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MITO Collision Repair L4 study materials
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MITO Collision Repair L4 practice questions

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Question 1Collision Repair

A technician is preparing a high-strength steel (HSS) rocker panel for sectioning. Which procedure is correct?

  1. Weld the section with gas metal arc welding at high amperage without any backing plate
  2. Cut only in the designated sectioning area and use a squeeze-type resistance spot welder for the new joint Correct answer.
  3. Use an oxy-acetylene torch to cut and braze the replacement section
  4. Apply heat until the panel glows red so the steel softens before cutting

Explanation

High-strength steels lose their designed strength when overheated, so manufacturers restrict heat and require cutting only in approved sectioning zones. Squeeze-type resistance spot welding is the standard method for joining HSS panels because it concentrates heat narrowly at the joint.

Question 2Collision Repair

When measuring a unibody vehicle on a bench system, which reference is used to determine whether the structure is within tolerance?

  1. The diameter of the wheel arch opening
  2. The distance between the two front fenders
  3. The gap between the hood and the cowl
  4. The manufacturer's published control-point dimensions Correct answer.

Explanation

Control-point dimensions are the manufacturer's specified measurements between designated points on the underbody and are the authoritative reference for structural straightening. Cosmetic panel gaps are used as a secondary check but do not define structural tolerance.

Question 3Collision Repair

A vehicle has been in a collision and the SRS airbag did not deploy. What should the technician do before performing any structural repair?

  1. Disconnect the battery, wait the specified time, and follow the manufacturer's SRS disable procedure Correct answer.
  2. Reset the SRS light by disconnecting the module
  3. Test the airbag circuit with a standard 12-volt test light
  4. Remove the steering wheel airbag module while the battery is still connected

Explanation

SRS systems store reserve power, so the battery must be disconnected and the specified wait time observed before any work near airbag circuits. Manufacturer procedures must be followed to prevent accidental deployment and personal injury.

Question 4Collision Repair

Which welding process is most commonly recommended by vehicle manufacturers for joining galvanized steel body panels?

  1. Oxy-acetylene welding
  2. Squeeze-type resistance spot welding Correct answer.
  3. Gas metal arc welding with silicon bronze wire
  4. Shielded metal arc welding

Explanation

Squeeze-type resistance spot welding is the preferred factory-style method for galvanized steel because it minimizes heat and preserves the zinc coating around the joint. Gas metal arc welding can be used but requires specific wire and coating removal procedures.

Question 5Collision Repair

A technician is repairing a plastic bumper cover made of polypropylene. Which step is essential before applying adhesive?

  1. Apply a coat of primer designed for steel
  2. Identify the plastic type and use the matching repair system Correct answer.
  3. Heat the bumper with a heat gun until it becomes tacky
  4. Sand the surface with 36-grit paper and apply adhesive immediately

Explanation

Different plastics require specific repair systems, and polypropylene typically needs a specialized adhesion promoter. Identifying the substrate first prevents adhesion failure and ensures the repair holds.

Question 6Collision Repair

Which condition is a sign that a unibody rail has been damaged beyond simple cosmetic repair?

  1. A small scratch on the outer rail surface
  2. A visible kink or buckle in the rail Correct answer.
  3. Loose trim clips on the fender liner
  4. Minor paint chipping on the wheel arch

Explanation

A kink or buckle indicates the rail has yielded and lost structural integrity, requiring straightening or replacement. Surface scratches and cosmetic damage do not affect structural performance.

Question 7Collision Repair

When mixing a two-component epoxy primer, what is the primary consequence of using the wrong mix ratio?

  1. The primer will require additional thinner
  2. The primer will not cure properly and may fail to adhere Correct answer.
  3. The primer will change color
  4. The primer will dry faster than expected

Explanation

Epoxy primers rely on a precise chemical reaction between resin and hardener; an incorrect ratio leaves unreacted components that prevent full cure and adhesion. Color and dry time may vary slightly but are not the primary concern.

