Inspection & Quality Control Flashcards
7 cards from real AWS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Inspection & Quality Control flashcards as text
What does a 'weld procedure specification' (WPS) define for inspection purposes?
Answer: The variables and parameters under which a weld must be made
A WPS is a written document that specifies the welding variables (process, base metal, filler metal, preheat, position, etc.) required to produce an acceptable weld.
When inspecting a groove weld cross-section for incomplete joint penetration, what is the inspector evaluating?
Answer: Whether the weld metal fully penetrated to the required depth of the joint
Incomplete joint penetration occurs when the weld metal does not extend to the required depth through the joint, leaving an unfused area at the root.
Which type of weld discontinuity appears as a bright area on a radiograph?
Answer: Tungsten inclusion
Tungsten inclusions appear as bright (light) areas on a radiograph because tungsten is denser than steel and absorbs more radiation.
In liquid penetrant testing, what is the purpose of the developer?
Answer: To draw the penetrant out of discontinuities and create a visible indication
The developer is applied after removing excess penetrant; it draws the trapped penetrant out of discontinuities by capillary action to form visible indications.
What is 'lamellar tearing' in base metal adjacent to welds?
Answer: A subsurface crack caused by high through-thickness stresses on materials with low ductility in that direction
Lamellar tearing is a subsurface cracking that occurs in the base metal parallel to the rolling direction when high through-thickness stresses act on materials with poor short-transverse ductility.
According to AWS D1.1, what is the maximum allowable undercut depth for a statically loaded weld in most applications?
Answer: 1/32 inch (0.8 mm)
AWS D1.1 generally limits undercut to 1/32 inch (0.8 mm) for welds subject to tensile stress and parallel to the weld axis in statically loaded structures.
What is the function of a 'procedure qualification record' (PQR) in the welding quality system?
Answer: It documents the results of testing used to qualify a WPS
A PQR is the record of welding variables used during procedure qualification testing and the test results that demonstrate the WPS produces acceptable welds.