Question at position 10 What hazardous situation should be avoided when responding to a chemical spill:Spread chemical spill through contact with yourself in to clean areaTurning Fume Hoods onExtinguish any sources of ignitionAll of the Above

Question

BlackTom AI · Accepted Answer

Avoid spreading contamination, creating air currents that move vapors, or leaving ignition sources — all three are hazards to prevent when responding to a chemical spill, so the correct choice is All of the Above.

Relevant knowledge points:
- Contamination spread: Walking through or contacting a spill transfers chemical to clothing, skin, shoes and carries it into clean areas, increasing exposure and secondary contamination.
- Airflow and ventilation: Changing ventilation (including turning fume hoods or building systems on/off) can create air currents that draw vapors out of the spill area, disperse them across the lab, or pull them into occupied zones, increasing inhalation risk.
- Ignition sources: Many chemicals are flammable or reactive; open flames, hot surfaces, or energized equipment near a spill can ignite vapors or create explosive conditions.

Step-by-step reasoning:
1. Immediately isolate the area and prevent personnel from walking through the spill; this avoids transferring liquid/contaminant to other zones and reduces skin/contact exposures.
2. Do not alter ventilation or the state of fume hoods without trained supervision; turning hoods or building ventilation on/off can unpredictably change airflow patterns and spread hazardous vapors to other occupants or into breathing zones.
3. Remove or extinguish ignition sources as appropriate and safe to do so (e.g., turn off hot plates, extinguish Bunsen burners at a safe distance); eliminating ignition sources prevents fires or explosions if the spilled chemical is flammable.
4. In short, each action or inaction listed represents a potential hazard. Only addressing all three reduces overall risk.

Why “All of the Above” is correct and other options alone are insufficient:
- “Spread chemical spill through contact with yourself into clean area” describes a real hazard to avoid, but preventing only that does not address vapor dispersion or fire risk.
- “Turning Fume Hoods on” can create hazardous airflow; avoiding this alone still leaves contact and ignition risks.
- “Extinguish any sources of ignition” (interpreted as ensuring ignition sources are controlled) is necessary but does not prevent contamination spread or vapor movement.
Combining all three precautions is required, therefore All of the Above is the correct answer. This matches the provided answer: All of the Above.

Question at position 10 What hazardous situation should be avoided when responding to a chemical spill:Spread chemical spill through contact with yourself in to clean areaTurning Fume Hoods onExtinguish any sources of ignitionAll of the Above单项选择题

类似问题

Before cleaning up a minor chemical spill, one must make sure that he/she is familiar with the hazards of the spilled chemical(s) and can do so safely. Is the above statement true or false?

Is the following statement true or false? In the products of methylation-hydrolysis, every -OH group corresponds to the position of a glycosidic bond in the starting polysaccharide.

Which of the follwoing structures represents amylopectin?

Which of the following is true about an aldopentose?I. It is a monosaccharide.II. It contains a CHO groupIII. It is a disaccharide.IV. It is an oligosaccharide.

For stock A, we have 𝛽 𝑖 = 0.70. Suppose the expected market risk premium next year is 9% and the risk-free rate is 3%. What is the expected return of this stock based on the CAPM? (Please answer in % and round to 2 decimal places. If the answer is 8.057%, then in the box, write 8.06)

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单