Question 8Collision Repair

Which tool is used to measure the thickness of paint on a vehicle panel before sanding?

  1. Paint thickness gauge Correct answer.
  2. Micrometer
  3. Feeler gauge
  4. Torque wrench

Explanation

A paint thickness gauge measures the depth of the existing coating, allowing the technician to determine how much material can be removed safely. This prevents sanding through the factory coating and exposing bare substrate.

Question 9Collision Repair

A vehicle's steering wheel is off-center after a collision repair, with the rear thrust angle confirmed to be zero. Which alignment angle is most directly affected?

  1. Thrust angle
  2. Toe Correct answer.
  3. Camber
  4. Caster

Explanation

Toe is adjusted by changing the length of the tie rods, which directly controls the direction the front wheels point. With rear thrust-angle error excluded, unequal individual front toe settings can explain the off-center steering wheel.

Question 10Collision Repair

Which of the following is the correct method for checking a vehicle's frame for diamond damage?

  1. Measure the diagonals between opposite control points Correct answer.
  2. Measure the length of the front bumper
  3. Check the tire pressure on all four wheels
  4. Inspect the paint for cracks

Explanation

Diamond damage occurs when one side of the frame is pushed forward relative to the other, which is detected by comparing diagonal measurements between opposite control points. Equal diagonals indicate the frame is square.

Question 11Collision Repair

What is the purpose of a backing plate when making a butt weld on a structural panel?

  1. To increase weld spatter
  2. To add decorative trim
  3. To support the weld and prevent burn-through Correct answer.
  4. To cool the weld faster

Explanation

A backing plate supports the molten weld pool and helps prevent burn-through on thin sheet metal. It also helps achieve full penetration and a stronger joint.

Question 12Collision Repair

A technician is using a MIG welder on 0.8 mm sheet steel. Which parameter adjustment best prevents burn-through?

  1. Increase shielding gas flow to maximum
  2. Reduce voltage and use a slower wire feed speed Correct answer.
  3. Increase wire feed speed and voltage
  4. Use a larger wire diameter

Explanation

Thin sheet steel requires lower heat input, so reducing voltage and wire feed speed prevents the arc from melting through the panel. Increasing heat or wire size would worsen burn-through.

Question 13Collision Repair

Which document should a technician consult to determine the correct repair procedure for a specific vehicle model?

  1. A generic aftermarket parts catalog
  2. The tire placard
  3. The manufacturer's collision repair information Correct answer.
  4. The vehicle owner's manual

Explanation

Manufacturer collision repair information provides model-specific procedures, materials, and sectioning guidelines. Relying on generic sources can lead to improper repairs and safety risks.

Question 14Collision Repair

When replacing a quarter panel, what is the primary reason for using a panel adhesive instead of welding on a modern vehicle?

  1. Adhesive avoids heat distortion and preserves corrosion protection Correct answer.
  2. Adhesive is cheaper than welding wire
  3. Adhesive is faster to apply than spot welding
  4. Adhesive is required by law

Explanation

Panel adhesives bond without the heat of welding, which prevents distortion and preserves the galvanized or e-coated corrosion protection on the panels. This is especially important on high-strength and ultra-high-strength steels.

Question 15Collision Repair

Which safety measure is required when sanding body filler?

  1. Wear only gloves
  2. Use a high-speed grinder without a guard
  3. Wear a dust mask or respirator and eye protection Correct answer.
  4. Work in a closed area to contain dust

Explanation

Sanding body filler generates fine dust that can be harmful if inhaled, so a suitable respirator and eye protection are required. Proper ventilation and dust extraction further reduce exposure.

Question 16Collision Repair

A vehicle's door is misaligned after replacement. Which adjustment should be made first?

  1. Adjust the striker plate
  2. Adjust the door latch
  3. Adjust the window regulator
  4. Adjust the door hinges at the body side Correct answer.

