Structural Analysis And Damage Repair
technician A says that the weight of the mechanical and drivetrain components must be taken
into account when measuring the unibody. Tech B says that some dimensional manuals provise
measurements for mechanicals out or compensated for. Who is right?
A. Tech A only
B. Tech B only
C. Both A & B
D. Neither - ANS-C
The weight of the mechanical and drivetrain components do need to be considered when
measuring a unibody and some information providers do provide mechanicals and engine out
specifications.
Tech A says that the datum plane is established by identifying the vehicle centerline. Tech B
says that width mesurements are made from the datum plane. who is right?
A.Tech A only
B. Tech B only
C. Both A & B
D.Neither - ANS-D
The datum plane is an imaginary plane under the vehicle from which height measurements are
made. Width measurements are made from the centerline of the vehicle.
Tech A says that there are two basic full frame designs. Tech B says that there are three rail
configurations. who is right?
A. Tech A
B. Tech B
C. Both A & B
D. Neither - ANS-C
There are two primary full frame designs, the ladder and perimeter. There are three basic full
frame rail configurations; open 'C' Channel, Closed 'C' Channel and Box frames.
While measuring a unibody vehicle it is discovered the left front rail is -111mm from specification
in width. Technician A says that the vehicle is swayed to the left. Tech B says that the vehicle is
in toward centerline. who is right?
A. Tech A
B. Tech B
C. Both
D. Neither - ANS-B
Width is calculated from the center out. So a value of -111mm on the left rail shows sway to the
right and in toward centerline.
, Tech A says that measurements that are the same on both sides of the vehicle are known as
asymmetrical. Tech B says that the dimension manual should be checked to see how
asymmetrical dimensions are noted. who is right?
A. Tech A
B. Tech B
C. Both
D. Neither - ANS-B
Asymmetrical measurements are different on opposite sides of the vehicle. Symmetrical
measurements are the same on both sides.
A unibody vehicle that was in a collision has been repaired. a four wheel alignment shows that
the car is tracking within manufacture specs, but a visual inspection of the car reveals some
misalignment with panels. could the unibody still be bent?
A. Yes
B. No
C. Only if the vehicle was involved in a front end collision.
D. Only if the vehicle was involved in a rear end collision. - ANS-A
A unibody can be seriously damaged and out of alignment in terms of factory specs. however, if
the control points and suspension mounting points are within the spec, the wheel alignment will
be normal. this does not mean the car is repaired properly, although the saftey of the car can
only be ascertained on an individual basis.
While replacing a rocker panel, it is discovered to have structural foam inside. Tech A says
replacing it with acoustical foam will serve the same purpose. Tech B says the foam must be
replaced according to OEM guidelines. Who is right?
A. Tech A
B. Tech B
C. Both
D. Neither - ANS-B
If structural foam is taken out it must be replaced with structural foam unless otherwise noted by
the vehicle manufacturer. Acoustical foam serves no structural purpose and is used to absorb
sound.
Tech A says that a full frame vehicle may have a unitized cab structure. Tech B says that full
frame construction is used on full size vans and pickup trucks. who is right?
A. tech A
B. tech B
C. both
D. neither - ANS-C
A full frame vehicle may have a unitized body structure. full frame construction is still being used
on vans and pickup trucks.
technician A says that the weight of the mechanical and drivetrain components must be taken
into account when measuring the unibody. Tech B says that some dimensional manuals provise
measurements for mechanicals out or compensated for. Who is right?
A. Tech A only
B. Tech B only
C. Both A & B
D. Neither - ANS-C
The weight of the mechanical and drivetrain components do need to be considered when
measuring a unibody and some information providers do provide mechanicals and engine out
specifications.
Tech A says that the datum plane is established by identifying the vehicle centerline. Tech B
says that width mesurements are made from the datum plane. who is right?
A.Tech A only
B. Tech B only
C. Both A & B
D.Neither - ANS-D
The datum plane is an imaginary plane under the vehicle from which height measurements are
made. Width measurements are made from the centerline of the vehicle.
Tech A says that there are two basic full frame designs. Tech B says that there are three rail
configurations. who is right?
A. Tech A
B. Tech B
C. Both A & B
D. Neither - ANS-C
There are two primary full frame designs, the ladder and perimeter. There are three basic full
frame rail configurations; open 'C' Channel, Closed 'C' Channel and Box frames.
While measuring a unibody vehicle it is discovered the left front rail is -111mm from specification
in width. Technician A says that the vehicle is swayed to the left. Tech B says that the vehicle is
in toward centerline. who is right?
A. Tech A
B. Tech B
C. Both
D. Neither - ANS-B
Width is calculated from the center out. So a value of -111mm on the left rail shows sway to the
right and in toward centerline.
, Tech A says that measurements that are the same on both sides of the vehicle are known as
asymmetrical. Tech B says that the dimension manual should be checked to see how
asymmetrical dimensions are noted. who is right?
A. Tech A
B. Tech B
C. Both
D. Neither - ANS-B
Asymmetrical measurements are different on opposite sides of the vehicle. Symmetrical
measurements are the same on both sides.
A unibody vehicle that was in a collision has been repaired. a four wheel alignment shows that
the car is tracking within manufacture specs, but a visual inspection of the car reveals some
misalignment with panels. could the unibody still be bent?
A. Yes
B. No
C. Only if the vehicle was involved in a front end collision.
D. Only if the vehicle was involved in a rear end collision. - ANS-A
A unibody can be seriously damaged and out of alignment in terms of factory specs. however, if
the control points and suspension mounting points are within the spec, the wheel alignment will
be normal. this does not mean the car is repaired properly, although the saftey of the car can
only be ascertained on an individual basis.
While replacing a rocker panel, it is discovered to have structural foam inside. Tech A says
replacing it with acoustical foam will serve the same purpose. Tech B says the foam must be
replaced according to OEM guidelines. Who is right?
A. Tech A
B. Tech B
C. Both
D. Neither - ANS-B
If structural foam is taken out it must be replaced with structural foam unless otherwise noted by
the vehicle manufacturer. Acoustical foam serves no structural purpose and is used to absorb
sound.
Tech A says that a full frame vehicle may have a unitized cab structure. Tech B says that full
frame construction is used on full size vans and pickup trucks. who is right?
A. tech A
B. tech B
C. both
D. neither - ANS-C
A full frame vehicle may have a unitized body structure. full frame construction is still being used
on vans and pickup trucks.
