OSHA 10-Hour Construction ReviewTools - Hand and PowerEasy
A construction worker is operating a pneumatic nail gun. Which of the following is the most critical safety precaution to take before operating the tool?
- AEnsuring the air compressor is located at least 50 feet away from the work area.
- BWearing a hard hat and safety vest in addition to other required PPE.
- CChecking that the air hose connections are secured with a positive locking device to prevent accidental disconnections.
- DConfirming that the nail gun's magazine is fully loaded with fasteners.
Show answer & explanationAnswer & explanation
Correct answer: C. Checking that the air hose connections are secured with a positive locking device to prevent accidental disconnections.
Securing air hose connections with positive locking devices is crucial to prevent sudden disconnection, which could cause the hose to whip violently and strike workers, leading to serious injury. This direct hazard is more immediate than compressor placement or magazine loading.
Why the other options are wrong
- A. While compressor placement can be a factor for noise or exhaust, it's not the most critical immediate safety precaution for the nail gun's operation itself.
- B. PPE is always required, but checking the tool's integrity and connections addresses a specific and severe pneumatic tool hazard.
- D. Loading fasteners is part of operation, but checking connections for safety is a prerequisite to safe operation, regardless of load.
Pneumatic Tool Hose Safety
Hoses used with pneumatic tools must be securely fastened to prevent accidental disconnection, which can cause severe injury due to whipping.
- Use positive locking devices on all hose connections.
- Inspect hoses for damage before each use.
- Never carry a pneumatic tool by its hose.
Memory trick: Air power needs secure connections, or it'll whip!