Explanation

Door alignment should begin at the hinges, which control the door's position in the opening. The striker and latch are adjusted after the door is properly positioned within the aperture.

Question 17Collision Repair

Which type of damage is indicated by a rippled or wavy appearance along the side of a unibody vehicle after a collision?

  1. Paint sagging from a previous repair
  2. Mild cosmetic scuffing
  3. Stress deformation in the body side structure Correct answer.
  4. Normal manufacturing variation

Explanation

Waviness along the body side often indicates that the structure has absorbed collision energy and deformed, requiring measurement and possible straightening. Cosmetic scuffing and paint defects do not produce structural ripples.

Question 18Collision Repair

What is the correct procedure for storing a high-pressure gas cylinder in a body shop?

  1. Lay it horizontally on the floor
  2. Remove the valve cap to allow pressure relief
  3. Secure it upright with a chain or strap and keep the valve cap on when not in use Correct answer.
  4. Store it near a heat source to prevent freezing

Explanation

Compressed gas cylinders must be stored upright and secured to prevent falling, with valve protection caps in place when not in use. Heat sources and unsecured storage create serious hazards.

Question 19Collision Repair

A technician is blending a basecoat into an adjacent panel. Which technique helps achieve an invisible blend?

  1. Apply clearcoat directly over the sanded area without basecoat
  2. Apply a heavy coat of basecoat over the entire panel
  3. Sand the blend area with coarse paper before painting
  4. Use a blending solvent and fade the basecoat within the blend area Correct answer.

Explanation

Blending solvent softens the edge of the new basecoat so it melts into the existing finish, creating a seamless transition. Fading the color within a defined blend area avoids a visible color edge.

Question 20Collision Repair

Which factor most affects the choice between repairing and replacing a damaged aluminum panel?

  1. The age of the tires
  2. The color of the vehicle
  3. The alloy type and the extent of deformation Correct answer.
  4. The brand of paint used

Explanation

Aluminum alloys vary in formability and repairability, and severe deformation may exceed the material's ability to be straightened without cracking. The alloy and damage severity therefore drive the repair-versus-replace decision.

Question 21Collision Repair

What is the recommended method for cutting a sectioning joint on a high-strength steel B-pillar?

  1. Use an oxy-acetylene torch to cut through the pillar
  2. Use a chisel and hammer
  3. Use a plasma cutter at maximum power
  4. Use a reciprocating saw or cut-off wheel and follow the manufacturer's sectioning location Correct answer.

Explanation

Mechanical cutting methods such as a reciprocating saw or cut-off wheel limit heat input and preserve the strength of the surrounding HSS. The manufacturer specifies where the sectioning joint may be located.

Question 22Collision Repair

A vehicle has a repaired front rail, and the technician notices the hood sits higher on one side. Which measurement should be verified first?

  1. The battery voltage
  2. The control-point dimensions of the front body structure Correct answer.
  3. The tire tread depth
  4. The radiator hose length

Explanation

Uneven hood height after rail repair usually indicates that the front structure is not correctly positioned, so control-point dimensions should be rechecked. Correcting the structure first prevents compounding alignment errors.

Question 23Collision Repair

Which consideration is most important when using a resistance spot welder on a replacement panel that has e-coating?

  1. Remove all e-coating from the entire panel
  2. Increase the welding current to maximum
  3. Weld through the coating without any preparation
  4. Clean the welding tips and ensure the coating is removed only at the weld locations Correct answer.

Explanation

E-coating is an insulator that can prevent proper current flow, so it must be removed at the weld spots while leaving the rest of the panel protected. Clean tips ensure consistent weld quality.

Question 24Collision Repair

Which statement best describes the effect of a vehicle's crumple zone on collision repair decisions?

