The most effective way of applying carbon dioxide from a portable extinguisher to a fire is by ______．A.Forming a cloud cover over the flamesB.Directing the gas at the base of the flames in a slow sweeping motionC.Discharging the carbon dioxide into the heart of the flamesD.Bouncing the discharge off an adjacent bulkhead just above the burning surface
The most effective way of applying carbon dioxide from a portable extinguisher to a fire is by ______．
A.Forming a cloud cover over the flames
B.Directing the gas at the base of the flames in a slow sweeping motion
C.Discharging the carbon dioxide into the heart of the flames
D.Bouncing the discharge off an adjacent bulkhead just above the burning surface
相关考题：
A squeeze-grip type carbon dioxide portable fire extinguisher has been partially discharged.It should be ______.A.replaced in its proper location if weight loss is no more than 15%B.replaced in its proper location if weight loss is no more than 25%C.labeled empty and recharged as soon as possibleD.labeled empty and replaced in its proper location regardless of weight
______, 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 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 is most useful in fighting a fire in ______.A.generatorsB.oil drumsC.the bridge controlsD.combustible metals
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
A portable foam (stored-pressure type) fire extinguisher would be most useful in combating a fire in ______.A.generatorsB.oil drumsC.the bridge controlsD.combustible metals
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
Fire in the cabins. Close all fire doors and use the （）powder extinguisher.A、dryB、wetC、foamD、portable
单选题A squeeze-grip type carbon dioxide portable fire extinguisher has been partially discharged. It should be（）.Areplaced in its proper location if weight loss is no more than 15%Breplaced in its proper location if weight loss is no more than 25%Clabeled empty and recharged as soon as possibleDlabeled empty and replaced in its proper location regardless of weight
单选题The discharge from a carbon dioxide fire extinguisher should be directed（）.Aat the base of the flamesBat the center of the flamesCto the lee side of the flamesDover the tops of the flames
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Portable foam type fire extinguishers are most effective on（）.Amattress firesBoil firesCwood firesDAll of the above
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A squeeze-grip type carbon dioxide portable fire extinguisher has been partially discharged. It should be（）.Alabeled empty and recharged as soon as possibleBreplaced in its proper location if weight loss is no more than 25%Creplaced in its proper location regardless of weightDreplaced in its proper location if weight loss is no more than 15%
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When fighting a fire on a bulkhead using a portable carbon dioxide extinguisher，the stream should be directed at the（）.Abase of the flames，moving the horn from side to side，following the flames upward as they diminishBtop of the flaming area，moving the horn from side to side，following the flames downward as they diminishCcenter of the flaming area，moving the horn vertically from top to bottomDbottom of the flaming area，moving the horn vertically to the top following the flames upward as they diminish
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 carbon dioxide fire extinguisher has been partially discharged, and should be immediately （）.Atagged and restowed properly in its rackBweighed and the charge loss recordedCgiven to the chief engineer for rechargingDtagged empty and stowed separately from charged extinguishers
单选题Which portable fire extinguisher is normally recharged in a shore facility?（）ADry chemical (cartridge-operated)BWater (cartridge-operated)CWater (pump tank)DCarbon dioxide
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When used to fight fire，carbon dioxide（）.Ais effective if used promptly on an oil fireBhas a greater cooling effect than waterCis lighter than airDis harmless to cargo and crew