【单选题】
易燃和可燃液体的燃烧称为___。
A. 蒸发燃烧
B. 分解燃烧
C. 完全燃烧
D. 扩散燃烧
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答案
A
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【单选题】
分子结构复杂的固体可燃物,受热分解出其组成成份及与加热温度相应的热分解产物,这些分解产物再氧化燃烧,称为___。
A. 蒸发燃烧
B. 分解燃烧
C. 完全燃烧
D. 预混燃烧
【单选题】
某些固体可燃物的蒸气压非常小或者难于发生热分解,当氧气包围物质的表层时,呈炽热状态发生无火焰燃烧,即___。
A. 表面燃烧
B. 放射燃烧
C. 蒸发燃烧
D. 扩散燃烧
【单选题】
天然高分子材料中的木材、棉、麻等物及合成高分子化合物中的热固塑料、合成橡胶、化学纤维等的燃烧,均属___。
A. 蒸发燃烧
B. 预混燃烧
C. 分解燃烧
D. 均相燃烧
【单选题】
阴燃在一定条件下,如果改变通风条件,增加供氧量或可燃物中水分蒸发到一定程度,也可能转变为___。
A. 有焰燃烧
B. 无焰烧烧
C. 自燃
D. 闪燃
【单选题】
在固体可物中,燃点较低、燃烧剧烈的称为___固体。
A. 易燃
B. 难燃
C. 可燃
D. 自燃
【单选题】
下列不是固体物质的燃烧方式是___。
A. 蒸发燃烧
B. 分解燃烧
C. 表面燃烧
D. 自燃
【单选题】
木炭、焦碳以及铁、铜、钨的燃烧均属___。
A. 表面燃烧
B. 蒸发燃烧
C. 分解燃烧
D. 阴燃
【单选题】
在燃烧反应过程中,如果生成的燃烧产物不能再燃烧,称为___。
A. 完全燃烧
B. 不完全燃烧
C. 充分、燃烧
D. 猛烈燃烧
【单选题】
在燃烧反应过程中,如果生成的燃烧产物还可再燃烧,则称为___。
A. 完全燃烧
B. 不完全燃烧
C. 分解燃烧
D. 扩散燃烧
【单选题】
燃烧完全与否不仅与空气供给量有关,而且还与___有关。
A. 其它可燃物扩散混合的均匀程度
B. 燃烧温度
C. 燃烧产物
D. 燃烧阶段
【单选题】
燃烧产物对灭火工作有利的方面是___。
A. 在一定条件下有阻燃作用
B. 引起人员中毒、窒息
C. 影响视线
D. 成为火势发展、蔓延的因素
【单选题】
通过烟的___等特征,消防人员可以大致判断燃烧物质的种类、火灾阶段、火势蔓延方向等。
A. 温度、浓度
B. 颜色变化
C. 扩散范围
D. 气味、颜色、浓度、流动方向
【单选题】
完全燃烧的燃烧产物都是___气体。
A. 可燃
B. 易燃
C. 毒性
D. 不燃、惰性
【单选题】
火焰的颜色与___有关。
A. 温度
B. 空气
C. 环境
D. 湿度
【单选题】
含氧量在___以上的可燃物质燃烧时,发出不显光的火焰。
A. 30%
B. 40%
C. 50%
D. 60%
【单选题】
含碳量在___以上的可燃物,燃烧时产生显光,并带有大量黑烟的火焰。
A. 30%
B. 40%
C. 50%
D. 60%
【单选题】
正在燃烧的可燃气体(蒸气)所占据的发光、放热的空间范围称为___。
A. 焰心
B. 内焰
C. 外焰
D. 火焰
【单选题】
液体可燃物和固体可燃物燃烧时由分解或蒸发出的气体 形成火焰,一般为___。
A. 扩散火焰
B. 预混火焰
C. 分解火焰
D. 蒸发火焰
【单选题】
火焰中由二次空气供氧所形成的火焰峰面称为___。
A. 火焰
B. 焰心
C. 内焰
D. 外焰
【单选题】
有机可燃物火焰的明亮程度和颜色主要由火焰中的___来确定。
A. 含氧量
B. 碳粒子
C. 含氢量
D. 烟浓度
【单选题】
在一定温度下,易燃、可燃液体表面上产生的蒸气,当与空气混合后,一遇着火源,就会发生一闪即灭的燃烧,这种现象叫做___。
A. 闪燃
B. 瞬燃
C. 闪点
D. 爆闪
【单选题】
评价液体火灾危险性的依据是___。
A. 着火点
B. 闪点
C. 燃点
D. 自燃点
【单选题】
易燃与可燃液体表面能够发生闪燃的最低温度称为___。
A. 燃点
B. 闪点
C. 自燃点
D. 爆炸点
【单选题】
根据闪点可将燃烧液体分为两类,闪点大于___℃的称为可燃液体。
A. 30
B. 45
C. 55
D. 70
【单选题】
易燃可燃液体的闪点___,其火灾危险性就越大。
A. 越高
B. 越低
C. 大于45℃
D. 等于45℃
【单选题】
根据___可确定液体生产、加工、储存的火灾危险性分类。
A. 燃点
B. 着火点
C. 闪点
D. 自燃点
【单选题】
闪点小于或等于___的液体称为易燃液体。
A. 35℃
B. 45℃
C. 55℃
D. 70℃
【单选题】
合成橡胶、合成纤维属于___固体。
A. 易燃
B. 难燃
C. 可燃
D. 不燃
【单选题】
汽油的闪燃点为___℃。
A. -30
B. -40
C. -50
D. -60
【单选题】
可燃物质在空气中连续均匀地加热到一定的温度,在没有外部火源的作用下能够发生自动燃烧的现象称为___。
A. 阴燃
B. 受热自燃
C. 本身自燃
D. 着火
【单选题】
可燃物质,在远低于自燃点的温度下自然发热,并且这种热量经长时间的积蓄使物质达到自燃点而燃烧的现象,称为___。
A. 着火
B. 受热自燃
C. 本身自燃
D. 自燃
【单选题】
可燃物质受热发生自燃的最低温度叫___。
A. 燃点
B. 闪点
C. 自燃点
D. 着火点
【单选题】
___是物质从一种状态迅速转变成另一状态,并在瞬间放出大量能量,同时产生声响的现象。
A. 爆炸
B. 闪燃
C. 自燃
D. 着火
【单选题】
按爆炸物质在___中的变化,可分为化学爆炸、物理爆炸和核爆炸。
A. 爆炸条件
B. 爆炸产物
C. 爆炸后果
D. 爆炸过程
【单选题】
按照爆炸的___,化学爆炸可分为爆燃、爆炸、爆震。
A. 过程
B. 产物
C. 条件
D. 传播速度
【单选题】
下列___的爆炸属于物理爆炸。
A. 粉尘
B. 炸药
C. 钢瓶
D. 炸弹
【单选题】
下列___的爆炸属于化学爆炸。
A. 汽油桶
B. 可燃气体
C. 蒸汽锅炉
D. 气体钢瓶
【单选题】
按照爆炸的变化传播速度,___不属于化学爆炸。
A. 爆闪
B. 爆燃
C. 爆炸
D. 爆震
【单选题】
凡在时间或空间上失去控制的燃烧所造成的灾害,称为___。
A. 着火点
B. 火灾
C. 爆炸
D. 燃烧
【单选题】
固体可燃物燃烧而引起的火灾是___。
A. A类火灾
B. B类火灾
C. C类火灾
D. D类火灾
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