OSHA 10-Hour Construction ReviewTools - Hand and PowerMedium
A construction worker is preparing to use a pneumatic impact wrench. Which of the following is an essential safety precaution that must be taken before operating the tool?
- ALubricate the impact wrench with a heavy-duty grease before each use.
- BVerify that all connections are securely fastened and that the hose is free of kinks or damage.
- CEnsure the air compressor is located at least 50 feet away from the work area.
- DAttach a pressure relief valve directly to the tool's air inlet.
Show answer & explanationAnswer & explanation
Correct answer: B. Verify that all connections are securely fastened and that the hose is free of kinks or damage.
Secure connections and an undamaged hose are critical for safe pneumatic tool operation. Loose connections can cause air leaks and whip hazards, while damaged hoses can burst, leading to injuries.
Why the other options are wrong
- A. Pneumatic tools require lubrication, but it's typically done with a few drops of oil into the air inlet, not heavy-duty grease, and not necessarily 'before each use' as a primary safety check.
- C. While compressor placement is important for noise/fumes, a specific distance like 50 feet isn't a universal 'essential' pre-operation step for the tool itself.
- D. Pressure relief valves are typically on the compressor or in the air supply line, not directly attached to the tool's air inlet by the operator as a pre-use step.
Pneumatic Tool Connection Safety
Before operating any pneumatic tool, all air hose connections must be securely fastened, and the hose itself must be inspected for damage to prevent air leaks, hose whipping, and loss of control.
- Secure connections prevent accidental disconnections.
- Undamaged hoses prevent bursts and leaks.
- Hose whipping is a significant hazard.
Memory trick: Hose and connections, check for perfection.