网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
Triethylene glycol fires may be extinguished by（）.
A
dry chemical
B
alcohol foam
C
carbon dioxide
D
All of the above
参考答案
参考解析
解析：
暂无解析
更多 “单选题Triethylene glycol fires may be extinguished by（）.A dry chemicalB alcohol foamC carbon dioxideD All of the above” 相关考题
考题
Oil fires are best extinguished by ______.A.cutting off the supply of oxygenB.removing the fuelC.cooling below the ignition temperatureD.spraying with water
考题
The emergency signal for fires is sounded on the ship’s whistle and general alarm as _____.A.a continuous ringing for 10 secondsB.one short ring followed by one long ringC.two long rings of at least 20 secondsD.a continuous ringing until the fire is extinguished
考题
The Smokey Bear(护林熊) fire prevention program has resulted in a savings of $20 billion on all federal(联邦的), state and private forested land(私有林地). In 1941, 208,000 forest fires burned 30 million acres, while in 1981, fewer than 165,000 fires burned about three million acres. While forest usage has increased, the proportion(比例) of human-caused fires has remained stable; people still cause nine out of ten forest fires. But the biggest cause of fires is arson(纵火), accounting for(引起) 34 percent of forest fires in 1981.1. According to the passage, use of forested land has ____.A、stabilizedB、been privatizedC、decreasedD、risen2. According to the passage, in 1941 forest fires burned ____.A、less acres than in 1981B、3 million acresC、ten times as many acres as in 1981D、20 million acres more than in 19813. According to the passage, the number of human-caused fires ____.A、has remained the same proportionatelyB、has increasedC、is the same as the arson casesD、accounts for 34 per cent of forest fires4. According to the passage, which of the following statements is true?A、Nine out of ten fires are caused by arsonists.B、The Smokey Bear program has saved the nation a lot of money.C、There are more forest fires now than before.D、People do not use the forests as much as they did in the past.5. It may be inferred from the passage that ____.A、the majority of fires are caused by humansB、arson is increasing every yearC、more acres are destroyed by fire each yearD、fewer people are using the forests
考题
After a fire has been extinguished in a closed space, personnel may safely enter the space whenA.smoke density has been decreased sufficiently to see the bulkhead opposite the compartment's entranceB.a lifeline and explosion proof flash light are usedC.all smoke and toxic fumes are removed and an adequate oxygen supply is presentD.overhaul has been completed to remove any possible source of re-ignition
考题
What is classified as a combustible liquid ________．A.AcetaldehydeB.Ethyl alcoholC.Carbon tetrachlorideD.Tetramethylene glycol
考题
A galley grease fire on the stove may be extinguished using______．A.waterB.foamC.the range hood extinguishing systemD.fire dampers
考题
共用题干
Underground Coal FiresCoal burning deep underground in China,India and Indonesia is threatening the environment and human life , scientists have warned.These large-scale______(51)blazes（火焰）cause the ground temperature to heat up and kill surrounding vegetation,produce greenhouse gases and can______(52) ignite（点燃）forest fires , a group of scientists told the annual meeting of the American Association for theAdvancement of Science in Denver.The resulting______(53)of poisonous elements like mercury can also pollute local water sources and soils,they warned."Coal fires are a global disaster,"said Associate Professor Glenn Stracher of East Georgia College inSwainsboro,USA.But______(54)few people know about them.Coal can heat up on its own,and eventually catch fire and bum,if there is a continuous oxygen supply.The heat produced is not caused to______(55)and under the right combinations of sunlight and oxygen,can trigger spontaneous（自发的）catching fire and buming.This can occur underground , in coal stockpiles, abandoned mines or even as coal is transported.______(56)fires in China consume up to 200 million tons of coal per year,delegates were told.In______(57),the U.S.economy consumes about one billion tons of coal annually,said Stracher,______(58)analysis of the likely impact of coal fires has been accepted for publication in the International Journal of Coal Ecology.______(59)underway,coal fires can bum for decades,even centuries.In the process,they release large______(60)of greenhouse gases,poisonous fumes and black particles into the atmosphere.The members of the panel discussed the______(61)these fires may be having on global and regional climate change,and agreed that the underground nature of the fires makes them difficult to______(62).Ultimately,the remote sensing and other techniques should allow scientists to______(63)how much carbon dioxide these fires are emitting（释放）.One suggested______(64)of containing the fires was presented by Gary Colaizzi,of the engineering firm Goodson,which has developed a heat-resistant grout（灌浆）,which is designed to be pumped into the coal fire to______(65)the oxygen supply._________59A:Yet B:Unless C:Once D:Although
考题
共用题干
