Weld Inspection and Testing Flashcards
7 cards from real Certified Welder practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Weld Inspection and Testing flashcards as text
What does the term 'sensitivity' mean in the context of nondestructive testing?
Answer: The ability of the test method to detect the smallest relevant discontinuity
Sensitivity in NDT refers to the method's ability to detect the smallest discontinuity of concern within a specific test material.
Which welding defect is most directly associated with excessive travel speed?
Answer: Underfill
Underfill (insufficient weld metal deposited) commonly results from excessive travel speed, leaving the joint cross-section incompletely filled.
What does a weld inspector check when verifying 'weld throat' dimensions?
Answer: The theoretical or actual distance through the center of a fillet weld
The weld throat is the theoretical distance from the root to the face of a fillet weld, which determines its shear strength.
In acoustic emission testing (AET), what triggers the detection of a signal?
Answer: Stress-induced elastic waves released by a growing crack or active flaw
AET detects high-frequency elastic waves (acoustic emissions) generated when a material defect grows or shifts under stress.
A weld inspector notices the weld profile on a groove weld is convex and rises significantly above the base metal surface. This is most accurately described as:
Answer: Excessive reinforcement
Excessive reinforcement occurs when the weld crown projects too far above the base metal surface, potentially creating stress concentrations.
Which of the following best describes 'lamellar tearing'?
Answer: Subsurface cracking in the base metal caused by through-thickness stresses
Lamellar tearing is subsurface base metal cracking caused by through-thickness tensile stresses acting on planes of low ductility material inclusions.
When conducting a hardness test on a weld, which zone typically shows the highest hardness value in a carbon steel weldment?
Answer: Heat-affected zone (HAZ)
The heat-affected zone (HAZ) often shows the highest hardness in carbon steel welds due to rapid thermal cycling creating martensitic microstructures.