1. B
The primary advantage of PDR is that it preserves the vehicle’s original factory finish. This maintains the vehicle’s value and eliminates the need for repainting, color matching, or using body fillers.

2. C
Round, shallow dents with no paint damage are ideal for PDR because the metal hasn’t been excessively stressed, and the intact paint allows for repair without refinishing.

3. A
PDR tools should generally be held at a 90-degree angle perpendicular to the panel to apply direct, controlled pressure to the lowest point of the dent without causing additional damage.

4. B
LED fog boards or line boards create parallel lines of reflection that make low spots (dark lines) and high spots (light lines) easily visible, allowing precise identification of surface irregularities.

5. C
Reading the dent involves carefully analyzing its depth, diameter, location, shape, and characteristics to determine the best approach and sequence for repair.

6. B
Aluminum has less elasticity than steel and is more prone to cracking or work-hardening when manipulated. It requires gentler techniques and often controlled heating.

7. B
A crown refers to the highest point of a raised area, high spot, or the peak of a ridge. Identifying crowns is essential for knowing where to apply knockdown techniques.

8. B
Whale tail tools have a wide, flat tip designed for working on large, flat panels where access is limited, distributing pressure over a larger area.

9. B
Stress relieving involves working around the perimeter of a dent to release tension in the metal before addressing the deepest point, making the repair easier and reducing the risk of creating high spots.

10. C
Location determines accessibility, depth affects repairability, and paint condition determines whether PDR is viable. Damaged paint typically requires conventional repair.

11. B
A sharp dent or crease has a defined ridge or line of impact where the metal has been severely stressed. These are more challenging to repair than round dents.

12. B
Controlled heat softens the clear coat and relaxes the metal, reducing the risk of paint cracking during manipulation and making the metal more pliable.

13. A
Glue pulling uses specialized adhesive tabs attached to the exterior of the dent, which are then pulled using various tools to draw the dent outward, useful when backside access is limited.

14. C
150-180°F is generally safe for modern clear coats. Higher temperatures risk damaging or burning the paint, while lower temperatures may not provide sufficient benefit.

15. B
Metal memory refers to the tendency of metal to return toward its original formed shape when properly manipulated, which is the fundamental principle that makes PDR possible.

16. B
Roof dents are typically accessed by carefully working through the headliner, locating gaps in the roof bracing, or removing interior trim to reach the inner surface.

17. A
Window guards or door braces protect the glass from accidental contact with PDR tools while working inside the door cavity, preventing costly glass breakage.

18. B
PDR stands for Paintless Dent Repair, the technique of removing dents without affecting the vehicle’s paint finish through specialized tools and techniques.

19. B
Reflection boards create a striped or gradient pattern that reflects off the panel surface, making minute surface irregularities visible to the technician.

20. A
Tap down is the technique of carefully reducing high spots or crowns using a knockdown tool or blending hammer, complementing the pushing process from behind.

21. C
Quarter panels are welded to the vehicle structure with limited or no access points, making them the most challenging for PDR tool access compared to other panels.

22. B
Blending hammers spread the impact force over a wider area when tapping down high spots, preventing concentrated damage and creating smoother results.

23. B
R&I means Remove and Install, referring to temporarily removing components like trim, lights, or inner panels to gain access for the repair, then reinstalling them.

24. C
When paint is cracked, chipped, or metal is stretched beyond its elastic limit, PDR cannot restore the panel properly, requiring conventional body repair and refinishing.

25. B
Interchangeable tips allow technicians to select the appropriate size and shape for different dent configurations, improving precision and efficiency.

26. B
Fog or line board reflection uses parallel lines that distort when viewed over an imperfect surface, clearly revealing highs and lows in the panel.

27. B
A ding is industry terminology for a small, minor dent typically less than one inch in diameter, often caused by door impacts or small debris.

28. B
Window wedges create a protected gap between the window glass and door frame, allowing tool insertion without damaging weather seals or scratching glass.

29. B
Working from outside in means addressing the outer perimeter and edges of a dent first to release tension before pushing up the deepest center point.

30. B
Excessive pressure creates a high spot or “pimple” that rises above the original surface level, requiring additional knockdown work to correct.

31. B
Hail damage refers to multiple dents of varying sizes caused by ice balls (hailstones) during severe weather, often covering large portions of a vehicle.

32. B
Aluminum has less metal memory than steel, work-hardens quickly, and is more prone to cracking. It requires modified techniques, often including heat application.

33. B
Dead blow and soft-faced hammers absorb impact and don’t bounce, providing controlled knockdown force without damaging the paint surface or creating additional high spots.

34. B
Dent depth gauges measure how deep a dent is from the surrounding surface, helping technicians estimate repair difficulty, time required, and whether PDR is appropriate.

35. B
Cross-checking involves examining the repaired area from multiple angles and lighting positions to verify complete correction and ensure no remaining imperfections.

36. B
Door trim panels (door cards) and vapor barriers must be removed to access the inner door cavity where PDR tools can reach dents on the outer skin.

37. B
OEM finish refers to the Original Equipment Manufacturer’s factory-applied paint, which PDR preserves, maintaining vehicle value and warranty integrity.

38. A
Working near power window motors, switches, and wiring presents electrical shock hazards. Disconnecting the battery before interior work is a recommended safety practice.

39. A
Elastic deformation is temporary and the metal returns to its original shape when force is removed. Plastic deformation is permanent, occurring when metal is stressed beyond its yield point.

40. B
LED line boards offer superior portability, durability, consistent brightness, lower heat output, and longer lifespan compared to fluorescent alternatives.

41. B
Picking refers to making precise, controlled small pushes with a sharp-tipped tool to raise specific low spots. This technique requires accuracy and is used for fine detail work and finishing.

42. B
A brace bar or fulcrum provides a pivot point and leverage for PDR rods, allowing technicians to apply controlled pressure with less physical effort while maintaining precision.