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
Oil fires are best extinguished by（）.
A
cutting off the supply of oxygen
B
removing the fuel
C
cooling below the ignition temperature
D
spraying with water
参考解析
解析：
暂无解析
相关考题：
Dry powder is used to put out ________A.electrical fireB.oil fireC.common firesD.all kinds of fires
Oil fires are best extinguished by ______.A.cutting off the supply of oxygenB.removing the fuelC.cooling below the ignition temperatureD.spraying with water
The emergency signal for fires is sounded on the ship’s whistle and general alarm as _____.A.a continuous ringing for 10 secondsB.one short ring followed by one long ringC.two long rings of at least 20 secondsD.a continuous ringing until the fire is extinguished
The fuel oil supply system to an automatic auxiliary boiler, will automatically shutdown if the boiler ______.A.steam demand is highB.salinity is highC.safety valve simmers(爆发)D.burner flame is extinguished
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
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
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A dirty diesel engine oil filter element can best be detected by （）.Avisual inspection of the elementsBthe pressure drop across the filterChigh lube oil sump temperatureDdecrease in oil viscosity from the filter
单选题A fire of escaping liquefied flammable gas is best extinguished by（）.Acooling the gas below the ignition pointBcutting off the supply of oxygenCstopping the flow of gasDinterrupting the chain reaction
单选题Engine room fires have been started by neglected oil leaks dripping on to hot pipes or exhaust manifolds （） insulation has not been replaced after maintenance.AwhichBwhenCwhoseDwhat
单选题Never extinguish oil and electrical fires with （）.AwaterBfoam extinguisherCCO2 extinguisherDportable extinguisher
单选题What is meant by the term overhaul in firefighting?（）ASlow down the spread of fire by cooling adjacent structuresBCover the fire with foamCSmother the fire with a blanket or similar objectDBreak up solid objects to ensure that any deep seated fires are extinguished
单选题Which extinguishing agent is the best for use on electrical fires?（）AFoamBCO2CDry chemicalDWater fog
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The fuel oil supply system to an automatic auxiliary boiler, will automatically shutdown if the boiler （）Asteam demand is highBsalinity is highCsafety valve simmersDburner flame is extinguished
单选题Class A fires are best extinguished by quenching or cooling with （）.Adeprival of oxygenBa water sprayCsoda-acidDfoam
单选题Triethylene glycol fires may be extinguished by（）.Adry chemicalBalcohol foamCcarbon dioxideDAll of the above
单选题Class C fires are best extinguished by （）.Afoam extinguishersBwater spray equipmentCdry powder extinguishersDsoda-acid extinguishers
单选题Oil fires are best extinguished by （）.Acutting off the supply of oxygenBremoving the fuelCspraying with waterDadding oxygen
单选题Class B fires are best extinguished by smothering, i-e（）.Adeprival of oxygenBremoval of heatCspraying of waterDinjecting of soda-acid
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 emergency signal for fires is sounded on the ship’s whistle and general alarm as（）.Aa continuous ringing for 10 secondsBone short ring followed by one long ringCtwo long rings of at least 20 secondsDa continuous ringing until the fire is extinguished
单选题Fire in an engine compartment is best extinguished with carbon dioxide gas (CO2) and by（）.Acompletely closing the compartmentBclosing the compartment except for the ventilatorsCleaving the compartment open to the airDincreasing the air flow to the compartment by blowers
单选题As for an oil-fired boiler if at a normal steaming condition and water goes out of sight in gauge glasses the action you should take is: （） (1) secure oil to fires (2) increase feed pump pressureA（1）B（1）and（2）C（2）Dneither（1）nor（2）