单选题Halon extinguishes a fire by（）.Abreaking the chain reactionBsmothering the fireCcooling the fireDcoating the fule with a nonflammable surface
单选题
Halon extinguishes a fire by（）.
A
breaking the chain reaction
B
smothering the fire
C
cooling the fire
D
coating the fule with a nonflammable surface
参考解析
解析：
暂无解析
相关考题：
73/78防污公约附则Ⅵ对船舶使用消耗臭氧层物质规定，船上可能有的"消耗臭氧层物质"包括但不限于下列各项______。Ⅰ.Halon1211;Ⅱ.Halon1301;Ⅲ.Halon2402;Ⅳ.CFC-11;Ⅴ.CFC-12;Ⅵ.CFC-113;Ⅶ.CFC-114;Ⅷ.CFC-115。A.Ⅰ+Ⅱ+ⅢB.Ⅳ+ⅤC.Ⅵ+Ⅶ+Ⅶ+ⅧD.以上全部
CO2 extinguishes a fire byA.a blanket of bubbles formed on theB.smotheringC.coolingD.isolating the heat from the fuel
CO2 extinguishes a fire by __________.A.a blanket of bubbles formed on the surface of the fireB.smotheringC.isolating the heat from the fuelD.cooling
Halogenated hydrocarbon， Halon in short form，is used on board ship as ________ ．A.fire-extinguishing mediumB.a standard fire testC.a non-combustible materialD.a fire main
材料：Pride of Le Havre is a 33，336 gross tonnage passenger/ro-ro cargo vessel operating a regular ferry service between Portsmouth and Le Havre．The vessel is fitted with bow and stern doors and is capable of carrying 590 cars and 1600 passengers．Propulsion is by four diesel engines driving through two controllable pitch propellers．Two transverse thrust units are fitted forward.The vessel had sailed from APs King George V dry dock，Southampton，just after midnight on Thursday 18 March，for engine trials．The intention was that after these trials，Pride of Le Havre would berth at Portsmouth，and re-enter service later that day．Shortly after passing the Nab Tower，the bridge fire alarm activated at 0425，indicating a fire in the machinery spaces．At about the same time，a motorman reported to the engineer watchkeeper that a fire had broken out on the starboard thermal oil pump．While initial attempts were being made to put the fire out using portable extinguishers，the chief engineer was called and the bridge informed of the situation．On confirming that the initial attempt had failed，the chief engineer advised the bridge that he proposed to use the Halon total flooding extinguishing system．The general alarm was sounded and the main engines stopped. The engine room was evacuated and sealed，with Halon being released at 0437．The coastguard and owners were told of the situation with a message being broadcast to local shipping．A fire brigade team boarded at 0641 with re-entry to machinery space at 0958．Funnel vents were re-opened at 1030 with a fire extinguishing foam blanket laid down in the main machinery space．Ventilation of the engine room started at 1210 with full electrical power available by 1330．Under the direction of the chief engineer，the engine room crew started systematically checking and preparing machinery until，at 1750，No 4 main engine was started followed shortly afterwards by No 1 main engine．Pride of Le Havre sailed under her own power back to Southampton where she re-entered the dry dock berth to undergo examination and repair．She was all fast alongside at 0033 on Friday 19 March 1999．问题：Pride of Le Havre is equipped with ________．A.4 transverse thrust units，2 propellers，2 engines and 2 vehicle doorsB.2 transverse thrust units，2 propellers，2 engines and 1 vehicle doorC.2 transverse thrust units，1 propeller，2 engines and 2 vehicle doorsD.2 transverse thrust units，2 propellers，4 engines and 2 vehicle doorsThe fire was put out by ________．A.a fire brigade teamB.the coastguardC.ownersD.the crewShould she have not been on fire，Pride of Le Havre would have re-entered the service on ________．A.FridayB.ThursdayC.19 MarchD.any day after 18 MarchThe using of the Halon total flooding extinguishing system was initially suggested by ________．A.the engineer watchkeeperB.a motormanC.the coastguard and ownersD.the chief engineer请帮忙给出每个问题的正确答案和分析，谢谢！
Foam extinguishes a fire by ______.A.shutting off the air supplyB.cooling the fuel to below ignition temperatureC.dispersing the fuelD.removing the source of ignition
Halon extinguishes a fire by ______.A.breaking the chain reactionB.smothering the fireC.cooling the fireD.coating the fuel with a nonflammable surface
Which of the following is a class A fire?下列哪一项是A类火灾（）A、Halon 卤化烃(二氟二氯甲烷)B、electrical 电气类C、liquid 液体类
CO2 and Halon extinguishers are used for electrical fire, as well as （）fire.A、commonB、oilC、electricalD、chemical
单选题Which characteristic is an advantage of Halon as a fire extinguishing medium?（）AElectrically non-conductiveBRelatively inexpensiveCEffective against chemicals containing an oxidizerDAll of the above
单选题73/78防污公约附则Ⅵ对船舶使用消耗臭氧层物质规定，船上可能有的"消耗臭氧层物质"包括但不限于下列各项（）。 Ⅰ．Halon1211； Ⅱ．Halon1301； Ⅲ．Halon2402； Ⅳ．CFC-11； Ⅴ．CFC-12； Ⅵ．CFC-113； Ⅶ．CFC-114； Ⅷ．CFC-115。AⅠ＋Ⅱ＋ⅢBⅣ＋ⅤCⅥ＋Ⅶ＋Ⅶ＋ⅧD以上全部
单选题Which is a disadvantage of Halon as a fire extinguishing medium?（）AConducts electricityBDifficult to storeCLarge volume necessary to be effectiveDIneffective in powdered metal fires
单选题An example of class "A" fire is a/an （）.Aelectrical fire in the engine roomBoil fire in the engine room bilgesCoil fire involving a grade A petroleum productDmattress fire in a stateroom
单选题Which characteristic of Halon is a disadvantage when it is used as a fire extinguishing medium?（）ALeaves a residueBCost，relative to other agentsCBreaks down while under prolonged storageDConducts electricity
单选题Halon extinguishes a fire by（）.Abreaking the chain reactionBsmothering the fireCcooling the fireDcoating the fuel with a nonflammable surface
单选题Foam extinguishes a fire by（）.Ashutting off the air supplyBcooling the fuel to below ignition temperatureCdispersing the fuelDremoving the source of ignition
单选题Which of the following statements is true concerning Halon 1301 fire extinguishing equipment?（）AThe agent is considered nontoxic at room temperature in low concentrationsBThe agent is less effective than carbon dioxideCHalon primarily extinguishes the fire by coolingDThe agent cannot be used on electrical fires because it leaves a residue
单选题Halon extinguishers used on a class C fire should be directed at the（）.Abase of the equipmentBtop of the equipmentCpower sourceDsource of the fire
单选题Halon extinguishes fire primarily by（）.AcoolingBsmotheringCshielding of radiant heatDbreaking the chain reaction
单选题Halon from extinguishers used on a class B fire，should be directed（）.Aat the top of the flamesBat the base of the fire near the edgeCin short quick burstsDtoward the upwind side of the fire