Dry powder is used to put out ________A.electrical fireB.oil fireC.common firesD.all kinds of fires

题目

Dry powder is used to put out ________

A.electrical fire

B.oil fire

C.common fires

D.all kinds of fires

相似考题

1.An inert gas system on a tanker should be used to ______.A.prevent the generation of flammable or combustible gas in tanksB.blow out cargo lines to prevent the build up of gas concentrationsC.dilute tank atmospheres to keep gas concentrations below the lower explosive limitD.prevent fires in the pumproom by continually displacing flammable vapors

2.共用题干 The Smog（烟雾）For over a month,lndonesia was in crisis.Forest fires raged out of control as the country suffered its worst drought for 50 years.Smoke from the fires mixed with sunlight and hot dry air to form a cloud of smog.This pollution quickly spread and within days it was hanging over neighbouring countries including Malaysia,Singapore and Thailand.When the smoke combined with pollution from factories and cars,it soon became poisonous（有毒的）.Dangerous amounts of CO became trapped under the smog and pollution levels rose. People wheezed（喘息）and coughed as they left the house and their eyes watered immediately.The smog made it impossible to see across streets and whole cities disappeared as grey soot（烟灰）covered everything. In some areas, water was hosed（用胶管浇）from high-rise city buildings to try and break up the smog.Finally,heavy rains,which came in November,put out the fires and cleared the air. But the environmental costs and health problems will remain.Many people from South-Eastern Asian cities already suffer from breathing huge amounts of car exhaust fumes（汽车排放的废气）and factory pollution. Breathing problems could well increase and many non-sufferers may have difficulties for the first time.Wildlife has suffered too.In lowland forests,elephants,deer,and tigers have been driven out of their homes by smog.But smog is not just an Asian problem.In fact,the word was first used in London in 1905 to describe the mixture of smoke and thick fog.Fog often hung over the capital. Sometimes the smog was so thick and poisonous that people were killed by breathing problems or in accidents.About 4, 000 Londoners died within five days as a result of thick smog in 1952.Water was used to try to break up the smog.A:Right B:Wrong C:Not mentioned

3.Close all fire doors and use the （）（干粉灭火器）.A、dry powder extinguisherB、foam extinguisherC、CO2 extinguisherD、portable extinguisher

4.Foam is a very effective smothering agent and ______.A.it provides cooling as a secondary effectB.works well on extinguishing electrical firesC.can be used to combat combustible metal firesD.All of the above

更多“Dry powder is used to put out ________A.electrical fireB.oil fireC.common firesD.all kinds of fires”相关问题

  • 第1题：

    Water is used to put out （）(普通火).

    • A、common fire
    • B、electric fire
    • C、oil fire
    • D、fire

    正确答案:A

  • 第2题：

    重吊杆用于吊大的重件。（）

    • A、Heavy derrick is used for lifting large heavy cargo.
    • B、Derrick is used for lifting large heavy cargo.
    • C、Heavy derrick is used for lifting dry bulk cargo.
    • D、Derrick is used for lifting dry bulk cargo.

    正确答案:A

  • 第3题：

    A fire extinguisher is used for （）fires.

    • A、stopping
    • B、putting out
    • C、putting
    • D、finishing

    正确答案:B

  • 第4题：

    An electrical fire should be put out by dry powder. （）

    • A、电火应该使用干粉扑灭。
    • B、木火应该用干粉扑灭。
    • C、油火应该用干粉扑灭。
    • D、普通火应该用干粉扑灭。

    正确答案:A

  • 第5题：

    单选题
    What kind of （）can be used for gas and chemical fires?
    A

    equipment

    B

    apparatus

    C

    extinguishers

    D

    machines


    正确答案： A
    解析： 暂无解析

  • 第6题：

    单选题
    What is an advantage of using foam in fire fighting?（）
    A

    It is MOST effective on very hot oil fires where the temperatures of the liquid exceed 100°C (212°F)

    B

    Most foams can be used with dry chemicals to attack a fire by two methods

    C

    Foam is effective on combustible metal fires

    D

    Foam can be made with seawater or fresh water


    正确答案： B
    解析： 暂无解析

  • 第7题：

    单选题
    Halon fire extinguishers are NOT effective when used on which types of fires?（）
    A

    Fires in electrical equipment

    B

    Flammable oils and greases

    C

    Class A fires in ordinary combustibles

    D

    Materials containing their own oxygen


    正确答案： C
    解析： 暂无解析

  • 第8题：

    单选题
    Water can’t be used to put out fires of （）
    A

    Class A

    B

    Class B

    C

    Class C

    D

    B+C


    正确答案： C
    解析： 暂无解析

  • 第9题：

    单选题
    When a repeating timer expires,（）.
    A

    The When-Timer-Expired trigger resets the timer's iteration parameter. 

    B

    The When-Custom-Item-Event trigger fires and executes the desired actions. 

    C

    It is put in a queue of expired timers for processing on a first-in-first-out basis. 

