Florida Cosmetology Licensing ExamSafety, Sanitation, and SterilizationHard
A cosmetologist is mixing a chemical solution for a hair treatment. The product's Safety Data Sheet (SDS) indicates that the chemical is a strong irritant and requires enhanced ventilation. What type of ventilation system is specifically designed to remove hazardous fumes and vapors at the source?
- AGeneral room ventilation system
- BRecirculating air purification system
- CCeiling fan
- DLocal Exhaust Ventilation (LEV) system
Show answer & explanationAnswer & explanation
Correct answer: D. Local Exhaust Ventilation (LEV) system
Local Exhaust Ventilation (LEV) systems are specifically designed to capture and remove airborne contaminants, such as hazardous fumes and vapors, at or near their source before they can spread throughout the salon, thus protecting both the cosmetologist and the client.
Why the other options are wrong
- A. General room ventilation dilutes contaminants but does not effectively remove them at the source, allowing them to spread before being exhausted.
- B. Recirculating air purification systems filter air but do not exhaust hazardous fumes from the environment; they merely move them around after filtering, often not removing all chemical vapors.
- C. A ceiling fan circulates air but does not provide effective removal of hazardous fumes and can actually spread them more widely.
Local Exhaust Ventilation (LEV)
An engineering control system designed to capture and remove airborne contaminants, such as chemical fumes and dust, at or near their source to protect workers and clients.
- Removes contaminants at source
- Protects against fumes/vapors
- Crucial for hazardous chemical use
Memory trick: For fumes, LEV is the 'Leading Exhaust Vent' that sets you free.