Pipefitter Safety Procedures and Codes 4 — Questions and Answers
Question 1: When a pipefitter notices a co-worker not using required PPE, what is the correct first action?
- Ignore it and continue working
- Immediately report to OSHA
- Stop work and inform the co-worker and supervisor (Correct answer)
- Document it in the incident log at end of shift
Correct answer: Stop work and inform the co-worker and supervisor
The correct action is to stop work, inform the co-worker of the hazard, and notify the supervisor to ensure compliance and prevent injury.
Question 2: Under OSHA's Process Safety Management (PSM) standard (29 CFR 1910.119), what is the threshold quantity for flammable liquids?
- 500 pounds
- 5,000 pounds
- 10,000 pounds (Correct answer)
- 25,000 pounds
Correct answer: 10,000 pounds
OSHA PSM standard 29 CFR 1910.119 sets the threshold quantity for flammable liquids at 10,000 pounds.
Question 3: What is the maximum safe working load a safety harness must support according to OSHA fall protection standards?
- 2,500 lbs
- 3,000 lbs
- 4,000 lbs
- 5,000 lbs (Correct answer)
Correct answer: 5,000 lbs
OSHA requires anchorage points for personal fall arrest systems to support at least 5,000 pounds per worker attached.
Question 4: In pipefitting, a 'hot work permit' is required before performing which activity?
- Installing threaded pipe fittings
- Welding near flammable materials (Correct answer)
- Hydrostatic testing
- Torquing flange bolts
Correct answer: Welding near flammable materials
A hot work permit is required before welding, cutting, or other spark-producing activities near flammable or combustible materials.
Question 5: Which NFPA code specifically governs the installation of fuel gas piping systems?
- NFPA 13
- NFPA 30
- NFPA 54 (Correct answer)
- NFPA 72
Correct answer: NFPA 54
NFPA 54, the National Fuel Gas Code, governs the installation, maintenance, and operation of fuel gas piping systems.
Question 6: What is the minimum air quality (oxygen level) required before a worker may enter a confined space without supplied air?
- 16.5%
- 18.0%
- 19.5% (Correct answer)
- 21.0%
Correct answer: 19.5%
OSHA requires a minimum oxygen concentration of 19.5% in confined spaces before workers may enter without supplied air.
Question 7: Which type of fire extinguisher should be used on a Class C (energized electrical) fire?
- Water extinguisher
- CO2 extinguisher (Correct answer)
- Class K extinguisher
- Class A dry chemical only
Correct answer: CO2 extinguisher
CO2 extinguishers are appropriate for Class C (electrical) fires because they are non-conductive and leave no residue.
Pipefitter Safety Procedures and Codes 4
When a pipefitter notices a co-worker not using required PPE, what is the correct first action?