When should you use a chemical fume hood in lab?
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When should you use a chemical fume hood in lab?
Laboratory Fume Hoods. A properly operating and correctly used fume hood can reduce or eliminate exposure to volatile liquids, dusts, and mists. It is advisable to use a laboratory hood when working with all hazardous substances.
What is a fume hood intended to be used as?
Laboratory fume hoods are designed for the protection of personnel by preventing contaminants such as vapors, dusts, mists, and fumes from being released into the laboratory and building environment. Fume hoods also provide a physical barrier from chemicals and their reactions.
What kinds of lab activities would require a fume hood?
A fume hood should be used in the following situations: • When working with chemicals with significant inhalation hazards • When carrying out procedures that could explode or generate high pressure • When chemical vapors generated could cause a fire hazard if allowed to accumulate • When working with chemicals that …
What is the purpose of a chemical fume hood quizlet?
A fume hood is used to regulate fumes that could be dangerous out the room.
What is the best way to use fume hood?
The sash should be closed when you are not working in the hood. Keep your face outside of the fume hood. Unless you’re using a walk-in fume hood, your hands should be the only part of your body inside of the hood. The sash acts as a barrier and is there for protection while completing hazardous work.
How should a fume hood be left when not in use?
5. Keep the sash in closed position when running an unattended experiment or when the fume hood is not in use. If not in use, the fume hood must remain “ON” if chemicals are inside to continually eliminate contaminated air in the laboratory.
How do chemical fume hoods work?
A fume hood is a ventilated enclosure in which gases, vapors and fumes are contained. An exhaust fan situated on the top of the laboratory building pulls air and airborne contaminants through connected ductwork and exhausts them to the atmosphere. The slots and baffles direct the air being exhausted.
Which of the following should be checked prior to using a fume hood?
Check to make sure the exhaust fan is working prior to operating the fume hood. This includes checking the baffles, which are the movable partitions that create openings in the back of the hood and keep airflow uniform.
Which is the best use for a fume hood quizlet?
What is the primary function of a fume hood sash?
The sash works as a blast shield to provide protection and containment in the event of a fire. In the case of an explosion, sashes are designed to “spiderweb” instead of shattering, keeping those in the area safe from glass and chemicals.
How to use fume hood?
Place chemicals at least six inches inside the hood. In the case of an emergency,you’ll need to be able to close the sash quickly.
What is portable fume hood?
Portable Hood. With LOC’s Portable Fume Hood, remote control valves have forged brass valve bodies for strength and durability. Valves for gas, air, vacuum and special gases are of needle type design with a stainless steel floating cone and replaceable seat.
How does a fume hood work?
How a Fume Hood Works. A fume hood is a ventilated enclosure in which gases, vapors and fumes are contained. An exhaust fan situated on the top of the laboratory building pulls air and airborne contaminants through connected ductwork and exhausts them to the atmosphere.
What is a chemical fume hood?
Fume Hood. A fume hood, technically a laboratory chemical hood, is a type of local exhaust ventilation system (engineering control). A typical fume hood is cabinet with a moveable front sash (window) made out of safety glass.