ASE T5 Exam with 100% Correct Answers | 100%Verified |Latest 2025|2026
1. The correct answer is C, both technicians are right. Height control valves can
fail in either direction—that is, by controlling the height at too great a level or at
too low a level. If the truck leans, the cause can be either too great a height on one
side or too low a height on the other. Until the technician knows that one side is
too high or the other too low, he must assume that either valve might be
malfunctioning.
1. The truck with the air suspension system shown above leans to the right.
Technician A says that valve X could be the cause. Technician B says that valve Y
could be the cause. Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B
2. The correct answer is C, both technicians are right. Either a worn shackle
bushing or worn shock bushing can cause noise due to looseness when the truck
hits a good bump. If there is clearance between the rubber bushing and mounting
bolt, or if the rubber bushing has worn very thin, elongated or even broken and
fallen out, the result will be a clattering noise as the motion of the suspension
repeatedly takes up the clearance first in one direction and then in the other.
2. The driver of a truck says that he hears a clattering noise from the front axle
when driving on a rough road. Technician A says the cause could be worn shock
absorber mounting bushings. Technician B says the cause could be worn shackle
bushings. Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B
3. The correct answer is A. Correct caster is critically important in keeping tires at
the right angle and enabling the steering system to maintain directional stability.
Since the caster shims would have to be removed for this work to be done, it's quite
1
,logical to assume they might have been installed backwards, which would create
the critically incorrect caster setting that would make the truck wander severely.
3. The driver of a truck that has just had its front springs and hangers replaced says
that it is hard to keep the steering wheel in a straight-ahead position.
Technician A says the cause could be that the caster shims were installed
backwards. Technician B says the cause could be that the wrong spring hangers
were installed. Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B
4. The correct answer is B. The beam bushings maintain horizontal alignment of
the axles, especially on turns. When bushings are worn, the beam on either side can
move forward or backward, turning the axles in relation to the frame and causing
the type of misalignment that causes tire wear and steering problems.
4. The drive axles on a truck with a walking beam suspension are out of alignment
in a manner that is causing vehicle tire wear and steering instability.
Technician A says the cause could be that the torque rods are too long or too short.
Technician B says the cause could be worn walking beam bushings. Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B
5. The correct answer is B. Caster action is the most critical suspension alignment
specification in terms of affecting steering wheel return to the center. Caster
actually lifts the truck as the wheel is turned in either direction; when the driver
allows the wheel to return to center, the weight of the truck actually forces the
steering system to that position. When the caster setting is too high, the weight of
the truck exerts too much force in centering the steering and creates the symptoms
noted.
2
,5. The driver of a truck says that it is too hard to steer and that the steering wheel
return is too fast. Which of these is the most likely cause?
A. too much negative caster
B. too much positive caster
C. too much negative camber
D. too much positive camber
6. The correct answer is A. Excessive worm bearing preload would show up as
binding as the steering was turned to one extreme and the friction became
excessive due to the combination of normal load and too much preload. B is not
the answer because sticking U-joints should be apparent and cause rough rotation
of the wheel at all steering angles. If either lash or ball nut thrust adjustment was
incorrect, the box would either bind at the center or be too loose at the extremes of
travel.
6. A steering gear binds when turning to the left after it has been adjusted. The
most likely cause is that the:
A. worm bearing preload was set too high
B. steering shaft U-joints are sticking
C. gearbox was not centered when the lash was adjusted
D. recirculating ball nut thrust adjustment is off
7. The correct answer is B. Out-of-balance wheels cause a high frequency
vibration, which shows up in the wheel as shimmy. A is not the answer because
caster shows up as too much self-centering action (hard steering). Air in the power
steering system causes constantly or intermittently hard steering (lack of hydraulic
force). Low tire pressures generally do not cause an uneven force on the steering
system, but rather poor tread contact with the road and vague steering or hard
steering.
7. Which of these is most likely to cause steering wheel shimmy?
A. too much positive caster
B. out-of-balance wheels
C. air in the power steering system
3
, D. low tire pressure
8. The correct answer is C, both technicians are right. Steering columns are made
to be collapsible to prevent the column from seriously impacting the driver during
a front-end collision. If an accident has occurred, and the steering column has
partially col-lapsed, the entire column must be replaced.
8. Technician A says that steering columns are collapsible to prevent the column
from causing serious injury to the driver during a collision. Technician B says that
when a steering column has been col-lapsed, the entire column must be replaced.
Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B
9. The correct answer is A. Fluid passes through the power steering system parts at
high flow rates and under high pressures. When it becomes aerated, the bubbles
cause rough, uneven flow and consequent noise. When a relief valve sticks open,
fluid flows more smoothly (in a less restricted manner than normal), causing no
noise but poor power assist instead.
9. A constant buzzing noise comes from the power steering pump. Technician A
says the cause could be air in the system. Technician B says the cause could be that
the relief valve is stuck in the open position.
Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B
10. The correct answer is C, both technicians are right. The steering wheel must be
in the center position because clearances in the box change (they are tightest at
center) and setting preload at another position would cause binding at the center.
