Ultimate Review Flashcards
7 cards from real CWI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Ultimate Review flashcards as text
Which electrode classification is considered a low-hydrogen electrode?
Answer: E7018
E7018 is a low-hydrogen electrode (indicated by the '8' suffix) requiring moisture-controlled storage and often preheating to prevent hydrogen-induced cracking.
A CWI finds a crack in a completed structural weld. What is the FIRST action the inspector should take?
Answer: Document and report the discontinuity to the responsible party per project procedures
The CWI's primary role is to document and report discontinuities to the responsible party; the inspector does not typically direct repairs or make acceptance decisions unilaterally.
What is the correct technique for measuring the throat of a fillet weld with a fillet weld gauge?
Answer: Measure the leg length and calculate the theoretical throat as 0.707 × leg
The theoretical throat of an equal-leg fillet weld is calculated as 0.707 times the leg length, which is what fillet weld gauges based on leg length reflect.
Lamellar tearing in a weld joint is most likely to occur in:
Answer: T-joints or corner joints with high restraint and through-thickness stress
Lamellar tearing occurs in the base metal of highly restrained T-joints and corner joints due to through-thickness tensile stresses on material with poor through-thickness ductility (low reduction of area).
On a welding procedure specification (WPS), which of the following is an ESSENTIAL variable for SMAW per AWS D1.1?
Answer: Change in post-weld heat treatment (PWHT) when not originally required
Addition of PWHT when it was not part of the original qualified procedure is an essential variable requiring requalification for SMAW per AWS D1.1.
The purpose of interpass temperature control during multi-pass welding is to:
Answer: Prevent excessive grain growth in the HAZ and maintain mechanical properties
Controlling maximum interpass temperature prevents excessive grain coarsening in the heat-affected zone, which would degrade toughness and mechanical properties.
Which destructive test is used to determine the tensile strength of a weld joint transverse to the weld axis?
Answer: Reduced-section tensile test
The reduced-section tensile test pulls a specimen transversely across the weld joint to measure ultimate tensile strength of the weld and adjacent base metal.