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 carbon dioxide fire extinguisher should be recharged ______.
A.at least annually
B.whenever it is below its required weight
C.only if the extinguisher has been used
D.before every safety inspection
相关考题：
Which of the listed fire extinguishers cannot be easily recharged aboard ship?A.Soda acidB.Carbon dioxideC.Dry chemicalD.cartridge-operated Foam
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
In the event of fire in a machinery space，______.A.the fixed carbon dioxide system should be used only when all other means of extinguishment have failedB.the fixed carbon dioxide system should be used immediately，as it is the most efficient means of extinguishmentC.water in any form should not be used as it will spread the fireD.the space should be opened 5 minutes after flooding CO2 to prevent injury to personnel
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
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
Which statement concerning the application of dry chemical powder is FALSE ________．A.At temperatures of less than 32℉，the extinguisher must be recharged more oftenB.When possible，the fire should be attacked from windwardC.The stream should be directed at the base of the fireD.Directing the stream into burning flammable liquid may cause splashing
______, 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
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A fuel line breaks, sprays fuel on the hot exhaust manifold, and catches fire. Your first action should be to（）.ABatten down the engine roomBstart the fire pumpCapply carbon dioxide to the fireDshut off the fuel supply
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Weight is considered during the periodic required inspection and servicing of（）.ACO2 (carbon dioxide) fire extinguishersBfoam fire extinguishersCwater (stored pressure) fire extinguishersDAll of the above
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Portable carbon dioxide fire extinguishers should be sent ashore to be recharged （）.Awhen the remaining charge volume is less than 90 percent of the required VOLUMEBat each inspection for certificationCat each annual inspectionDwhen the weight loss exceeds 10% of weight of charge
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 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 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