Underground Coal FiresCoal burning deep underground in China,India and Indonesia is threatening the environment and human life , scientists have warned.These large-scale______(51)blazes（火焰）cause the ground temperature to heat up and kill surrounding vegetation,produce greenhouse gases and can______(52) ignite（点燃）forest fires , a group of scientists told the annual meeting of the American Association for theAdvancement of Science in Denver.The resulting______(53)of poisonous elements like mercury can also pollute local water sources and soils,they warned."Coal fires are a global disaster,"said Associate Professor Glenn Stracher of East Georgia College inSwainsboro,USA.But______(54)few people know about them.Coal can heat up on its own,and eventually catch fire and bum,if there is a continuous oxygen supply.The heat produced is not caused to______(55)and under the right combinations of sunlight and oxygen,can trigger spontaneous（自发的）catching fire and buming.This can occur underground , in coal stockpiles, abandoned mines or even as coal is transported.______(56)fires in China consume up to 200 million tons of coal per year,delegates were told.In______(57),the U.S.economy consumes about one billion tons of coal annually,said Stracher,______(58)analysis of the likely impact of coal fires has been accepted for publication in the International Journal of Coal Ecology.______(59)underway,coal fires can bum for decades,even centuries.In the process,they release large______(60)of greenhouse gases,poisonous fumes and black particles into the atmosphere.The members of the panel discussed the______(61)these fires may be having on global and regional climate change,and agreed that the underground nature of the fires makes them difficult to______(62).Ultimately,the remote sensing and other techniques should allow scientists to______(63)how much carbon dioxide these fires are emitting（释放）.One suggested______(64)of containing the fires was presented by Gary Colaizzi,of the engineering firm Goodson,which has developed a heat-resistant grout（灌浆）,which is designed to be pumped into the coal fire to______(65)the oxygen supply._________52A:only B:justC:even D:then
考题
单选题Halon fire extinguishers are NOT effective when used on which types of fires?（）A
Fires in electrical equipmentB
Flammable oils and greasesC
Class A fires in ordinary combustiblesD
Materials containing their own oxygen
考题
单选题Flames from small leaks of LFG may be extinguished by（）.A
utilizing carbon dioxide or dry chemical fire extinguishersB
utilizing soda and acid fire extinguishersC
blowing the flames outD
letting it burn itself out
考题
单选题Which of the following is true according to the passage?A
Not all the fires in the forests must be put out.B
People‘s carelessness leads to dangerous fires.C
Australia allows all the fires to burn naturally.D
There are more fires in Russia than in the USA.
考题
单选题What is meant by the term overhaul in firefighting?（）A
Slow down the spread of fire by cooling adjacent structuresB
Cover the fire with foamC
Smother the fire with a blanket or similar objectD
Break up solid objects to ensure that any deep seated fires are extinguished
考题
单选题A galley grease fire on the stove may be extinguished using（）.A
waterB
foamC
the range hood extinguishing systemD
fire dampers
考题
单选题Aqueous Film Forming Foam (AFFF), commonly known as ‘light water’, is especially suitable for fighting （）A
oil fires in the engine room bilgesB
class B fires in paint lockersC
any class D fireD
all of the above
考题
单选题Fires involving combustible metals are classified as （）.A
class A firesB
class B firesC
class C firesD
class D fires
考题
单选题After a fire has been extinguished in a closed space, personnel may safely enter the space when （）.A
smoke density has been decreased sufficiently to see the bulkhead opposite the compartments entranceB
a lifeline and explosion proof flash light are usedC
all smoke and toxic fumes are removed and an adequate oxygen supply is presentD
overhaul has been completed to remove any possible source of re-ignition
考题
单选题Class A fires are best extinguished by quenching or cooling with （）.A
deprival of oxygenB
a water sprayC
soda-acidD
foam
考题
单选题Oil fires are best extinguished by（）.A
cutting off the supply of oxygenB
removing the fuelC
cooling below the ignition temperatureD
spraying with water
考题
单选题Class C fires are best extinguished by （）.A
foam extinguishersB
water spray equipmentC
dry powder extinguishersD
soda-acid extinguishers
考题
单选题Oil fires are best extinguished by （）.A
cutting off the supply of oxygenB
removing the fuelC
spraying with waterD
adding oxygen
考题
单选题Class B fires are best extinguished by smothering, i-e（）.A
deprival of oxygenB
removal of heatC
spraying of waterD
injecting of soda-acid
考题
单选题The emergency signal for fires is sounded on the ship’s whistle and general alarm as（）.A
a continuous ringing for 10 secondsB
one short ring followed by one long ringC
two long rings of at least 20 secondsD
a continuous ringing until the fire is extinguished
考题
单选题A fire can be extinguished by removing （）.A
the heatB
the fuelC
the oxygenD
any of the above
考题
单选题A fire in electrical equipment should be extinguished by using（）.A
salt waterB
foamC
low-velocity fogD
CO2
考题
单选题Due to the hazards involved with Halon extinguishers on a ship，the size II extinguisher may only be used（）.A
outsideB
on class C firesC
in an emergencyD
on class B fires
考题
单选题Why did Russia have so many fires in one month in 2010?A
Because lightening spread the fire.B
Because there was much fuel for fires.C
Because there were not enough firefighters.D
Because it was unusually hot, dry and windy.
热门标签
最新试卷
