An ABC dry chemical fire extinguisher would be LEAST effective against a fire in ______.A.a mattressB.spilled liquids such as oil or paintC.high voltage electrical gearD.a trash can
An ABC dry chemical fire extinguisher would be LEAST effective against a fire in ______.
A.a mattress
B.spilled liquids such as oil or paint
C.high voltage electrical gear
D.a trash can
相关考题：
Which action is routinely performed at the annual servicing and inspection of a dry-chemical cartridge-operated portable fire extinguisher?A.Test the pressure gauge for correct readingB.Weigh the cartridgeC.Replace the dry chemicalD.Pressure test the discharge hose
______, 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
A portable dry chemical fire extinguisher discharges by ______.A.gravity when the extinguisher is turned upside downB.pressure from a small CO2 cartridge on the extinguisherC.air pressure from the hand pump attached to the extinguisherD.pressure from the reaction when water is mixed with the 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When must a dry chemical fire extinguisher be recharged?（）AAfter each useBWhen the air temperature exceeds 90°FCEvery 6 monthsDEvery 12 months
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What is an advantage of using foam in fire fighting?（）AIt is effective in controlling fire in flowing oil such as coming from a broken fuel lineBIt absorbs heat from materials that could cause reignitionCMost foams can be used jointly with dry chemical extinguishing agents to attack a fire by two methods of extinguishmentDOnce the surface is blanketed with foam and the fire is extinguished，no further foam is required
单选题If a CO2 fire extinguisher is not readily available, which of the listed fire extinguishers would be best suited to combat a small electrical fire in a switchboard?（）ADry chemicalBHalonCLow velocity fogDSteam
单选题A portable foam (stored-pressure type) fire extinguisher would be most useful in combating a fire in（）.AgeneratorsBoil drumsCthe bridge controlsDcombustible metals
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On a class B fire，which portable fire extinguisher would be the LEAST desirable?（）ACarbon dioxideBWater (stored pressure)CDry chemicalDFoam
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A portable dry chemical fire extinguisher discharges by（）.Agravity when the extinguisher is turned upside downBpressure from a small CO2 cartridge on the extinguisherCair pressure from the hand pump attached to the extinguisherDpressure from the reaction when water is mixed with the chemical
单选题关闭所有防火门并使用干粉灭火器。（）AClose all fire doors and use the dry powder extinguisher.BClose all fire doors and use the foam extinguisher.CClose all fire doors and use the CO2 extinguisher.DClose all fire rooms and use the dry powder extinguisher.
单选题Which types of portable extinguisher should you watch for the reflash of the fire?（）Afoam and waterBCO2 and dry chemicalCdry chemical and waterDfoam and CO2
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Recharging a previously used cartridge-operated dry-chemical extinguisher is accomplished by（）.Aauthorized fire equipment servicing personnel onlyBreplacing the propellent cartridge and refilling with powderCpuncturing the cartridge seal after installationDrecharging the cartridge and refilling it with powder
单选题An ABC dry chemical fire extinguisher would be LEAST effective against a fire in（）.Aa mattressBspilled liquids such as oil or paintChigh voltage electrical gearDa trash can
单选题A portable foam (stored-pressure type) fire extinguisher would be most useful in combating a fire in（）.AgeneratorsBoil drumsCthe bridgeDcombustible metals
单选题Which is the proper method of determining whether a portable CO2 fire extinguisher needs recharging?（）ACheck the tag to see when the extinguisher was last chargedBRelease a small amount of CO2; if the CO2 discharges，the extinguisher is acceptableCWeigh the extinguisher and compare the weight against that stamped on the valveDRecharge the extinguisher at least once each year
单选题When fighting a fire with a portable dry chemical fire extinguisher，the stream should be directed（）.Aover the top of the flamesBoff a bulkhead into the fireCin front of the fireDat the base of the fire
单选题An advantage of a dry chemical over a carbon dioxide fire extinguisher is its（）.Agreater rangeBeffectiveness on all types of firesCcleanlinessDAll of the above
单选题Dry chemical fire extinguishers are effective on which type(s) of fire?（）ABurning oilBElectricalCPaintDAll of the above