单选题Fire dampers prevent the spread of fire by（）.AconvectionBconductionCradiationDdirect contact
单选题
Fire dampers prevent the spread of fire by（）.
A
convection
B
conduction
C
radiation
D
direct contact
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相关考题：
Fire dampers prevent the fire spreading through the process ofA.convectionB.conductionC.radiationD.direct contact
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
The ventilation system of your ship has fire dampers restrained by fusible links. Which statement is TRUE?A.Fusible links must be replaced if a damper is activatedB.Fusible links are tested by applying a source of heat to themC.Fusible links must be replaced at every inspection for certificationD.A fusible link will automatically open after a fire is extinguished and reset the damper
A galley grease fire on the stove may be extinguished using______．A.waterB.foamC.the range hood extinguishing systemD.fire dampers
Fire may be spread by which means?A.Conduction of heat to adjacent surfacesB.Direct radiationC.ConvectionD.All of the above
单选题The ventilation system of your ship has fire dampers restrained by fusible links. Which statement is TRUE?（）AA fusible link will automatically open after a fire is extinguished and reset the damperBFusible links must be replaced at every inspection for certificationCFusible links are tested by applying a source of heat to themDFusible links must be replaced if a damper is activated
单选题Fire dampers prevent the fire spreading through the process of （）.AconvectionBconductionCradiationDdirect contact
单选题In the event of a fire, the doors to a stair tower must be closed to prevent the spread of fire by （）.AconvectionBconductionCradiationDventilation
单选题Fusible-link fire dampers are operated by（）.Aa break-glass and pull-cable systemBelectrical controls on the bridgeCa mechanical arm outside the vent ductDthe heat of a fire melting the link
单选题Fire may be spread by which means?（）AConduction of heat to adjacent surfacesBDirect radiationCConvectionDAll of the above
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Fusible-link fire dampers are operated by（）.A8the heat of a fire melting the linkBa break-glass and pull-cable systemCelectrical controls on the bridgeDa mechanical arm outside the vent duct
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A galley grease fire on the stove may be extinguished using（）.AwaterBfoamCthe range hood extinguishing systemDfire dampers
单选题A fire may be spread by which of the following means?（）AConduction of heat to adjacent surfacesBDirect radiationCConvectionDAll of the above
单选题A fire must be ventilated（）.Awhen using an indirect attack on the fire such as flooding with waterBto prevent the gases of combustion from surrounding the firefightersCto minimize heat buildup in adjacent compartmentsDif compressed gas cylinders are stowed in the compartment on fire
单选题Automatic fire dampers in ventilation systems are operated by use of（）.Aremotely operated valvesBfusible linksCC02 system pressure switchesDheat or smoke detectors
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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
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单选题The primary function(s) of an automatic sprinkler system is(are) to（）.Aextinguish the fire which triggers itBlimit the spread of fire and control the amount of heat producedCprotect people in the areas which have sprinkler headsDalert the crew to the fire
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单选题Blocking open or removing fire dampers can cause（）.Afixed foam systems to be ineffectiveBfaster cooling of the fireCthe accumulation of explosive gasesDthe fire to spread through the ventilation system
单选题The spread of fire is prevented by（）.Acooling surfaces adjacent to the fireBleaving combustibles in the endangered areaCincreasing the oxygen supplyDAll of the above