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Foam extinguishes a fire by ______.
A.shutting off the air supply
B.cooling the fuel to below ignition temperature
C.dispersing the fuel
D.removing the source of ignition
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更多 “ Foam extinguishes a fire by ______.A.shutting off the air supplyB.cooling the fuel to below ignition temperatureC.dispersing the fuelD.removing the source of ignition ” 相关考题
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CO2 extinguishes a fire byA.a blanket of bubbles formed on theB.smotheringC.coolingD.isolating the heat from the fuel
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In fighting a fire in a fuel tank, the FIRST action you should attempt is to _____.A.secure all sources of fresh air to the tankB.begin transferring the fuel to other tanksC.top off the tank to force out all vaporsD.station someone at the fixed CO2 release controls
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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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How does foam extinguish an oil fire ?______.A.By cooling the oil below the ignition temperatureB.By removing the fuel souce from the fireC.By excluding the oxygen from the fireD.By increasing the weight of the oil
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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
smother the fire with rags
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单选题A fuel line breaks, sprays fuel on the hot exhaust manifold, and catches fire. Your first action should be to（）.A
Batten down the engine roomB
start the fire pumpC
apply carbon dioxide to the fireD
shut off the fuel supply
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单选题If a scavenge fire starts, the engine must be put to “（）” and the fuel must be taken off the cylinders affected by the fire.A
stop engineB
finished with engineC
dead slow aheadD
dead slow astern
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单选题If there’s a fire aboard your vessel, you should first（）.A
notify the competent authoritiesB
sound the alarmC
have passengers put on life preserversD
cut off air supply to the fire
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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You are transferring fuel from the storage tanks to the day tanks by means of an electric fuel oil transfer pumpIf the pump motor catches fire, you would FIRST （）.A
secure the fuel manifoldB
shut off power to the pumpC
shut off the power ventilationD
spray water on the fire
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单选题Foam extinguishes a fire by（）.A
smothering the burning materialB
chemical combination with burning materialC
absorbing the burning materialD
organic destruction of the burning material
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单选题Which of the following statements regarding low expansion foam and its application is INCORRECT?（）.A
Foam should not be used on electrical firesB
One kilo of low expansion foam solution produces much more foamC
Foam is only efficient when it covers the top of burning combustiblesD
A stream of foam should be deflected off the deck in order to best agitate the fire
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单选题If a fire occurs in the boiler room because of a leaking fuel line to a burner, you shut off the fuel using the（）A
burner valveB
root valveC
quick closing valveD
oil return valve
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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When possible，what is the FIRST step in fighting an engine fuel-pump fire which results from a broken fuel line?（）A
Secure all engine room doors，hatches，and ventsB
Close the fuel line valveC
Check the spread of the fire with foamD
Cast the barge off the wharf
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单选题Halon extinguishes a fire by（）.A
breaking the chain reactionB
smothering the fireC
cooling the fireD
coating the fuel with a nonflammable surface
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单选题Foam extinguishes a fire by（）.A
shutting off the air supplyB
cooling the fuel to below ignition temperatureC
dispersing the fuelD
removing the source of ignition
考题
单选题In fighting a fire in a fuel tank, the FIRST action you should attempt is to （）.A
secure all sources of fresh air to the tankB
begin transferring the fuel to other tanksC
top off the tank to force out all vaporsD
station someone at the fixed CO2 release controls
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单选题When an engine is starting and has got a sufficiently high speed, say about 20 rpm,（）A
the starting air supply is cut off and fuel is injected into the cylindersB
the fuel feeding is cut off and the turning gear is put inC
the starting air supply is cut off and turning gear is taken outD
the electric blower is shut down and fuel is injected into the cylinders
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单选题Foam extinguishes a fire mainly by（）.A
coolingB
chemical actionC
smotheringD
inerting the air
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单选题When possible，what should be the FIRST step in combating a fire on deck resulting from a cargo overflow or a leaking cargo line?（）A
Blanket the cargo spill with foamB
Prevent the spread of fire with a foam damC
Apply CO2 on burning fuel at its sourceD
Shut off the transfer of cargo
考题
单选题When occurring a fire in the scavenge air box, the following measures should be taken except for（）A
reducing speed to SLOW and asking bridge for permission to stopB
stopping the fuel oil supplyC
switching-on the auxiliary blowersD
putting the scavenge air box fire extinguishing equipment into function
考题
单选题The vapors given off by heated fuel oil are heavier than air and are（）.A
odorlessB
explosiveC
nontoxicD
visible
考题
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
考题
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
考题
单选题Foam extinguishes a fire by（）.A
shutting off the air supplyB
cooling the fule to below ignition temperatureC
dispersing the fuelD
removing the source of ignition
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