Pipefitter Safety Procedures and Regulations 5 — Questions and Answers
Question 1: Which OSHA standard specifically governs the control of hazardous energy (lockout/tagout) for pipefitters servicing equipment?
- 29 CFR 1910.146
- 29 CFR 1910.147 (Correct answer)
- 29 CFR 1926.502
- 29 CFR 1910.119
Correct answer: 29 CFR 1910.147
29 CFR 1910.147, the Control of Hazardous Energy standard, establishes lockout/tagout procedures for servicing and maintaining equipment.
Question 2: A pipefitter notices a co-worker's harness has a frayed lanyard after a previous fall arrest. The correct action is to:
- Tape the frayed section and continue use
- Remove it from service immediately and tag it as defective (Correct answer)
- Use it for light-duty work only
- Report it at the end of the shift
Correct answer: Remove it from service immediately and tag it as defective
Any fall protection equipment that has arrested a fall or shows visible damage must be immediately removed from service per OSHA and manufacturer requirements.
Question 3: What is the purpose of a 'buddy system' when a pipefitter performs work in a permit-required confined space?
- To share tools more efficiently
- To ensure an attendant can monitor the entrant and initiate rescue if needed (Correct answer)
- To reduce the number of permits required
- To allow two workers to share a single respirator
Correct answer: To ensure an attendant can monitor the entrant and initiate rescue if needed
An attendant stationed outside the confined space monitors the entrant's condition and can summon rescue without entering the space themselves.
Question 4: Under ASME B31.3, after completing a piping system repair, the line must undergo a pressure test at what minimum percentage above the design pressure?
- 100%
- 110%
- 125% (Correct answer)
- 150%
Correct answer: 125%
ASME B31.3 requires a hydrostatic leak test at 1.5 times (150%) the design pressure, but the standard hydrostatic test is 1.5×; however, the minimum pressure test factor commonly referenced for process piping is 1.5× design pressure.
Question 5: When using a chain hoist to lift a pipe section near electrical lines, the minimum safe approach distance for unqualified workers near 50 kV lines is:
- 3 feet
- 5 feet
- 10 feet (Correct answer)
- 15 feet
Correct answer: 10 feet
OSHA 29 CFR 1926.1408 requires unqualified workers to maintain at least 10 feet of clearance from power lines up to 50 kV.
Question 6: Which color coding is used to identify fire protection piping systems under ANSI/ASME A13.1?
- Yellow with black lettering
- Red (Correct answer)
- Blue
- Green
Correct answer: Red
ANSI/ASME A13.1 designates red as the color for fire protection piping systems.
Question 7: A pipefitter is working with asbestos-containing pipe insulation on a pre-1980 system. The correct respiratory protection under OSHA 29 CFR 1926.1101 for occasional short-duration disturbance is at minimum a:
- N95 filtering facepiece
- Half-face air-purifying respirator with P100 filters (Correct answer)
- Full-face supplied-air respirator
- Dust mask approved by the supervisor
Correct answer: Half-face air-purifying respirator with P100 filters
For asbestos work exceeding the action level, OSHA requires at minimum a half-face air-purifying respirator equipped with HEPA (P100) filters.
Pipefitter Safety Procedures and Regulations 5
Which OSHA standard specifically governs the control of hazardous energy (lockout/tagout) for pipefitters servicing equipment?