I-CAR Cheat Sheet 2026

The 30 highest-yield I-CAR facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. What is the function of a base coat in paint refinishing? → It provides the color layer of the finish
2. Which weld defect appears as small holes or voids within the weld bead and is often caused by contamination or inadequate shielding gas? → Porosity
3. Why is documentation important in collision repair analysis? → To assist with insurance and repair accuracy
4. What tool is commonly used to measure structural alignment? → Three-dimensional measuring system
5. What is the purpose of OSHA regulations in auto body shops? → To ensure workplace safety and health standards
6. Why is proper mixing of paint important in refinishing? → To ensure uniform color and durability
7. What is the correct surface preparation before applying adhesives? → Cleaning, sanding, and removing contaminants
8. What is the recommended minimum distance between a weld location and any OEM spot weld when adding supplemental MIG plug welds? → 25 mm (1 inch)
9. What is the primary purpose of structural adhesives in collision repair? → To provide structural strength and distribute stress
10. What is the typical curing method for two-part structural adhesives? → Chemical reaction and sometimes heat
11. What does 'wire feed speed' control in a MIG welding setup? → The rate at which filler wire is delivered to the weld pool, which determines amperage
12. Why is structural analysis critical in collision repair? → To ensure vehicle structural integrity is restored
13. Which personal protective equipment (PPE) is specifically required to protect a welder's eyes from UV and IR radiation? → A welding helmet with the appropriate shade lens
14. What is a common cause of color mismatch in refinishing? → Application method and environmental conditions
15. What does a spectrophotometer measure in auto refinishing? → Color and light reflectance properties
16. Which action helps reduce VOC emissions during painting? → Using low-VOC paints
17. Why is proper ventilation important in a spray booth? → To remove hazardous fumes and prevent fires
18. Which of the following repair events MOST commonly triggers the need for a forward-facing camera calibration? → Windshield replacement.
19. Which of the following measurements requires the Digital Volt-Ohm Meter (DVOM) to be connected in series with the circuit being tested? → Amperage (Current)
20. How should mixed adhesive cartridges be stored for reuse? → In cool, dry storage
21. What is the role of the clear coat in refinishing? → To protect and provide a glossy finish
22. Why is it important to follow manufacturer specifications when using adhesives? → It ensures proper bonding and safety
23. What I-CAR training program specifically provides certification in steel GMA (MIG) welding for collision technicians? → Steel GMA Welding (WCS03) qualification test
24. What condition is indicated when a STRSW electrode tip mushrooms or deforms during use? → The electrode needs to be dressed or replaced to restore proper tip geometry
25. What is a primary failure cause in adhesive bonding? → Improper surface preparation or contamination
26. What is the purpose of applying weld-through primer to bare metal flanges before assembling panels for welding? → It protects the hidden flange surfaces from corrosion after welding
27. What does the term 'pulling' refer to in structural repairs? → Realigning damaged structural components
28. Which of the following is the correct action if porosity is discovered in a structural weld on a completed repair? → Grind out the defective weld and re-weld with corrected technique and settings
29. Which type of personal protective equipment (PPE) is essential during paint application? → Respirator mask
30. Which type of weld joint is most commonly used when installing a sectioned structural rail? → Butt weld joint with backing