  1. Crumple zones are designed to deform and must be restored to original geometry to absorb energy correctly Correct answer.
  2. Crumple zones should be reinforced with extra steel
  3. Crumple zones can be repaired with body filler
  4. Crumple zones are cosmetic and can be ignored

Explanation

Crumple zones are engineered to collapse in a controlled manner, so their geometry and material properties must be restored during repair. Altering them with filler or reinforcement compromises occupant protection.

Question 25Collision Repair

Which procedure is correct for refinishing a panel that has been repaired with body filler?

  1. Apply a primer-surfacer over the filler, block sand, then apply basecoat and clearcoat Correct answer.
  2. Apply clearcoat over the filler and skip the basecoat
  3. Apply basecoat over the filler without sanding
  4. Apply topcoat directly over the sanded filler

Explanation

Primer-surfacer fills minor imperfections and provides a uniform surface for the topcoat, and block sanding ensures flatness. Basecoat and clearcoat then provide color and protection.

Question 26Collision Repair

During a structural straightening pull on a unitized body, which measurement best confirms that the repair has restored the vehicle to factory geometry?

  1. A visual check that the gaps around the doors look even
  2. A check that the vehicle drives straight at highway speed
  3. A tape measure reading taken diagonally across the engine bay
  4. A three-dimensional datum and control-point measurement compared with factory specifications Correct answer.

Explanation

Structural correction must be verified against the manufacturer's published datum, control-point, and reference dimensions using a measuring system. Even panel gaps and diagonal tape readings can be produced with the body still out of specification. A road test confirms drivability but not dimensional accuracy.

Question 27Collision Repair

A technician must remove a factory spot weld without enlarging the hole in the underlying panel. Which tool is designed specifically for this task?

  1. A reciprocating saw with a metal blade
  2. A cold chisel and a 2 kg hammer
  3. A 115 mm angle grinder with a cutting disc
  4. A spot weld drill with a spring-loaded pilot Correct answer.

Explanation

A spot weld drill uses a spring-loaded pilot that centers on the weld nugget and limits cutting depth so the base panel is not pierced. Grinders and saws cut through both layers indiscriminately. A chisel tears and deforms the sheet metal.

Question 28Collision Repair

A panel is being refinished with a clearcoat over a metallic basecoat. Which practice prevents a dry, mottled appearance in the metallic layer?

  1. Using a slower reducer and a larger fluid tip
  2. Applying thin, uniform coats with a consistent overlap and correct gun distance Correct answer.
  3. Applying the metallic coat in one heavy wet pass
  4. Increasing the air pressure well above the manufacturer's recommendation

Explanation

Metallic orientation depends on how the flakes settle, which is controlled by thin, even coats, consistent overlap, and correct gun distance and speed. A single heavy pass causes runs and uneven flake orientation. Excess air pressure causes dry spray and mottling rather than preventing it.

Question 29Collision Repair

Which statement correctly describes the role of the vehicle's occupant restraint system in a collision repair plan?

  1. Deployed airbags and pretensioners must be replaced or serviced per the manufacturer's published procedure Correct answer.
  2. SRS components may be repaired with adhesive if the housing is intact
  3. The SRS can be reactivated once the battery is reconnected after body repair
  4. Only the airbag that deployed needs attention; other components can be reused without inspection

Explanation

Restraint system components are single-use safety devices, and the manufacturer's procedure governs replacement, inspection, and diagnostic clearing. Adhesive repairs and reuse of unverified components are not permitted. Reactivating the system requires proper diagnosis and confirmation that all components and wiring are serviceable.

Question 30Collision Repair

A technician is preparing a steel panel for body filler. Which surface preparation step most directly prevents filler from losing adhesion later?

  1. Sanding to a 24-grit scratch pattern and wiping with a dry rag
  2. Applying filler directly over the original glossy topcoat
  3. Grinding to bare metal with a coarse disc and leaving deep gouges
  4. Feathering the edges and creating a fine scratch pattern on clean bare metal Correct answer.

