California Cosmetology Written ExamSafety and Infection ControlMedium
A salon owner installs a single ceiling fan intended to circulate general air throughout the shop, but nail technicians at individual workstations still complain of strong chemical odors while filing acrylics and applying monomer. Which type of ventilation improvement would most effectively reduce fume exposure at each technician's workstation?
- APlacing scented candles near each station to neutralize odor
- BOpening the front entrance door periodically
- CLocal exhaust ventilation systems positioned at each workstation
- DA larger ceiling fan to increase overall air circulation speed
Show answer & explanationAnswer & explanation
Correct answer: C. Local exhaust ventilation systems positioned at each workstation
General ventilation like ceiling fans dilutes air throughout the room but does not effectively remove fumes at the source. Local exhaust ventilation captures contaminants directly at each workstation, providing far better protection against chemical exposure.
Why the other options are wrong
- A. Incorrect — scented candles mask odor without removing hazardous chemical vapors.
- B. Incorrect — opening a door is inconsistent and does not target workstation-level exposure.
- D. Incorrect — a bigger fan still only provides general dilution, not source capture.
Local Exhaust vs. General Ventilation
General ventilation dilutes air throughout a room, while local exhaust ventilation captures contaminants directly at the source, such as a nail workstation.
- Local exhaust is more effective for concentrated fume sources
- General ventilation (fans, open windows) only dilutes overall air quality
- Nail and chemical service stations benefit most from source-capture systems
- Proper ventilation reduces headaches, respiratory irritation, and long-term exposure risk
Memory trick: Capture it at the source before it spreads through the whole room.