Certified Welder Safety and Equipment Setup 2 — Questions and Answers
Question 1: What is the minimum safe distance bystanders should maintain from arc welding operations without proper shielding?
- 5 feet
- 10 feet (Correct answer)
- 15 feet
- 25 feet
Correct answer: 10 feet
Bystanders should stay at least 10 feet from arc welding operations or be protected by appropriate shielding screens.
Question 2: Which type of respirator is required when welding on galvanized steel?
- Dust mask (N95)
- Air-purifying respirator with metal fume filter (Correct answer)
- Supplied-air respirator
- Simple surgical mask
Correct answer: Air-purifying respirator with metal fume filter
Galvanized steel releases zinc oxide fumes when heated, requiring an air-purifying respirator rated for metal fumes.
Question 3: Before setting up an oxy-acetylene welding station, which valve should be opened first?
- Acetylene cylinder valve (Correct answer)
- Oxygen cylinder valve
- Both simultaneously
- Torch needle valve
Correct answer: Acetylene cylinder valve
Acetylene is opened first so that when oxygen is introduced, the mixture can be properly adjusted at the torch.
Question 4: What does a green color on a compressed gas cylinder indicate in the US?
- Acetylene
- Hydrogen
- Oxygen (Correct answer)
- Argon
Correct answer: Oxygen
In the US standard color coding, green cylinders contain oxygen.
Question 5: Which OSHA standard primarily governs welding, cutting, and brazing safety in general industry?
- 29 CFR 1910.252 (Correct answer)
- 29 CFR 1926.350
- 29 CFR 1910.146
- 29 CFR 1926.651
Correct answer: 29 CFR 1910.252
29 CFR 1910.252 covers welding, cutting, and brazing safety requirements for general industry operations.
Question 6: What is the purpose of a weld curtain or welding screen in a shop environment?
- Reduce noise from welding arcs
- Protect nearby workers from arc flash and UV radiation (Correct answer)
- Prevent fumes from spreading to other areas
- Shield equipment from spatter damage
Correct answer: Protect nearby workers from arc flash and UV radiation
Welding curtains are designed to block UV and infrared radiation from the arc to protect surrounding workers.
Question 7: How should compressed gas cylinders be stored when not in use?
- Lying flat to prevent rolling
- Upright and secured with chains or straps (Correct answer)
- Upside down to keep valves clean
- Stacked horizontally in pairs
Correct answer: Upright and secured with chains or straps
Cylinders must be stored upright and secured to prevent tipping, which could damage the valve and cause a hazardous release.
Certified Welder Safety and Equipment Setup 2
What is the minimum safe distance bystanders should maintain from arc welding operations without proper shielding?