Unitized Structural Body Repair Exam
UPDATED ACTUAL QUESTIONS AND
CORRECT ANSWERS
Unibody - CORRECT ANSWERS Lightweight stamped sheet metal components that
are welded to each other to create a single unit.
Space Frame - CORRECT ANSWERS Body panels can be made from plastic are steel.
Steel may be Mild, Intermediate, or HSS. Panels may hide damage to frame or structure.
Crush Zones - CORRECT ANSWERS Structural components such as rails are
designed to collapse and bend at specific points.
Collision Energy Management - CORRECT ANSWERS Goal is passenger protection.
Front and rear structures act as crush-able energy absorbers.
Direct Damage - CORRECT ANSWERS POI. Easily located and diagnosed.
Indirect Damage - CORRECT ANSWERS transmission of collision energy beyond the
area of immediate impact. Examples; Split seam sealers, pulled spot welds, misaligned
panels, buckles in steel, cracked glass, and cracked or chipped paint.
Passive Restraint Systems - CORRECT ANSWERS Must have service manual. No two
are alike.
Datum - CORRECT ANSWERS Imaginary plane or line beneath the vehicle. Measures
height.
Centerline - CORRECT ANSWERS Vertical plane that passes from the front of the
vehicle to the rear. Measures Width. May have stamped marks on vehicle body structure. Is
confirmed by referencing at last 3 width measurements in the undamaged portion of the
vehicle.
, Zero Planes - CORRECT ANSWERS Vertical plane that passes from side to side.
Confirmed by measuring 3 length measurements from the undamaged portion of the vehicle.
Symmetry - CORRECT ANSWERS Equal on each side of the vehicle.
Asymmetrical - CORRECT ANSWERS Unequal on each side of the vehicle. (spare
tire well)
Reference Points - CORRECT ANSWERS Bolts or nuts, Holes, Mechanical
attachment points, Edges of panels, Door strikers, Corner of openings. Common tolerance is
=/.3mm (1/8) or all the way to 1mm (1.32).
Loaded Measurements - CORRECT ANSWERS Drivetrain In
Unloaded Measurements - CORRECT ANSWERS Drivetrain out
Point to Point Measurements - CORRECT ANSWERS shortest distance between 2
reference points. AKA "as the crow flies". Uses tram or steel tape measure.
Datum Measurements - CORRECT ANSWERS Taken at Datum plane, height
differences between reference points. Laser measuring system
Computerized Measuring System - CORRECT ANSWERS compare data stored in a
software program or a central database. Get hard copy of measurements. Can watch while
pulling.
Steel - CORRECT ANSWERS Cannot know what kind by visible. Must check service
manual.
Tensile Strength - CORRECT ANSWERS Amount of pressure/force necessary to
fracture or tear steel.
UPDATED ACTUAL QUESTIONS AND
CORRECT ANSWERS
Unibody - CORRECT ANSWERS Lightweight stamped sheet metal components that
are welded to each other to create a single unit.
Space Frame - CORRECT ANSWERS Body panels can be made from plastic are steel.
Steel may be Mild, Intermediate, or HSS. Panels may hide damage to frame or structure.
Crush Zones - CORRECT ANSWERS Structural components such as rails are
designed to collapse and bend at specific points.
Collision Energy Management - CORRECT ANSWERS Goal is passenger protection.
Front and rear structures act as crush-able energy absorbers.
Direct Damage - CORRECT ANSWERS POI. Easily located and diagnosed.
Indirect Damage - CORRECT ANSWERS transmission of collision energy beyond the
area of immediate impact. Examples; Split seam sealers, pulled spot welds, misaligned
panels, buckles in steel, cracked glass, and cracked or chipped paint.
Passive Restraint Systems - CORRECT ANSWERS Must have service manual. No two
are alike.
Datum - CORRECT ANSWERS Imaginary plane or line beneath the vehicle. Measures
height.
Centerline - CORRECT ANSWERS Vertical plane that passes from the front of the
vehicle to the rear. Measures Width. May have stamped marks on vehicle body structure. Is
confirmed by referencing at last 3 width measurements in the undamaged portion of the
vehicle.
, Zero Planes - CORRECT ANSWERS Vertical plane that passes from side to side.
Confirmed by measuring 3 length measurements from the undamaged portion of the vehicle.
Symmetry - CORRECT ANSWERS Equal on each side of the vehicle.
Asymmetrical - CORRECT ANSWERS Unequal on each side of the vehicle. (spare
tire well)
Reference Points - CORRECT ANSWERS Bolts or nuts, Holes, Mechanical
attachment points, Edges of panels, Door strikers, Corner of openings. Common tolerance is
=/.3mm (1/8) or all the way to 1mm (1.32).
Loaded Measurements - CORRECT ANSWERS Drivetrain In
Unloaded Measurements - CORRECT ANSWERS Drivetrain out
Point to Point Measurements - CORRECT ANSWERS shortest distance between 2
reference points. AKA "as the crow flies". Uses tram or steel tape measure.
Datum Measurements - CORRECT ANSWERS Taken at Datum plane, height
differences between reference points. Laser measuring system
Computerized Measuring System - CORRECT ANSWERS compare data stored in a
software program or a central database. Get hard copy of measurements. Can watch while
pulling.
Steel - CORRECT ANSWERS Cannot know what kind by visible. Must check service
manual.
Tensile Strength - CORRECT ANSWERS Amount of pressure/force necessary to
fracture or tear steel.
