OSHA 10-Hour Construction ReviewFocus Four HazardsEasy
A worker is using a pneumatic nail gun on a construction site. What is the most important safety practice to follow when handling this tool, even when not actively nailing?
- APoint the nail gun away from yourself and others.
- BWear impact-resistant gloves to protect hands.
- CAlways keep the air hose disconnected when not in use.
- DEnsure the nail gun is oiled regularly for smooth operation.
Show answer & explanationAnswer & explanation
Correct answer: A. Point the nail gun away from yourself and others.
Even when not actively firing, a pneumatic nail gun can accidentally discharge if the trigger or contact trip is engaged. Therefore, always pointing it away from yourself and others is a fundamental safety practice to prevent 'struck-by' injuries from an unintended nail discharge.
Why the other options are wrong
- B. Gloves are part of PPE, but not the *most important* practice for preventing accidental discharge.
- C. Disconnecting the air hose is good practice for storage or extended breaks, but not always feasible during active work.
- D. Regular oiling is maintenance, not an immediate operational safety practice.
Pneumatic Tool Muzzle Control
When handling pneumatic tools like nail guns, always keep the muzzle (where the projectile exits) pointed away from yourself and others, even when not actively operating the tool, to prevent accidental 'struck-by' injuries.
- Accidental discharge can occur due to faulty mechanisms or inadvertent trigger/contact trip engagement.
- This principle applies to all tools that discharge projectiles (e.g., powder-actuated tools).
- One of the 'Struck-By' hazards.
Memory trick: Point Away, Disconnect Air, Wear Your Gear.