Exam 2 Flashcards
Although pulling equipment comes in a variety of shapes and styles, it all has just one function: to apply a _______ force to correct collision damage.
Controlled
When heating the damaged area on the side with the buckle, heat the buckled area. On the opposite side of the buckle: heat an area that is approximately ____ to ____ times the size of the buckled area.
Five
Seven
____ body sectioning is the most severe or extensive form of reworking the passenger compartment.
Full body
The pulling forces must never be ______ than the combined anchoring force.
Larger
When doing a butt joint with insert the width of the gap depends on the thickness of metal, but ideally it should not be less then 1/__” or more than 1/_”.
1/16”
1/8”
Make the first pull a _______ pull.
Multiple
_________ cuts across most of the major load bearing paths in a car.
Clipping
A-pillars should be sectioned near the _______.
Middle
Cold stress relieving involves the use of ______ hammering.
Spring
Most unibody repairs demand ________ pulls at once.
Multiple
Once primers are opened they only have a shelf life of about _ week
1 week
Prepare the roof panel assembly and vehicle body with offset butt joints at the _-pillars, butt joint with insert or combination butt with lap joint at the _-pillar and offset lap joints at the _-pillars.
A pillar
B pillar
C pillar
A _______ gauge attached to your pulling equipment can be very useful in monitoring the pulling process.
pressure
A BOF vehicle can usually be straightened and realigned with a series of ______-_______ pulls.
Single-direction
A high speed ________ wheel can be used to seperate spot welded panels. Use this technique when the weld is not visible with a drill.
Grinding
Use the ____ saw type of cutter when the replacement panel is on top.
Hole saw type
Make the pulls a _____ at a time, _____ the stress, always take a __________.
Little
Relieve
Measurements
Stress relieving is necessary to help control _________.
Springback
You will deal with 3 general types of primary structural components
1
2
3
Closed sections
Hat channels
Single-layer flat components
Multiple or multi-directional pulls are used to repair _____ vehicles.
Unibody
You need to realign the grain of the metal to what it was before the collision. This is called _____ relieving.
Stress
All continuous welds must be made in increments of 13 mm to 19 mm (1/2” to 3/4”) maximum. This is known as _____ welding.
Stitch
An example of a bench system is the _______.
Celette
The MVSS states that when a vehicle with no passenger air bags is involved in a frontal collision of 48 km/hr, __ % of the front windshield be retained in the body opening. For vehicles with airbags no less than __% be retained.
75%
50%
_____ hardness is the firmness of a material or its ability to flex.
Shore hardness
Ensure the ___ level is topped up before using the pump.
Oil
The most effective way to perform the pull procedure is to approach the operation as though it is done with your ____ hands.
Bare
Use a ___ grinder when the weld is not accessible or if removing an existing MIG weld.
Die Grinder
Glass is considered structural if it is installed with polyurethane _______.
Adhesive
Follow a _______ plan to correct collision damage.
Repair
When sectioning a floor pan, whenever possible section on top of a _____ member.
Cross member
Ensure couplers are ______ to each other and never force couplers to mate to each other.
Matched
There are two types of anchoring systems for unibodies,
1.
2.
Pinch weld clamps
Mechanical or suspension mounts
Installation temperatures should not be less than _ C
4 C
When sectioning, the three basic types of weld joints recommended are the:
1
2
3
Butt joint with insert
Offset butt
Lap joint
The two types of cutting bits are
1
2
Drill type
Hole saw type
_______-pull systems allow the hold and pull or bi-directional pull capability that is often required in correcting secondary damage in unibody vehicles.
Secondary-pull
The damage correction sequence is
1.
2.
3.
Length
Width
Height
What is the grade of chain typically used for pulling chains?
Grade 80 Alloy
Sectioning refers to the procedure of panel replacement at somewhere other than a _______ joint.
Factory
Floor systems are among the most popular systems. An example of a floor system is the ______ ____ system.
Wedge Clamp
If there are no known manufacturer procedures for sectioning, replace the component at _______ seams.
Factory
Rack systems were heavily favored in the past and can still be found in many shops. An example of a rack system is the _____ or ___-_-____.
Chief
Car-O-Liner
DOT Department of ___________.
Transportation
Under no circumstances, can the pulling force exceed the ________ force.
Anchoring
The three main types of pumps used in straightening equipment are:
1.
2.
3.
Manual Hand Pumps
Electric over hydraulic
Air over hydraulic
___ primer is necessary for the adhesion of polyurethane to some plastic or rubber materials .
PVC Primer
Some manufacturers recommend that __ to __% of the vehicle weight be left on the wheels when the vehicle is anchored.
40 to 60%
The ____ hugger is the fastest means of making an anchor on vehicles with large holes in the bottom of the frame.
Hole Hugger
The damage that occurred last during the accident should be corrected _____.
First
At least ____ anchors are required for unibody vehicles.
Four
Metals consists of a structure of building blocks called _____.
Grains
Glass manufacturers place their logo and other identifying information on the _______ of the glass.
Bottom
The black band around the windshield is known as the ___.
Frit
Use a ______ bit type of cutter when the replacement panel is on top, when the panel is thick, where nuggets are large and where the weld shape is destroyed.
Large drill
The MVSS are standards for ________ and their ability to bond.
Adhesion
In unibody repair your have a two-fold job: to return your vehicle to its pre-accident ____ and to its pre-accident ____.
Shape
State
Welding should be performed with a MIG welder equipped with 0.mm (0.023”) diameter wire that meets American Welding Society Standard AWS-E-70S-
0.6
AWS-E-70S-6
Leave a _mm thick layer of urethane on the pinch weld.
2mm
Before any upper body structure is straightened, the ________ dimensions for length, width and height must first be corrected.
underbody
The overall pulling sequences should be ___-_____.
Pre-planned
Pinch weld clamps should be placed on the _____ panels to ensure they are in the torque box area.
Rocker
The two types of couplers are
1.
2.
Threaded and screw type
Quick connect
Do not grind into the steel panel and do not heat the panel so that it turns ____ or begins to warp.
Blue
An insert should be _____ the width of the cross section.
twice
_____ dimensions are always established first.
Length
Hydraulic rams are classified by their ______ and the capacity they are pushing, pulling or spreading.
Length
Floor pans use an _______ joint when sectioning. Lap the section over the panel at least _”
Overlap Joint
2”
Use a _____ drill bit type of cutter when the replacement panel is between other panels and welding cannot be accomplished from the backside.
Small type
Most frame equipment manufacturers have designed universal __-___ systems to aid in tying down BOF vehicles.
Tie-down
Depending upon the make and model, the rocker panels will be either _ or _ layers
2 or 3
Stress relieving must be done periodically during the pull. Pull, ____ relieve, measure and ___ again.
Stress
Pull
Adhesives usually have a shelf life of _ months
6 months
A _____-pull system is capable of making a single, very directional pull on the damaged area of the vehicle. These systems are effective on ____-type vehicles.
Single-pull
BOF
Always make your first ____ before trimming away the damaged metal.
Pulls
Often _______ must be used in conjunction with anchors to make them work properly.
Blocking
