This fire extinguisher is to be used only in case of（）A、urgencyB、crisisC、immediacyD、emergency
This fire extinguisher is to be used only in case of（）
- A、urgency
- B、crisis
- C、immediacy
- D、emergency
相关考题：
What type of extinguisher should be used for an electric fire? ________A.CO2B.FormC.WaterD.Water and Form
A carbon dioxide fire extinguisher should be recharged ______.A.at least annuallyB.whenever it is below its required weightC.only if the extinguisher has been usedD.before every safety inspection
A foam-type portable fire extinguisher would be most useful in combating a fire in ______.A.solid materials such as wood or bales of fiberB.flammable liquidsC.a piece of electrical equipmentD.combustible metallic solid
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 engine compartment gasoline fire requires which type of extinguisher?______.A.Carbon dioxideB.Dry chemicalC.FoamD.All of the above
Under what conditions would the use of a Class C fire extinguisher be preferable to a Class A extinguisher? C类火灾灭火器比A类灭火器更适用于以下哪一种情况？（）A、A .When the fire involves paper products当火灾和纸制品有关时B、B .When the fire is caused by flammable products当火灾由易燃物造成C、C .When the fire involves electrical equipment当火灾和电器设备有关时D、D .When the fire is in an enclosed area当火灾发生在一个封闭空间内
Fire in the cabins. Close all fire doors and use the （）powder extinguisher.A、dryB、wetC、foamD、portable
单选题Fire prevention during welding or burning aboard any vessel should include （）.Aposting a fire watch in the immediate areaBproviding an extinguisher which is ready for immediate useCrequiring the fire watch to remain on post for 30 minutes after the completion of welding or burningDAll of the above
单选题A foam-type portable fire extinguisher is most useful in fighting a fire in（）.AgeneratorsBoil drumsCthe bridge controlsDcombustible metals
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Which portable fire extinguisher should be used on a class C fire on board a vessel?（）ACarbon dioxideBWater (stored pressure)CFoamDCarbon tetrachloride
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A foam-type portable fire extinguisher would be most useful in combating a fire in（）.Asoild materials such as wood or bales of fiberBflammable liquidsCa piece of electrical equipmentDcombustible metallic solids
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The patrolman，while on duty on a passenger vessel，must have in his possession a(n)（）.AnightstickBflashlightCpassenger list showing assigned berthsDA-I fire extinguisher
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What is the best title for this passage?AThe Dangers of a Fire.BThe Cause of a Fire.CLearn to Use a Fire Extinguisher.DBe Ready for a Fire.