Metal Properties and Panel Behavior Flashcards
6 cards from real Paintless Dent Repair practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Metal Properties and Panel Behavior flashcards as text
What is the difference in PDR behavior between inner and outer panel steel?
Answer: Outer panels are typically thinner and more susceptible to denting but also more accessible for PDR; inner panels are thicker structural steel
Outer body panels are thinner, cosmetic steel designed for appearance and are the primary target of PDR; inner structural panels are thicker and not typically PDR candidates.
How does galvanized steel affect PDR repairability?
Answer: The zinc coating on galvanized steel can flake off at dent edges during PDR if the metal is stressed near paint boundaries
The zinc galvanized coating can separate or flake at the edges of severe dents when the metal is manipulated, potentially compromising corrosion protection and complicating PDR boundaries.
What does 'metal movement' refer to when discussing PDR technique?
Answer: The way force applied at one point travels through the panel and moves surrounding metal during repair
Metal movement describes how pushing force at one point creates ripple effects through the surrounding panel, which technicians must anticipate and control to avoid creating new distortions.
Why is stiffening ribs pressed into door panels both helpful and limiting for PDR?
Answer: Stiffening ribs add structural rigidity that helps the panel hold shape but can block rod access and create tension boundaries that complicate dent repair
Pressed ribs add structural rigidity to door panels, which helps the vehicle hold shape, but they also block PDR rod access to certain dent locations and create tension boundaries that limit metal movement.
What is the effect of paint and primer layers on the underlying metal's behavior during PDR?
Answer: Paint and primer add a thin protective layer but do not significantly change how the metal behaves; they are primarily a surface concern for cracking risk
Paint and primer layers do not significantly alter the metal's mechanical behavior during PDR but are the primary risk point since they can crack if the metal is manipulated too aggressively.
How does the stamping direction of a body panel affect the direction of PDR work?
Answer: Working perpendicular to the stamping direction often encounters more resistance; working parallel to it tends to be more effective
Body panels are stamped with directional grain structure; PDR work that follows the stamping direction tends to move metal more efficiently than work that fights across the grain.