To prevent the spread of fire by conduction, you should ______.A.cool the bulkheads around the fireB.remove combustibles from direct exposureC.close all openings to the areaD.shut off all electric power
To prevent the spread of fire by conduction, you should ______.
A.cool the bulkheads around the fire
B.remove combustibles from direct exposure
C.close all openings to the area
D.shut off all electric power
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单选题Which firefighting method is an example of an indirect attack on a fire?().ABouncing a straight stream of water off the overhead to create spray effectBSpraying foam on a bulkhead and letting it flow down and over a pool of burning oilCFlooding a paint locker with CO2 and sealing the compartmentDCooling adjacent bulkheads with water to prevent the spread of the fire by conduction
单选题Before attempting to put out a class “C” fire involving an electric-driven centrifugal pump, you should FIRST ().Ainsulate your shoesBground the fire hoseCsecure its power supplyDstart the fire pump
单选题Ventilation systems connected to a compartment in which a fire is burning are normally closed to prevent the rapid spread of the fire by().AconvectionBconductionCradiationDspontaneous combustion
单选题To extinguish an electrical fire, you should use ().Amechanical foamBchemical foamCcarbon dioxideDsoda acid
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单选题Damaged bulkheads often take a permanent set which is independent of the panting or bulge caused by water pressure. To control this,you should().Ainstall shoring so the shoring supports the damaged bulkheads without pushing on themBinstall shoring so that it pushes on the damaged bulkhead while supporting itCuse jacks or chain falls to remove the set before installing shoresDplace sandbags by the bulkhead without installing shores
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单选题When fighting an electrical fire, you should first ().Astop ventilation to the areaBstop the vesselCsecure electricity to the circuitDapply CO2 to the fire
单选题To prevent the spread of fire by convection you should ().Aremove combustibiles from direct exposureBcool the bulkhead around the fireCclose all openings to the areaDshut off electrical power
单选题To prevent the spread of fire by conduction you should().Acool the bulkheads around the fireBremove combustibles from direct exposureCclose all openings to the areaDshut off all electric power
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