单选题How does foam extinguish an oil fire?()ABy cooling the oil below the ignition temperatureBBy removing the fuel source from the fireCBy excluding the oxygen from the fireDBy increasing the weight of the oil

单选题
How does foam extinguish an oil fire?()
A

By cooling the oil below the ignition temperature

B

By removing the fuel source from the fire

C

By excluding the oxygen from the fire

D

By increasing the weight of the oil


参考解析

解析: 暂无解析

相关考题:

One of the limitations of foam as an extinguishing agent is that foam ______.A.cannot be made with salt waterB.is heavier than oil and sinks below its surfaceC.is corrosive and a hazard to fire fightersD.conducts electricity

The BEST method of applying foam to a fire is to ______.A.spray directly on the base of the fireB.flow the foam down a nearby vertical surfaceC.sweep the fire with the foamD.spray directly on the surface of the fire

The class of fire on which a blanketing effect is essential to extinguish the fire isA.Class 'A'B.Class 'B'C.Class 'C'D.Class 'D'

In the event of a small bunker oil spill on deck occurring while bunkering, you should ____.A.wash down the area immediately with a fire hoseB.wash down the area with keroseneC.cover the area with absorbent materialD.cover the area with foam

A foam-type portable fire extinguisher is most useful in fighting a fire in ______.A.generatorsB.oil drumsC.the bridge controlsD.combustible metals

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

How does foam extinguish an oil fire ?______.A.By cooling the oil below the ignition temperatureB.By removing the fuel souce from the fireC.By excluding the oxygen from the fireD.By increasing the weight of the oil

()extinguish oil and electrical fires with water.A、DoB、DidC、NeverD、Isn’t

Never extinguish oil and electrical fires with ().A、waterB、foam extinguisherC、CO2 extinguisherD、portable extinguisher

单选题A portable foam fire extinguisher is placed in operation by()Aturning it upside downBpressing the foam leverCsqueezing the grip handleDopening the hose valve

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What is an advantage of using foam in fire fighting?()AIt is MOST effective on very hot oil fires where the temperatures of the liquid exceed 100°C (212°F)BMost foams can be used with dry chemicals to attack a fire by two methodsCFoam is effective on combustible metal firesDFoam can be made with seawater or fresh water

单选题An important step in fighting any electrical fire is to().Astop ventilationBstop the vesselCde-energize the circuitDapply water to extinguish the fire

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To extinguish an electrical fire, you should use ().Amechanical foamBchemical foamCcarbon dioxideDsoda acid

单选题Which statement about firefighting foam is TRUE?()AFoam conducts electricityBTo be most effective,foam should be directed at the base of the fireCFoam is most effective on burning liquids which are flowingDFoam can ONLY be used to extinguish class A fires

单选题Removing which will extinguish a fire?().AnitrogenBCarbon dioxideCSodliumDOxygen

单选题You will extinguish a fire when you remove().AnitrogenBoxygenCsodiumDcarbon dioxide

单选题The four basic components of a fire are fuel, heat, oxygen and a chain reactionWhich of the following statements best describes what must be eliminated to extinguish a fire?()AAny one component can be eliminated to extinguish a fireBAny two components must be eliminated to properly extinguish a fireCAny three components must be eliminated to properly extinguish a fireDAli four components must be eliminated to extinguish any fire

单选题A fire starts on you vessel while refueling. You should first().Astop the ventilationBsound the general alarmCdetermine the source of the fireDattempt to extinguish the fire

单选题When an oil fire has been extinguished, the surface of the oil should be kept covered with foam to prevent ().Aair from contacting the oil vaporsBpermitting re-ignition boiling of the heated oilCspontaneous combustion below the oil surfaceDtoxic fumes from escaping to the surface

单选题The usual method of effectively applying foam on a fire is by ().Aspraying directly on the base of the fireBflowing the foam down a vertical surfaceCsweeping the fire before you with the foamDspraying directly on the surface of the fire

单选题The BEST method of applying foam to a fire is to().Aspray directly on the base of the fireBflow the foam down a nearby vertical surfaceCsweep the fire with the foamDspray directly on the surface of the fire

单选题The class of fire on which a blanketing effect is essential to extinguish the fire is ().Aclass ABclass BCclass CDclass D

单选题Foam extinguishes a fire mainly by().AcoolingBchemical actionCsmotheringDinerting the air

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0ne of the limitations of foam as an extinguishing agent is that foam().Acannot be made with salt waterBis heavierthan oil and sinks below its surfaceCis corrosive and to fire fightersDconducts electricity

单选题In the event of a small bunker oil spill on deck occurring while bunkering, you should ().Awash down the area immediately with a fire hoseBwash down the area with keroseneCcover the area with absorbent materialDcover the area with foam