The drag link must be disconnected because preload is measured by turning the
4
1. The correct answer is C, both technicians are right. Height control valves can
fail in either direction—that is, by controlling the height at too great a level or at
too low a level. If the truck leans, the cause can be either too great a height on one
side or too low a height on the other. Until the technician knows that one side is
too high or the other too low, he must assume that either valve might be
malfunctioning.
1. The truck with the air suspension system shown above leans to the right.
Technician A says that valve X could be the cause. Technician B says that valve Y
could be the cause. Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B
2. The correct answer is C, both technicians are right. Either a worn shackle
bushing or worn shock bushing can cause noise due to looseness when the truck
hits a good bump. If there is clearance between the rubber bushing and mounting
bolt, or if the rubber bushing has worn very thin, elongated or even broken and
fallen out, the result will be a clattering noise as the motion of the suspension
repeatedly takes up the clearance first in one direction and then in the other.
2. The driver of a truck says that he hears a clattering noise from the front axle
when driving on a rough road. Technician A says the cause could be worn shock
absorber mounting bushings. Technician B says the cause could be worn shackle
bushings. Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B
3. The correct answer is A. Correct caster is critically important in keeping tires at
the right angle and enabling the steering system to maintain directional stability.
Since the caster shims would have to be removed for this work to be done, it's quite
1
,logical to assume they might have been installed backwards, which would create
the critically incorrect caster setting that would make the truck wander severely.
3. The driver of a truck that has just had its front springs and hangers replaced says
that it is hard to keep the steering wheel in a straight-ahead position.
Technician A says the cause could be that the caster shims were installed
backwards. Technician B says the cause could be that the wrong spring hangers
were installed. Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B
4. The correct answer is B. The beam bushings maintain horizontal alignment of
the axles, especially on turns. When bushings are worn, the beam on either side can
move forward or backward, turning the axles in relation to the frame and causing
the type of misalignment that causes tire wear and steering problems.
4. The drive axles on a truck with a walking beam suspension are out of alignment
in a manner that is causing vehicle tire wear and steering instability.
Technician A says the cause could be that the torque rods are too long or too short.
Technician B says the cause could be worn walking beam bushings. Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B
5. The correct answer is B. Caster action is the most critical suspension alignment
specification in terms of affecting steering wheel return to the center. Caster
actually lifts the truck as the wheel is turned in either direction; when the driver
allows the wheel to return to center, the weight of the truck actually forces the
steering system to that position. When the caster setting is too high, the weight of
the truck exerts too much force in centering the steering and creates the symptoms
noted.
2
,5. The driver of a truck says that it is too hard to steer and that the steering wheel
return is too fast. Which of these is the most likely cause?
A. too much negative caster
B. too much positive caster
C. too much negative camber
D. too much positive camber
6. The correct answer is A. Excessive worm bearing preload would show up as
binding as the steering was turned to one extreme and the friction became
excessive due to the combination of normal load and too much preload. B is not
the answer because sticking U-joints should be apparent and cause rough rotation
of the wheel at all steering angles. If either lash or ball nut thrust adjustment was
incorrect, the box would either bind at the center or be too loose at the extremes of
travel.
6. A steering gear binds when turning to the left after it has been adjusted. The
most likely cause is that the:
A. worm bearing preload was set too high
B. steering shaft U-joints are sticking
C. gearbox was not centered when the lash was adjusted
D. recirculating ball nut thrust adjustment is off
7. The correct answer is B. Out-of-balance wheels cause a high frequency
vibration, which shows up in the wheel as shimmy. A is not the answer because
caster shows up as too much self-centering action (hard steering). Air in the power
steering system causes constantly or intermittently hard steering (lack of hydraulic
force). Low tire pressures generally do not cause an uneven force on the steering
system, but rather poor tread contact with the road and vague steering or hard
steering.
7. Which of these is most likely to cause steering wheel shimmy?
A. too much positive caster
B. out-of-balance wheels
C. air in the power steering system
3
, D. low tire pressure
8. The correct answer is C, both technicians are right. Steering columns are made
to be collapsible to prevent the column from seriously impacting the driver during
a front-end collision. If an accident has occurred, and the steering column has
partially col-lapsed, the entire column must be replaced.
8. Technician A says that steering columns are collapsible to prevent the column
from causing serious injury to the driver during a collision. Technician B says that
when a steering column has been col-lapsed, the entire column must be replaced.
Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B
9. The correct answer is A. Fluid passes through the power steering system parts at
high flow rates and under high pressures. When it becomes aerated, the bubbles
cause rough, uneven flow and consequent noise. When a relief valve sticks open,
fluid flows more smoothly (in a less restricted manner than normal), causing no
noise but poor power assist instead.
9. A constant buzzing noise comes from the power steering pump. Technician A
says the cause could be air in the system. Technician B says the cause could be that
the relief valve is stuck in the open position.
Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B
10. The correct answer is C, both technicians are right. The steering wheel must be
in the center position because clearances in the box change (they are tightest at
center) and setting preload at another position would cause binding at the center.
The drag link must be disconnected because preload is measured by turning the
4
