【单选题】【消耗次数:1】
凡是能与空气中的氧起燃烧反应的物质,均称为可燃物。( )
正确
错误
参考答案:
复制
纠错
相关题目
【判断题】 可燃物燃烧消耗氧的过程也是氧化反应放热的过程。
①  正确
②  错误
【判断题】 可燃物是帮助其他物质燃烧的物质。( )
①  正确
②  错误
【单选题】 凡与可燃物质相结合能导致燃烧的物质称为( )。
①  助燃物
②  燃烧产物
③  可燃物
④  氧化物
【判断题】 凡与可燃物质相结合能导致燃烧的物质称为助燃物。( )
①  正确
②  错误
【判断题】 燃烧是可燃物与氧化剂作用发生的放热反应,通常伴有火焰、发光和(或)发烟的现象。( )
①  正确
②  错误
【单选题】 设备、管道物料排空后,加水冲洗再用氮气、空气置换至设备内可燃物含量合格,氧含量在20%--22%。( )
①  正确
②  错误
【单选题】 对于有爆炸危险的可燃物,当可燃物的( ),则越易发生爆炸。
①  爆炸下限越高
②  爆炸极限范围越宽
③  爆炸上限越低?
【判断题】 可燃物、助燃物和点火源是导致燃烧的三要素,缺一不可,是必要条件。
①  正确
②  错误
【单选题】 可燃物质的爆炸下限越小,其爆炸危险性越大,是因为( )。
①  可燃物稍有泄漏就有爆炸危险
②  爆炸极限越宽
③  爆炸上限越高
④  少量空气进入容器就有爆炸危险
【判断题】 当炸药中的氧恰好能完全氧化可燃元素时,称为零氧平衡
①  正确
②  错误
随机题目
【单选题】 There have been few novels by revolutionaries free of those faults____ by Marx and Engels.
①  punished
②  blamed
③  criticized
④  scolded
【单选题】 You’re better ____ from work tomorrow.
①  not be absent
②  not to absent
③  not to be absent
④  not absenting
【单选题】 He considered that the change would be ____ to his health.
①  healthy
②  available
③  profitable
④  beneficial
【单选题】 Mary will not be able to come to the birthday party as she is ____ with a cold.
①  laid out
②  laid up
③  laid by
④  laid down
【单选题】 A ____ language is one which is still spoken by people in the course of their everyday lives.
①  living
②  live
③  lovely
④  alive
【单选题】 The ____ of beer and alcohol in New Zealand is very high.
①  consumption
②  use
③  drink
④  absorption
【单选题】 The woman murdered her friend and ______ to ______.
①  was sentenced , death
②  sentencing , die
③  sentenced , death
④  sentenced , die
【单选题】 _____ that we couldn’ t catch up with him.
①  So fast he ran
②  So fast did he run
③  So fast ran he
④  Such fast did he run
【单选题】 Their happiness was very ____.
①  crisp
②  brittle
③  delicate
④  fragile
【单选题】 I am ____ grateful for the many kindnesses you have shown my son.
①  excessively
②  much
③  certainly
④  exceedingly