    D

    The When-Timer-Expired trigger fires instantly regardless of any other processing in the form module. 


    正确答案： B
    解析： 暂无解析

  • 第10题：

    单选题
    Recharging a previously used cartridge-operated dry-chemical extinguisher is accomplished by（）.
    A

    authorized fire equipment servicing personnel only

    B

    replacing the propellent cartridge and refilling with powder

    C

    puncturing the cartridge seal after installation

    D

    recharging the cartridge and refilling it with powder


    正确答案： A
    解析： 暂无解析

  • 第11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.


    正确答案： A
    解析：
    【文章大意】本文主要分析了造成现在越来越多的地区发生森林火灾的原因，并强调有控制的森林火是有必要的，有助于促进植被的更新。
    细节推断题。根据文章第二段倒数第三句“In 2010, Russia had the hottest and driest summer in a century”可知，2010年俄罗斯发生多次火灾的原因是天气炎热，气候干燥，故选择D项。

  • 第12题：

    单选题
    An inert gas system on a tanker should be used to（）.
    A

    prevent the generation of flammable or combustible gas in tanks

    B

    blow out cargo lines to prevent gas concentrations

    C

    dilute tank atmospheres to keep gas concentrations below the lower explosive limit

    D

    prevent fires in the pumproom by continually displacing flammable vapors


    正确答案： D
    解析： 暂无解析

  • 第13题：

    Water can put out common fires, such as （）.

    • A、wood，paper
    • B、textile
    • C、A+B
    • D、oil

    正确答案:C

  • 第14题：

    Water is used to put out （）.

    • A、oil fire
    • B、electrical fire
    • C、common fire
    • D、special fire

    正确答案:C

  • 第15题：

    关闭所有防火门并使用干粉灭火器。（）

    • A、Close all fire doors and use the dry powder extinguisher.
    • B、Close all fire doors and use the foam extinguisher.
    • C、Close all fire doors and use the CO2 extinguisher.
    • D、Close all fire rooms and use the dry powder extinguisher.

    正确答案:A

  • 第16题：

    When a repeating timer expires,（）.

    • A、The When-Timer-Expired trigger resets the timer's iteration parameter. 
    • B、The When-Custom-Item-Event trigger fires and executes the desired actions. 
    • C、It is put in a queue of expired timers for processing on a first-in-first-out basis. 
    • D、The When-Timer-Expired trigger fires instantly regardless of any other processing in the form module. 

    正确答案:C

  • 第17题：

    单选题
    Dry chemical extinguishers extinguish class B fires to the greatest extent by（）.
    A

    cooling

    B

    smothering

    C

    oxygen dilution

    D

    breaking the chain reaction


    正确答案： B
    解析： 暂无解析

  • 第18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.


    正确答案： A
    解析：
    分析判断题。本文重点强调森林火灾的好处，一定的火灾是有必要的。A项说不必扑灭所有的森林火灾，符合文章的观点。B选项指出是人们的大意导致了严重的火灾，根据文章第二、三段的首句可知，引起火灾的原因是气候变化和传统消防，排除B项。根据文章第三段第二句“as result, countries like Australia allow more fires to burn naturally”可知，C项错误。D选项文章没有提及，所以排除。故选择A项。

  • 第19题：

    单选题
    Class C fires are best extinguished by （）.
    A

    foam extinguishers

    B

    water spray equipment

    C

    dry powder extinguishers

    D

    soda-acid extinguishers


    正确答案： C
    解析： 暂无解析

  • 第20题：

    单选题
    Water can put out common fires, such as （）.
    A

    wood，paper

    B

    textile

    C

    A+B

    D

    oil


    正确答案： A
    解析： 暂无解析

  • 第21题：

    单选题
    What is the main idea of Paragraph 4?
    A

    Fires are serious threats to human beings.

    B

    Australian firefighters don‘t put out fires.

    C

    Fires can play an important role I forests.

    D

    It‘s difficult for firefighters to control the fires.


    正确答案： A
    解析：
    主旨大意题。通读第四段可知，该段主要讲森林火灾的好处，在不威胁人们生活的条件下，森林火灾可以烧掉森林里的枯枝败叶，让阳光直射大地，促进新的植被的生长。因此，选择C项。

  • 第22题：

    单选题
    An electrical fire should be put out by dry powder. （）
    A

    电火应该使用干粉扑灭。

    B

    木火应该用干粉扑灭。

    C

    油火应该用干粉扑灭。

    D

    普通火应该用干粉扑灭。


    正确答案： C
    解析： 暂无解析

  • 第23题：

    单选题
    An inert gas system on a tanker should be used to（）.
    A

    prevent the generation of flammable or combustible gas in tanks

    B

    blow out cargo lines to prevent the build up of gas concentrations

    C

    dilute tank atmospheres to keep gas concentrations below the lower explosive limit

    D

    prevent fires in the pumproom by continually displacing flammable vapors


    正确答案： C
    解析： 暂无解析

相关内容