California Cosmetology Written ExamSafety and Infection ControlEasy
A newly hired employee at a salon repeatedly performs the same hand and wrist motions while filing nails for eight hours a day. To reduce her risk of developing a repetitive strain injury such as carpal tunnel syndrome, she should primarily focus on which practice?
- AIncreasing the contact time of her disinfectant solution
- BUsing proper body mechanics, posture, and adjustable workstation height
- CSwitching to single-use emery boards for every client
- DWearing a dust mask during all services
Show answer & explanationAnswer & explanation
Correct answer: B. Using proper body mechanics, posture, and adjustable workstation height
Ergonomics — proper posture, body mechanics, and adjustable seating/workstation height — reduces strain on joints and muscles during repetitive tasks, lowering the risk of musculoskeletal injuries like carpal tunnel syndrome.
Why the other options are wrong
- A. Disinfectant contact time relates to infection control, not musculoskeletal injury.
- C. Single-use files prevent cross-contamination, not physical strain.
- D. A dust mask protects the respiratory system, not the wrists or joints.
Ergonomics
The practice of designing work tasks, tools, and posture to reduce physical strain and prevent injury during repetitive movements.
- Prevents repetitive strain injuries (e.g., carpal tunnel)
- Involves posture, seating, and workstation height
- Applies to long periods of manicuring, cutting, or standing
Memory trick: Bend the chair, not your back.