Journeyman Plumber ExamTools, Equipment, and SafetyMedium
A journeyman plumber is using a power threading machine to prepare steel pipe. Which of the following safety practices is most crucial to prevent injury during this operation?
- AWearing a hard hat to protect against falling objects.
- BEnsuring the pipe is securely clamped to prevent rotation.
- CApplying thread sealant before cutting the threads.
- DUsing a pipe cutter instead of a hacksaw for initial cuts.
Show answer & explanationAnswer & explanation
Correct answer: B. Ensuring the pipe is securely clamped to prevent rotation.
When using a power threading machine, the pipe must be held absolutely rigid. If the pipe is not securely clamped, it can spin violently, causing severe injury to the operator or bystanders, or damaging the machine itself. This is a primary safety concern with threading machines.
Why the other options are wrong
- A. While a hard hat is important general PPE, it doesn't address the specific hazard of a pipe threading machine.
- C. Thread sealant is applied after the threading process to ensure a leak-proof connection, not before or during the threading operation for safety.
- D. Using a pipe cutter provides a cleaner cut, but it is not the most crucial safety practice related to the threading operation itself.
Power Threading Machine Safety
Safe operating procedures for machines that cut threads onto pipes, emphasizing prevention of rotational hazards.
- Secure pipe clamping is critical
- Wear appropriate eye protection
- Keep hands clear of rotating parts
- Ensure machine is properly grounded
Memory trick: Clamp it tight, or it's a fright!