Explanation

Filler bonds mechanically, so the surface must be clean bare metal with a fine, even scratch pattern and feathered edges. Glossy paint and deep gouges both compromise adhesion. Coarse scratches trap air and solvent and can telegraph through the repair.

Question 31Collision Repair

Which factor most directly determines whether a damaged aluminum outer panel should be repaired or replaced?

  1. The technician's personal preference for filler versus replacement
  2. The color of the vehicle and the age of the paint
  3. The cost of the replacement panel alone
  4. The manufacturer's published repair limits and the alloy's formability Correct answer.

Explanation

Aluminum alloys vary widely in ductility, and manufacturers publish specific limits on heat, straightening, and sectioning. Those limits plus the alloy's formability govern repairability. Paint color, personal preference, and part price alone are not engineering criteria.

Question 32Collision Repair

What is the primary function of a torque-to-yield bolt in a suspension or structural joint?

  1. It is tightened to a specified torque plus an additional angle so it clamps consistently Correct answer.
  2. It can be reused indefinitely as long as it is cleaned
  3. It is tightened by feel until the joint stops moving
  4. It is designed to loosen under impact to absorb energy

Explanation

Torque-to-yield fasteners are tightened into their elastic-plastic range using a torque plus angle specification, which produces a consistent clamp load. They are generally single-use because they have already been stretched. They are not designed to loosen in a collision.

Question 33Collision Repair

A vehicle arrives with the front bumper cover cracked and the absorber crushed. Which inspection step should be completed before refinishing the new cover?

  1. Sand and prime the new cover immediately to save time
  2. Reuse the crushed absorber if it still fits behind the cover
  3. Check the energy absorber, reinforcement bar, and mounting points for damage and confirm part numbers Correct answer.
  4. Refinish the cover before test-fitting it to the vehicle

Explanation

The bumper is an energy-management system, so the absorber, reinforcement, and attachments must be inspected and correct parts confirmed before cosmetic work. Reusing a crushed absorber removes its energy-absorbing capacity. Refinishing before test-fitting risks damage and misalignment.

Question 34Collision Repair

Which practice is correct when welding near a vehicle's electronic control modules and wiring harnesses?

  1. Disconnect and isolate modules per the manufacturer's procedure and attach the ground clamp close to the weld Correct answer.
  2. Weld with the key on to keep the electrical system stabilized
  3. Leave the battery connected so modules stay powered during welding
  4. Attach the ground clamp to the far end of the frame to spread current

Explanation

Welding current can travel through harnesses and damage electronics, so manufacturers specify disconnection and isolation of modules and a ground clamp placed close to the work. A distant ground forces current through the vehicle structure and wiring. Leaving the system powered increases the risk of damage.

Question 35Collision Repair

A technician is asked to section a quarter panel on a vehicle with a galvanized coating. Which step protects the corrosion resistance of the joint?

  1. Apply body filler directly over the welded seam
  2. Remove coating only in the weld zone and apply a zinc-rich coating to the finished joint Correct answer.
  3. Weld through the coating without preparation and rely on seam sealer
  4. Grind all coating from both sides of the joint before welding

Explanation

Galvanized coatings must be removed only where welding requires it, then restored with a zinc-rich product and seam sealer to protect the joint. Grinding the entire panel destroys the protective layer. Welding through intact coating produces porosity and toxic fumes.

Question 36Collision Repair

Which statement best explains why a plastic bumper cover repair may fail months after a correct-looking repair?

  1. The repair was sanded with too fine a paper before topcoat
  2. The topcoat was applied in a spray booth
  3. The cover was washed with soap and water before repair
  4. The substrate was identified incorrectly, so an incompatible adhesion promoter was used Correct answer.

Explanation

Modern bumper covers use different plastic families, and each requires a matching adhesion promoter and repair material. Misidentification produces a bond that looks acceptable initially but delaminates later. Washing, sanding grit, and booth application are normal steps that do not cause latent failure.

