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
Which is a disadvantage of Halon as a fire extinguishing medium?（）
A
Conducts electricity
B
Difficult to store
C
Large volume necessary to be effective
D
Ineffective in powdered metal fires
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相关考题：
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
A galley grease fire on the stove may be extinguished using______．A.waterB.foamC.the range hood extinguishing systemD.fire dampers
An extinguishing agent which effectively cools, dilutes combustible vapors, removes oxygen, and provides a heat and smoke screen is ______.A.carbon dioxideB.Halon 1301C.dry chemicalD.water fog
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
Deep-fat cooking equipment shall be fitted with the following:（）A、An automatic or manual fixed extinguishing system tested to an appropriate standardacceptable to the OrganizationB、Controls for manual operation of the fire-extinguishing system which are clearlylabeled for ready use by the crewC、Arrangements for automatically shutting off the electrical power upon activation of thefire-extinguishing systemD、an alarm for indicating operation of the fire-extinguishing system in the galley wherethe equipment is installed
单选题Which extinguishing agent is recommended in the Chemical Data Guide for use on a carbon disulfide fire?（）AAlcohol foamBDry chemicalCChemical foamDWater fog
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Halon fire extinguishers are NOT effective when used on which types of fires?（）AFires in electrical equipmentBFlammable oils and greasesCClass A fires in ordinary combustiblesDMaterials containing their own oxygen
单选题A class B fire is most successfully fought by（）.Apreventing oxygen from reaching the burning materialBcooling the burning material below its ignition temperatureCusing the extinguishing agent to make the burning material fire-resistantDusing the extinguishing agent to absorb the heat
单选题The basic training in fire prevention and fire fighting should include the theoretical elements which should cover （）.Athe three elements of fire and explosionBlower and upper flammable limitsCclassification of flies and applicable extinguishing agentsDAll of the above
单选题For which of the listed classes of fire combinations would carbon dioxide be most suitable as the extinguishing agent （）.AClass A and class BBClass B and class CCClass A and class CDClass C, class D, and class E
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单选题Which extinguishing agent is NOT recommended in the Chemical Data Guide for use on a cyclohexane fire?（）AFoamBCarbon dioxideCDry chemicalDWater fog
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
多选题Deep-fat cooking equipment shall be fitted with the following:（）AAn automatic or manual fixed extinguishing system tested to an appropriate standardacceptable to the OrganizationBControls for manual operation of the fire-extinguishing system which are clearlylabeled for ready use by the crewCArrangements for automatically shutting off the electrical power upon activation of thefire-extinguishing systemDan alarm for indicating operation of the fire-extinguishing system in the galley wherethe equipment is installed
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
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单选题The best method of extinguishing a class A fire is to （）.Aremove oxygen from the areaBsmother fire with foamCsmother fire with CO2Dcool fuel below ignition temperature
单选题Which of the listed extinguishing agents is NOT suitable for fighting a liquid paint fire?（）ADry chemicalBFoamCWaterDCarbon dioxide
多选题On what conditions may an exemption certificate，exempting from the requirement to install a fixed fire extinguishing system in a cargo space，be issued？（）AThe ship is constructed and solely intended for carriage of ore， coal， grain， unseasoned timber， non-combustible cargoes or cargoes which according to the Administration constitute a low fire riskBSteel hatch covers and effective means of closing all ventilators and other openings to the cargo space are fittedCA fixed deck foam system is be fitted in lieu of the cargo space extinguishing systemDThe vessel is less than 10 000 gross tonnage
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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
单选题Generally，the first action in extinguishing an LFG fire caused by escaping gas is to（）.Asweep flames away with water sprayBshut off the leakCuse a chemical foam fire extinguisherDcall the local fire department