AWS AWS Welding Codes & Standards 5 — Questions and Answers
Question 1: AWS D1.5 applies specifically to welding of which type of structure?
- Highway bridges (Correct answer)
- Pressure vessels
- Sheet metal HVAC ductwork
- Offshore platforms
Correct answer: Highway bridges
AWS D1.5 Bridge Welding Code governs the welding of highway bridges in the United States.
Question 2: What is the primary purpose of a Procedure Qualification Record (PQR) under AWS standards?
- To record the actual variables used during test welds and the test results that qualify a WPS (Correct answer)
- To list all welders certified on a project
- To document daily production weld inspection findings
- To specify the filler metals approved for a given base metal group
Correct answer: To record the actual variables used during test welds and the test results that qualify a WPS
A PQR documents the essential variables and test results from a qualification weld, supporting the validity of the corresponding WPS.
Question 3: Under AWS D1.1, which discontinuity type is NEVER permitted regardless of size in a cyclically loaded tension member?
- Cracks (Correct answer)
- Porosity
- Undercut
- Overlap
Correct answer: Cracks
AWS D1.1 has a zero tolerance for cracks in any weld subjected to cyclic tensile loading because they propagate under fatigue.
Question 4: The AWS A5 series of standards primarily covers which category of welding materials?
- Filler metals and consumables (Correct answer)
- Welding procedure qualification
- Inspection and testing methods
- Welder certification requirements
Correct answer: Filler metals and consumables
The AWS A5 series establishes specifications for filler metals including electrodes, rods, and fluxes for all welding processes.
Question 5: Which essential variable change in a WPS always requires requalification under AWS D1.1?
- A change from one P-number base metal group to a different, non-qualified group (Correct answer)
- A change in root opening within the prequalified range
- Increasing interpass temperature above the minimum specified
- Changing from DC+ to DC- polarity for GMAW-S
Correct answer: A change from one P-number base metal group to a different, non-qualified group
Changing base metal P-number groups beyond those qualified by the PQR is an essential variable that mandates requalification.
Question 6: Under ANSI Z49.1, which government agency does AWS coordinate with to establish safety requirements for welding and cutting?
- OSHA (Correct answer)
- EPA
- NIST
- DOT
Correct answer: OSHA
ANSI Z49.1 Safety in Welding, Cutting, and Allied Processes aligns with OSHA regulations for worker protection.
Question 7: When AWS D1.1 refers to a 'complete joint penetration' (CJP) groove weld, what does this mean?
- The weld metal extends through the full thickness of the joint (Correct answer)
- The weld is made from both sides without back gouging
- Penetration exceeds 3/4 of the base metal thickness
- The root pass uses a backing bar on both sides
Correct answer: The weld metal extends through the full thickness of the joint
A CJP weld requires weld metal to fuse and penetrate completely through the full thickness of the joint cross section.
AWS AWS Welding Codes & Standards 5
AWS D1.5 applies specifically to welding of which type of structure?