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
How does foam extinguish an oil fire ?______.
A.By cooling the oil below the ignition temperature
B.By removing the fuel souce from the fire
C.By excluding the oxygen from the fire
D.By increasing the weight of the oil
相关考题：
Oil fires are best extinguished by ______.A.cutting off the supply of oxygenB.removing the fuelC.cooling below the ignition temperatureD.spraying with water
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
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 fire of escaping liquefied flammable gas is best extinguished by ______.A.cooling the gas below the ignition pointB.cutting off the supply of oxygenC.stopping the flow of gasD.interrupting the chain reaction
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
As an extinguishing agent, foam ______.A.conducts electricityB.should be directed at the base of the fireC.is most efffective on buring gases which are flowingD.extinguishes by cooling oil fires below ignition temperature
Foam extinguishes a fire by ______.A.shutting off the air supplyB.cooling the fuel to below ignition temperatureC.dispersing the fuelD.removing the source of ignition
Never extinguish oil and electrical fires with （）.A、waterB、foam extinguisherC、CO2 extinguisherD、portable extinguisher
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0il fires are best extinguish by（）.Acutting off supply of oxygenBremoving the fuelCcooling below the ignition temperatureDspraying with water
单选题If the cooling water temperature and the lube oil temperature in a diesel engine are too high, the cause can be （）Aa dirty lube oil strainerBinternal water leaksCan oil suction line restrictionDexcessive wears of the cooling water pump
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The FIRST course of action in fighting a fire in a cargo or fuel oil tank is to （）.Asecure all openings to the tankBdischarge an initial charge of CO2 with a hand portable extinguisherCdirect a fire hose into the tank and energize the fire mainDspray the tank boundaries with a fire hose to promote cooling
单选题As an extinguishing agent，foam（）.Aconducts electricityBshould be directed at the base of the fireCis most effective on burning gases which are flowingDextinguishes by cooling oil fires below ignition temperature
单选题As an extinguishing agent,foam（）.Acouducts electricityBshould be directed at the base of the fireCis most effective on burning gases which are flowingDextinguishes by cooling oil fires blow ignition temperature
单选题The best method of extinguishing a class A fire is to（）.Aremove oxygen from the areaBcool fuel below ignition temperatureCsmother with CO2Dsmother fire with foam
单选题Oil fires are best extinguished by（）.Acutting off the supply of oxygenBremoving the fuelCcooling below the ignition temperatureDspraying with water
单选题Which of the following statements is true concerning an oil cooler?（）AThe oil temperature is less than the cooling water temperatureBThe oil pressure is less than the cooling water pressureCThe oil pressure is greater than the cooling water pressureDThe oil flow control valve is always installed in the oil input line
单选题One result of operating a diesel engine at light load with excessively low cooling water temperature is a/an （）Adecrease in ignition lagBincrease in fuel economyCreduction in lube oil viscosityDincrease in cylinder misfiring
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Lube oil in the fresh water cooling system of a diesel engine may result from a （）Acamshaft seizureBlube oil pump failureClube oil cooler failureDlube oil pump overflow
单选题Foam extinguishes a fire by（）.Ashutting off the air supplyBcooling the fuel to below ignition temperatureCdispersing the fuelDremoving the source of ignition
单选题Shaker, circulation and spray are the three general methods used in（）Apre-injection fuel oil treatmentBlube oil filtrationClube oil purificationDpiston cooling
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
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