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 fire of escaping liquefied flammable gas is best extinguished by ______.
A.cooling the gas below the ignition point
B.cutting off the supply of oxygen
C.stopping the flow of gas
D.interrupting the chain reaction
相关考题：
Any open flame can’t exist in this business buildingA.Yes. We’ve removed all the flammable gas.B.Yes. We’ve searched everywhere for flammable liquidC.Yes. All the flammable liquid and gas have been removed already.D.Yes. We’ve removed all the liquid, gas and wood which can be burned
An inert gas system on a tanker should be used to ______.A.prevent the generation of flammable or combustible gas in tanksB.blow out cargo lines to prevent the build up of gas concentrationsC.dilute tank atmospheres to keep gas concentrations below the lower explosive limitD.prevent fires in the pumproom by continually displacing flammable vapors
How does an inert gas system on a tanker function to prevent explosions in cargo tanks?A.De-energizes the "charged mist" effectB.Maintains a positive pressure on the vent header to cool the flammable vaporsC.Inert gas filters out the flammable vapors from the cargo tank spacesD.Inert gas dilutes the flammable vapor and air concentrations to keep them below the lower explosive limit
If you have a liquefied flammable gas barge in tow，which is NOT required of you with respect to the barge and its cargo ________．A.Make periodic inspections of bilgesB.Keep the barge under constant surveillanceC.Have a properly certificated tankerman or at least one licensed officer on board the towing vesselD.Verify ullage readings
The primary hazard of liquefied petroleum gas and liquefied natural gas is ______．A.PressureB.ToxicityC.TemperatureD.Flammability
You are testing a tank that contained gasoline by using a combustible gas indicator．Under testing，the tank sample caused the needle to move rapidly to 100 on the dial then fall to zero．What is the concentration of flammable gas ________．A.Less than the flammable rangeB.Within the flammable rangeC.Over the flammable rangeD.The explosimeter is defective and giving a false reading
The engine in a covered lifeboat is fueled with ______．A.KeroseneB.Unleaded gasolineC.Diesel oilD.Liquefied gas
A galley grease fire on the stove may be extinguished using______．A.waterB.foamC.the range hood extinguishing systemD.fire dampers
Generally, the first action in extinguishing an LFG fire caused by escaping gas is to ______.A.sweep flames away with water sprayB.shut off the leakC.use a chemical foam fire extinguisherD.call the local fire department
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The weight of liquefied petroleum gas vapors as compared to air is（）.AvariableBthe sameClighterDheavier
单选题If you have a liquefied flammable gas barge in tow，which is NOT required of you with respect to the barge and its cargo? （）AMake periodic inspections of bilgesBKeep the barge under constant surveillanceCHave a properly certificated tankerman or at least one licensed officer on board the towing vesselDVerify ullage readings
单选题Generally, the first action in extinguishing an LFG fire caused by escaping gas is to（）.Asweep flames away with water sprayBshut off the leakCuse a chemical foam fire extinguisherDcall t e local fire department
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Fires in escaping flammable gas are quickly brought under control by（）Astopping the flow of gasBreducing the chemical chain reactionCincreasing the oxygen supplyDcooling below the autoignition point
单选题The purpose of the deck seal in an inert gas system is to prevent（）.Aflammable vapors from entering machinery spaceBflue gas escaping to atmosphereCinert gas escaping to atmosphereDair entering inert gas system
单选题The primary hazard of liquefied petroleum gas and liquefied natural gas is（）.ApressureBtoxicityCtemperatureDflammability
单选题An inert gas system on a tanker should be used to（）.Aprevent the generation of flammable or combustible gas in tanksBblow out cargo lines to prevent the build up of gas concentrationsCdilute tank atmospheres to keep gas concentrations below the lower explosive limitDprevent fires in the pumproom by continually displacing flammable vapors
单选题An inert gas system on a tanker should be used to（）.Aprevent the generation of flammable or combustible gas in tanksBblow out cargo lines to prevent gas concentrationsCdilute tank atmospheres to keep gas concentrations below the lower explosive limitDprevent fires in the pumproom by continually displacing flammable vapors
单选题Generally，the first action in extinguishing an LFG fire caused by escaping gas is to（）.Asweep flames away with water sprayBshut off the leakCuse a chemical foam fire extinguisherDcall the local fire department
单选题When fighting fires in spaces containing bottles of LPG (liquefied petroleum gas)，you should （）.Aattempt to isolate the fire from the LPGBcool the bottles or remove them from the fire areaCsee that the valves on all LPG bottles are closedDplace insulating material over the bottles