fire
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It is necessary to secure the forced ventilation to a compartment where there is a fire to（）.Aallow the exhaust fans to remove smokeBextinguish the fire by carbon monoxide smotheringCprevent additional oxygen from reaching the fireDprotect fire fighting personnel from smoke
单选题When fighting an electrical fire, you should first （）.Astop ventilation to the areaBstop the vesselCsecure electricity to the circuitDapply CO2 to the fire
单选题To lubricate the swivel or remove corrosion from a fire hose coupling，you should use（）.AglycerineBgraphiteCkeroseneDfresh water and soap
单选题When required to work where there may be explosive gases, you should use tools which are （）Aapproved by the Coast GuardBhigh carbon steelCfixed with a ferrous coverDnonsparking
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
单选题When fighting a spreading fire resulting from a broken fuel line, you should FIRST （）.Alook for a CO2 extinguisherBuse a soda acid extinguisherCshut off the fuel supplyDsmother the fire with rags
单选题When a fire happens, _____ if you open the hot door.Athe fire will grow more quicklyBthe electricity will be cut offCthe door will soon be on fireDthe house will fall down
单选题When fighting fires in spaces containing bottles of LPG (liquefied petroleum gas)，you should （）.Aattempt to isolate the fire from the LPGBcool the bottles or remove them from the fire areaCsee that the valves on all LPG bottles are closedDplace insulating material over the bottles