As compared to carbon dioxide, dry chemical has which advantage? ______.A.CleanerB.Effective on metal firesC.Greater rangeD.More cooling effect
As compared to carbon dioxide, dry chemical has which advantage? ______.
A.Cleaner
B.Effective on metal fires
C.Greater range
D.More cooling effect
相关考题：
Of all the extingushing agents listed below, which one has the greatest capacity for heat absorption?______.A.Water fogB.Carbon dioxideC.Dry chemicalD.Solid stream of water
Which of the following is (are)an advantage of a dry chemical extinguisher over a carbon dioxide extinguisher？The dry chemical extinguisher：Ⅰ．Has a greater range．Ⅱ．Provides a heat shield for the operator．A.ⅠonlyB.ⅡonlyC.Both Ⅰand ⅡD.Neither Ⅰ nor Ⅱ
______, 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
An advantage of a dry chemical over a carbon dioxide fire extinguisher is its ______.A.greater rangeB.effectiveness on all types of firesC.cleanlinessD.All of the above
An advantage of an ABC dry chemical over a carbon dioxide fire extinguisher is ______.A.lack of toxicityB.the multipurpose extinguishing abilityC.burn-back protectionD.cooling ability
An engine compartment gasoline fire requires which type of extinguisher?______.A.Carbon dioxideB.Dry chemicalC.FoamD.All of the above
单选题Which action is routinely performed at the annual servicing and inspection of a dry-chemical cartridge-operated portable fire extinguisher?（）ATest the pressure gauge for correct readingBWeigh the cartridgeCReplace the dry chemicalDPressure test the discharge hose
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As compared to carbon dioxide，dry chemical has which advantage?（）.ACleanerBEffective on metal firesCGreater rangeDMore cooling effect
单选题According to the passage, which of the following is true of the last hundred years?AFossil fuels were burned for the first time.BGreater amounts of land were cleared than at any time before.CThe average temperature at the Earth’s surface has become 2℃ cooler.DThe amount of carbon dioxide in the atmosphere has increased measurably.
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Flames from small leaks of LFG may be extinguished by（）.Autilizing carbon dioxide or dry chemical fire extinguishersButilizing soda and acid fire extinguishersCblowing the flames outDletting it burn itself out
单选题（）as the chemical extinguisher agent, should be used for a an electric fire.ADry chemical or foamBFoam or soda acidCcarbon dioxide or foamDcarbon dioxide or dry chemical
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The type of extinguisher which should be used for an electricity fire is（）.Afoam or soda acidBdry chemical or foamCcarbon dioxide or dry chemicalDcarbon dioxide or foam
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Which types of portable fire extinguishers are designed for use on electrical fires?（）ADry chemical and carbon dioxideBFoam (stored pressure) and soda-acidCCarbon dioxide and foam (stored pressure)DDry chemical and soda-acid
单选题Which action is routinely performed at the annual servicing and inspection of a dry-chemical cartridge-operated portable fire extinguisher?（）AInsure the chemical is powderyBReplace the cartridgeCPressure test the discharge hoseDTest the pressure gauge for proper operation
单选题A carbon dioxide fire extinguisher should be recharged（）.Aat least annuallyBwhenever it is below its required weightConly if the extinguisher has been usedDbefore every safety inspection
单选题A life raft which has inflated bottom-up on the water（）.Ashould be righted by standing on the carbon dioxide cylinder, holding the righting straps, and leaning backwardsBshould be righted by standing on the life line, holding the righting straps, and leaning backwardsCwill right itself when the canopy tubes inflateDmust be cleared of the buoyant equipment before it will right itself
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On a ship，a fixed carbon dioxide or other approved system must be installed（）.Awhere oil or chemical drums are storedBin all battery storage locationsCin paint lockersDin all of the above locations
单选题Dry chemical fire extinguishers are effective on which type(s) of fire?（）ABurning oilBElectricalCPaintDAll of the above
单选题A liferaft which has inflated bottom-up on the water（）.Ashould be righted by standing on the carbon dioxide cylinder，holding the righting straps，and leaning backwardsBshould be righted by standing on the life line，holding the righting straps，and leaning backwardsCwill right itself when the canopy tubes inflateDmust be cleared of the buoyant equipment before it will right itself