题目内容

2011年6月6日，某炼油厂油罐区的2号汽油罐发生火灾爆炸事故，造成1人死亡、3人轻伤，直接经济损失420万元。该油罐为拱顶罐，容量200 m3。油罐进油管从罐顶接入罐内，但未伸到罐底，罐内原有液位计因失灵已拆除。 2011年5月20日，油罐完成了清罐检修。6月6日8时，开始给油罐输油，汽油从罐顶输油时进油管内流速为2.3～2.5m/s，导致汽油在罐内发生了剧烈喷溅，随即着火爆炸。爆炸把整个罐顶抛离油罐。现场人员灭火时发现泡沫发生器不出泡沫，匆忙中用水枪灭火，导致火势扩大。消防队到达后，用泡沫扑灭了火灾。事故发生后，在事故调查分析时发现，泡沫灭火系统正常，泡沫发生器不出泡沫的原因是现场操作人员操作不当，开错了阀门。该厂针对此次事故暴露出的问题，加强了员工安全培训，在现场增设了自动监控系统，完善了现场设备、设施的标志和标识，制定了安全生产应急救援预案。根据以上场景，回答下列问题(1～3题为单选题，4～8题为多选题) 该起火灾爆炸事故的点火源是( )。

A. 明火
B. 静电放电
C. 高温烘烤
D. 油品含有的杂质
E. 接地不良的罐体

查看答案

搜索结果不匹配？点我反馈

更多问题

Which of the following statements regarding the effects of unanticipated inflation on the labor market and the market for financial capital is most accurate （）

A. When the actual rate of inflation is higher than expected, employees receive less compensation for their labor and this represents a gain for employers at the expense of their employees.
B. When the actual rate of inflation is declining, real wage rates of employees are lower than employers expected to pay, and employers gain at the expense of their employees.
C. When there is unanticipated inflation, interest rates are not set high enough to compensate borrowers for the declining value of money so lenders gain at the expense of borrowers.

查看答案

分4组，任选一组作答。每题的备选项中，只有1个最符合题意。矿山安全技术冒顶事故的处理办法中，( )一般采取掏梁窝、探大梁，使用单腿棚或悬挂金属顶梁处理。

A. 局部小冒顶
B. 局部冒顶范围较大的
C. 大冒顶
D. 局部大冒顶

查看答案

What rate of return will an investor earn if they buy a 20-year, 10 percent annual coupon bond for $900 They plan on selling this bond at the end of five years for $951. Calculate the rate of return and the current yield at the end of five years. Rate of return Current yield （）①A. 12.0% 10.51% ②B. 9.4% 11.00% ③C. 12.0% 11.00%

A. ①
B. ②
C. ③

查看答案

An analyst constructs a histogram and frequency polygon of monthly returns for aggressive equity funds over a 20-year period. Which of the following statements about a histogram or a frequency polygon is FALSE（）

A. Both a histogram and a frequency polygon provide a graphical display of data found in a frequency distribution on.
B. A frequency polygon is a bar chart of continuous data that have been grouped into a frequency distribution.
C. The height of each bar in a histogram represents the absolute frequency for each return interval.

查看答案

A. 明火 B. 静电放电 C. 高温烘烤 D. 油品含有的杂质 E. 接地不良的罐体

Which of the following statements regarding the effects of unanticipated inflation on the labor market and the market for financial capital is most accurate （）

分4组，任选一组作答。每题的备选项中，只有1个最符合题意。矿山安全技术 冒顶事故的处理办法中，( )一般采取掏梁窝、探大梁，使用单腿棚或悬挂金属顶梁处理。

An analyst constructs a histogram and frequency polygon of monthly returns for aggressive equity funds over a 20-year period. Which of the following statements about a histogram or a frequency polygon is FALSE（）

A. 明火
B. 静电放电
C. 高温烘烤
D. 油品含有的杂质
E. 接地不良的罐体

分4组，任选一组作答。每题的备选项中，只有1个最符合题意。矿山安全技术冒顶事故的处理办法中，( )一般采取掏梁窝、探大梁，使用单腿棚或悬挂金属顶梁处理。