CSLB C-27 Landscaping ContractorSafetyMedium
A landscaping crew is using a gas-powered hedge trimmer to shape a row of shrubs. The trimmer vibrates significantly during operation. What is the most effective way to mitigate the risk of Hand-Arm Vibration Syndrome (HAVS) for the crew members?
- AProvide anti-vibration handles or tools when possible.
- BRequire operators to take frequent short breaks.
- CImplement job rotation to limit individual exposure time.
- DEnsure all operators wear thick work gloves during use.
Show answer & explanationAnswer & explanation
Correct answer: A. Provide anti-vibration handles or tools when possible.
Providing anti-vibration handles or utilizing tools specifically designed to reduce vibration is the most effective engineering control to mitigate Hand-Arm Vibration Syndrome (HAVS) risks, by addressing the source of the vibration.
Why the other options are wrong
- B. Frequent breaks are an administrative control, similar to job rotation, which reduces exposure but doesn't address the vibration source.
- C. Job rotation is an administrative control that limits exposure but does not eliminate the hazard itself.
- D. Thick gloves offer some comfort but are generally not sufficient to prevent HAVS.
Hand-Arm Vibration Syndrome (HAVS)
A chronic condition caused by prolonged exposure to vibration from hand-held power tools, leading to nerve, blood vessel, and joint damage in the hands and arms.
- Symptoms include numbness, tingling, loss of grip strength, and 'white finger'.
- Risk increases with vibration intensity and exposure duration.
- Prevention focuses on reducing vibration exposure through engineering and administrative controls.
Memory trick: To tame the tremor, engineer the solution first.