Question 37Collision Repair

What does a four-wheel alignment printout showing excessive cross camber on the front axle most likely indicate after a collision repair?

  1. The rear toe is out of specification
  2. The tire pressures are all correct
  3. A bent spindle, control arm, or strut on one side Correct answer.
  4. The steering wheel is centered

Explanation

Cross camber compares camber left to right; a large difference points to a bent or damaged suspension component on one side. Rear toe and steering wheel centering affect other readings. Correct tire pressures rule out a pressure-related cause.

Question 38Collision Repair

Which action is required before a technician begins a repair that involves welding on a high-voltage electric vehicle?

  1. Wear only standard cotton work gloves
  2. Ask the customer to switch off the vehicle with the key fob
  3. Disable the high-voltage system per the manufacturer's procedure and verify zero voltage Correct answer.
  4. Remove the 12 V battery and begin welding immediately

Explanation

High-voltage systems must be de-energized using the manufacturer's procedure, and the technician must verify the absence of voltage before work begins. Standard gloves offer no electrical protection. Removing the 12 V battery alone does not de-energize the traction system.

Question 39Collision Repair

A technician is diagnosing a water leak into the trunk after a rear collision repair. Which method is most appropriate for locating the entry point?

  1. Wait for rain and check the carpet later
  2. Seal all seams with silicone and hope the leak stops
  3. Pour water over the closed trunk and watch from outside
  4. Spray the seams with water while an assistant observes from inside the trunk with the trim removed Correct answer.

Explanation

Water testing with an observer inside the stripped trunk localizes the entry point at the seam or grommet. Observing from outside cannot reveal where water crosses the interior boundary. Blind sealing and waiting for rain are not diagnostic.

Question 40Collision Repair

Which property of boron steel most affects the repair method chosen for a B-pillar?

  1. Its very high tensile strength, which limits heat and straightening Correct answer.
  2. Its ability to be softened by any heat source
  3. Its resistance to painting
  4. Its low melting point compared with mild steel

Explanation

Boron and other ultra-high-strength steels achieve strength through a specific microstructure, and manufacturers restrict heat and straightening to preserve it. They do not have a low melting point, and uncontrolled heat can degrade rather than restore properties. Paint adhesion is unrelated to the repair limit.

Question 41Collision Repair

Which consideration governs whether a door skin can be replaced rather than the entire door shell?

  1. The price of a complete door shell
  2. The color of the replacement skin
  3. Whether the door's inner structure and frame are undamaged and the manufacturer permits skinning Correct answer.
  4. The age of the vehicle's tires

Explanation

Skin replacement is acceptable only when the inner panel, frame, and hinge area are sound and the manufacturer's procedure allows it. Color, shell price, and unrelated vehicle condition do not determine structural suitability.

Question 42Collision Repair

A customer complains of a wind whistle at the top of the driver's door after a repair. Which adjustment is most likely to correct it?

  1. Increasing the door striker engagement depth
  2. Adjusting the door's in/out position at the upper hinge and checking the weatherstrip seal Correct answer.
  3. Reducing the tire pressure
  4. Replacing the door glass

Explanation

Wind noise at the top of the door usually means the upper door edge sits proud or inboard of the aperture, breaking the weatherstrip seal. Adjusting the upper hinge in/out position and inspecting the seal addresses the cause. Striker depth affects latch effort, not the top seal.

Question 43Collision Repair

Which statement about sectioning a structural rail is correct?

  1. A butt joint with no backing is acceptable for all rail sections
  2. A sectioning joint may be placed anywhere convenient for the technician
  3. Sectioning is prohibited on all vehicles regardless of manufacturer guidance
  4. The manufacturer specifies approved sectioning locations and joining methods that must be followed Correct answer.

Explanation

Manufacturers publish approved sectioning locations, joint designs, and welding or adhesive methods because these control load path and crash performance. Arbitrary placement or unsupported butt joints can create weak points. Blanket prohibition ignores documented procedures.

