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The fire extinguishing action of CO 2 comes mostly from ______.
A.breaking the fire chemical chain reaction
B.smothering
C.cooling
D.isolating the heat from the fuel
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更多 “ The fire extinguishing action of CO 2 comes mostly from ______.A.breaking the fire chemical chain reactionB.smotheringC.coolingD.isolating the heat from the fuel ” 相关考题
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A galley grease fire on the stove may be extinguished using______．A.waterB.foamC.the range hood extinguishing systemD.fire dampers
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After extinguishing a fire with CO2, it is advisable to ______.A.use all CO2 available to cool the surrounding areaB.stand by with water or other agentsC.thoroughly ventilate the space of CO2D.jettison all burning materials
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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
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单选题If you are fighting a fire below the main deck of your vessel，which action is most important concerning the stability of the vessel?（）.A
Shutting off electricity to damaged cablesB
Pumping fire-fighting water overboardC
Maneuvering the vessel so the fire is on the lee sideD
Removing burned debris from the cargo hold
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单选题When fighting a spreading fire resulting from a broken fuel line, you should FIRST （）.A
look for a CO2 extinguisherB
use a soda acid extinguisherC
shut off the fuel supplyD
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单选题A class B fire is most successfully fought by（）.A
preventing oxygen from reaching the burning materialB
cooling the burning material below its ignition temperatureC
using the extinguishing agent to make the burning material fire-resistantD
using the extinguishing agent to absorb the heat
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单选题If you are fighting a fire below the main deck of your vessel，which action is most importantconcerning the stability of the vessel? （）A
Shutting off electricity to damaged cablesB
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Maneuvering the vessel so the fire is on the lee sideD
Removing burned debris from the cargo hold
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单选题The basic training in fire prevention and fire fighting should include the theoretical elements which should cover （）.A
the three elements of fire and explosionB
lower and upper flammable limitsC
classification of flies and applicable extinguishing agentsD
All of the above
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单选题The remote control for a fixed fire extinguishing system should be（）.A
painted red and labeledB
concealed from the crewC
protected by plexiglassD
padlocked
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单选题What is an advantage of using foam in fire fighting?（）A
It is effective in controlling fire in flowing oil such as coming from a broken fuel lineB
It absorbs heat from materials that could cause reignitionC
Most foams can be used jointly with dry chemical extinguishing agents to attack a fire by two methods of extinguishmentD
Once the surface is blanketed with foam and the fire is extinguished，no further foam is required
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单选题The FIRST course of action in fighting a fire in a cargo or fuel oil tank is to （）.A
secure all openings to the tankB
discharge an initial charge of CO2 with a hand portable extinguisherC
direct a fire hose into the tank and energize the fire mainD
spray the tank boundaries with a fire hose to promote cooling
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单选题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 t e local fire department
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单选题Water is a very effective fire extinguishing agent because it（）A
will remove all the toxic fumes from the airB
has the greatest cooling abilityC
will leave no harmful residueD
completely removes combustible vapors from the air
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单选题In order to release CO2 to the machinery spaces from a fixed fire extinguishing system, you must（）.A
actuate an alarm and open the engine room control valveB
actuate an alarm and open the engine room CO2 releasing valveC
open the engine room control valve and shut off engine room ventilation fansD
open the engine room control valve and then the CO2 releasing valve
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单选题The best method of extinguishing a class A fire is to（）.A
remove oxygen from the areaB
cool fuel below ignition temperatureC
smother with CO2D
smother fire with foam
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单选题During a fire drill on a ship，what action is required?（）A
Start each fire pumpB
Launch and run a lifeboatC
Inventory rescue and fire equipmentD
Inspect fire hoses
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单选题Which of the fire extinguishing agents listed is the safest to use when combating a class C fire?（）A
CO2B
FoamC
Water fogD
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单选题The fire extinguishing action of CO2 comes mostly from （）.A
breaking the fire chemical chain reactionB
smotheringC
coolingD
isolating the heat from the fuel
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单选题The best method of extinguishing a class A fire is to （）.A
remove oxygen from the areaB
smother fire with foamC
smother fire with CO2D
cool fuel below ignition temperature
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单选题If a small fire initially breaks out in the engine room bilges, in which of the following sequences should the fire extinguishing agents or systems be used?（）A
Fixed CO2,semi-portable CO2, then hand portable CO2B
Semi-portable CO2, fixedCO2, then hand portable CO2C
Hand portable, semi-portable CO2, then as a last resort the fixed CO2 systemD
Hand portable, fixed CO2, then as a last resort the semi-portable CO2
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单选题After extinguishing a paint locker fire using the fixed CO2 system，the next action is to have the space（）.A
opened and burned material removedB
left closed with vents off until all boundaries are coolC
checked for oxygen contentD
doused with water to prevent reflash
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单选题CO2 extinguishes a fire by （）.A
a blanket of bubbles formed on the surface of the fireB
smotheringC
coolingD
isolating the heat from the fuel
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单选题Your vessel is equipped with a fixed CO2 system and a fire main system. In the event of an electrical fire in the engine room what is the correct procedure for fighting the fire?（）A
Use the CO2 system and evacuate the engine roomB
Use the fire main system and evacuate the engine roomC
Evacuate the engine room and use the CO2 systemD
Evacuate the engine room and use the fire main system
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单选题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
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单选题After extinguishing a fire with CO2，it is advisable to（）.A
use all CO2 available to cool the surrounding areaB
stand by with water or other agentsC
thoroughly ventilate the space of CO2D
jettison all burning materials
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单选题After extinguishing a fire with C02,it is availabe to（）.A
use all CO2 available to cool the surronding areaB
stand by with water or other agentsC
thoroughly ventilate the space of CO2D
jettison all buring materials
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