A chemical fume hood is a primary engineering control. Which of the following describes how it works with the building exhaust system?: A. All air in the fume hood is exhausted outside of the building B. All air in the fume hood is filtered and recycled back into the lab C. All air in the fume hood is filtered and recycled back into the building air supply D. None of the above
Question
A chemical fume hood is a primary engineering control. Which of the following describes how it works with the building exhaust system?: A. All air in the fume hood is exhausted outside of the building B. All air in the fume hood is filtered and recycled back into the lab C. All air in the fume hood is filtered and recycled back into the building air supply D. None of the above
Solution
The correct answer is A. All air in the fume hood is exhausted outside of the building.
Here's a step-by-step explanation:
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A chemical fume hood is a device used in laboratories to limit exposure to hazardous fumes. The unfiltered air from the fume hood is not safe to breathe, so it must be removed from the building.
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When a fume hood is in operation, air is drawn into the hood and then expelled through ductwork to the outside of the building. This process is known as exhaust.
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The building's exhaust system is responsible for removing the air from the fume hood and expelling it outside. This is why all air in the fume hood is exhausted outside of the building.
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The other options (B and C) involve filtering and recycling the air back into the lab or the building air supply. This is not typically done with a chemical fume hood because the air may contain hazardous substances.
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Therefore, the correct answer to the question is A. All air in the fume hood is exhausted outside of the building.
Similar Questions
Which of the following should you not do when working in a fume hood?: A. Place the chemicals 6 inches from the front opening B. Make sweeping motions with your arms C. Put your head inside the hood D. Keep traffic near the fume hood to a minimum E. B and C
After finishing working in a fume hood, which of the following should you do?: A. Store the chemical containers in the fume hood B. Return the chemical containers to the designated storage locations C. Allow chemical waste to evaporate in the hood
Which of the following types of protection does a fume hood provide?: A. Product B. Environment C. Personnel D. Product, Environmental and Personnel
When the fume hood sash is opened up all the way, which of the following best describes what will happen?: A. Vapors will be contained within the hood B. Proper airflow will be maintained to ensure a fume hood's protective function C. The hood face velocity will slow down potentially allowing vapors to spill into the room air D. Airflow will stop
Before using a fume hood you need to be sure the certification sticker is signed by your laboratory supervisor: A. True B. False
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