I-CAR Structural study guide
I-CAR Structural · Work through your exam, one topic at a time.
The I-CAR Structural credential is a professional qualification for collision repair technicians who work on a vehicle's structural components rather than bolt-on panels. It signals that a technician can inspect and analyze structural damage, interpret vehicle construction and repair terminology, measure and fixture a vehicle back to specification, and perform the welding, sectioning, and panel-replacement operations that structural repair requires. The I-CAR Structural study guide has 10 sections and about 3,086 words.
01Structural Inspection and Damage Analysis
Inspection questions test whether you can find all the damage, not just the obvious hit, and turn those findings into a repair plan. Damage analysis is energy analysis: force enters at the impact point (direct damage) and travels through the structure along load paths, producing indirect damage at kinks, joints, and mounting points far from the bumper.
350 words, about 2 min02Collision Repair Terminology and Vehicle Construction
Body-over-frame: a ladder frame carries the loads and the body is isolated on mounts. Straightening loads usually go to the frame, so cab damage is often more limited than it looks.
324 words, about 2 min03Measuring, Gauging, and Fixturing
Dedicated gauges are part-specific; universal and tram gauges compare two points or a centerline. They are fast but only verify the points they actually touch.
311 words, about 2 min04Straightening and Pulling Operations
Straightening reverses the collision. Pull along the line of the original impact from a properly anchored vehicle, using several controlled pulls rather than one large one.
295 words, about 1 min05Structural Welding (Squeeze-Type Resistance Spot Welding)
Current passes through copper electrodes and through the panels; resistance at the sheet-to-sheet interface generates the heat, while electrode force holds the panels together as the nugget forms. Quality depends on current, weld time, electrode force, tip condition and alignment, and the material stack.
320 words, about 2 min06MIG/MAG Welding and Sectioning Joints
MIG/MAG (GMAW) uses a continuous wire electrode with shielding gas. Two common collision-repair variants are steel wire with an argon/CO2 mix, and MIG brazing with copper-silicon wire where dilution of a coated or heat-sensitive base metal must be avoided.
300 words, about 2 min07Panel Replacement
Bolted parts such as fenders, doors, and hoods come off with hand tools. Welded parts such as quarter panels, roofs, and rail sections come off by drilling spot welds or cutting at factory seams.
289 words, about 1 min08Adhesive Bonding and Rivet Bonding
Two-part epoxy and urethane structural adhesives carry load and damp vibration. Bond strength depends more on surface preparation than on the adhesive itself: abrade, clean, and prime exactly as directed.
318 words, about 2 min09Corrosion Protection and Restorative Coatings
Every weld, cut, grind, and sanded area removes factory e-coat. Corrosion begins at bare steel, in lapped weld flanges, and inside closed sections where moisture collects and never dries.
285 words, about 1 min10Advanced High-Strength Steel and Mixed-Material Handling
HSLA, dual phase, TRIP, complex phase, martensitic, and press-hardened (boron) steel gain strength from microstructure, not just thickness. As strength rises, elongation falls, so cold working and heat both reduce the ductility that remains.
294 words, about 1 min