Question 44Collision Repair

What is the main reason for applying a conversion coating to bare steel before primer?

  1. To replace the need for a primer coat
  2. To improve corrosion resistance and primer adhesion on the prepared metal Correct answer.
  3. To speed up the drying of body filler
  4. To fill deep scratches in the panel

Explanation

Conversion coatings chemically prepare bare metal, enhancing adhesion and corrosion protection under primer. They do not fill scratches or substitute for primer. They also have no role in filler drying.

Question 45Collision Repair

A repair estimate lists a used OEM headlamp assembly for a vehicle with advanced driver assistance features. Which check is most important before installation?

  1. Confirming the lamp's cosmetic condition only
  2. Checking that the lamp is the same color as the vehicle
  3. Confirming the lamp fits in the box
  4. Verifying part number compatibility and that camera or sensor calibration requirements are met Correct answer.

Explanation

ADAS features often depend on specific lamp and sensor part numbers and on post-repair calibration. A cosmetically acceptable used lamp can still be incompatible. Color match and packaging are not functional criteria.

Question 46Collision Repair

Which PPE is essential when spraying two-component polyurethane clearcoat in a booth?

  1. Ear plugs and a bump cap
  2. A supplied-air respirator and full skin coverage Correct answer.
  3. Cotton gloves and a face shield
  4. A dust mask and safety glasses

Explanation

Isocyanate-containing clearcoats require a supplied-air respirator and skin protection because the hazard is inhalation and dermal absorption. Dust masks do not filter isocyanate vapor. Cotton gloves and hearing protection do not address chemical exposure.

Question 47Collision Repair

A vehicle's thrust angle is out of specification after rear structural repair. Which condition does this most directly describe?

  1. The front camber is excessive
  2. The front toe is set incorrectly
  3. The steering wheel is not centered
  4. The rear axle is not square to the vehicle's centerline Correct answer.

Explanation

Thrust angle describes the direction the rear axle points relative to the vehicle centerline. A non-square rear axle causes the thrust angle to deviate. Front toe, front camber, and steering wheel centering are separate measurements.

Question 48Collision Repair

Which method best verifies that a repaired aluminum panel has been properly prepared before applying a primer designed for aluminum?

  1. Apply primer over the existing anodized finish without sanding
  2. Use a steel-only etching primer
  3. Sand, clean, and apply the specified aluminum pretreatment, then confirm the surface is uniformly prepared Correct answer.
  4. Wipe the panel with a solvent and apply primer immediately

Explanation

Aluminum requires mechanical preparation, thorough cleaning, and the manufacturer's specified pretreatment before the correct primer is applied. Solvent wiping alone leaves oxide and contamination. Steel-only etch primers are not formulated for aluminum.

Question 49Collision Repair

Why must a technician document pre-repair measurements and photographs before straightening begins?

  1. To decide which tire brand to install
  2. To establish a baseline that supports the repair plan and later verification of restored geometry Correct answer.
  3. To determine the vehicle's resale value
  4. To satisfy paint warranty requirements

Explanation

Baseline measurements and photos record the damage state and support both the repair plan and the final verification that geometry was restored. They are not a paint warranty record, a valuation tool, or a tire selection input.

Question 50Collision Repair

A technician finds that a replacement hood does not align with the fenders after installation. Which sequence is most appropriate for diagnosis?

  1. Bend the fenders outward to match the hood
  2. Check hinge adjustment, hood position, and cowl alignment before altering any panel Correct answer.
  3. Add filler to the hood edges to close the gaps
  4. Replace the fenders without further inspection

Explanation

Misalignment should be diagnosed systematically by checking hinge adjustment, hood position, and cowl alignment before any panel is altered. Bending fenders or adding filler treats symptoms and can damage the vehicle. Replacing fenders without diagnosis may not solve the cause.