ASE T5 LATEST 2026 COMPREHENSIVE QUESTIONS AND
SOLUTIONS GUARANTEE A+
✔✔The unitized wheel end may be described as:
Easily identifiable by the two distinct star shapes embossed on the center of its
hubcaps.
An enclosed unit with bearings that will need to be serviced every 100,000 miles
An enclosed unit with bearings that will need to be serviced every 500,000 miles.
An enclosed unit with bearings lubricated for the life of the hub, bearing, and seal
assembly - ✔✔Answer A is incorrect. The embossed shapes on the hubcaps are half
moon shapes.
Answer B is incorrect. Unitized wheel end components are not serviceable. If a failure
occurs, the hub assembly will need to be replaced
Answer C is incorrect. Unitized wheel ends are an enclosed unit with bearings
lubricated for the life of the hub, bearing, and seal assembly.
Answer D is correct. Unitized wheel ends are designed for the bearings to run the life of
the hub. Periodic inspections should be performed to ensure smooth operation.
✔✔41. A truck that is equipped with an air suspension system has one side rising after
unloading. Technician A says that this could be caused by a malfunctioning leveling
valve. Technician B says that this could be caused by a plugged exhaust port. Who is
correct?
A only
B only
Both A and B
Neither A nor B - ✔✔Answer A is incorrect. Technician B is also correct.
Answer B is incorrect. Technician A is also correct.
Answer C is correct. Both Technicians are correct. An air suspension system that has
one side rising after unloading can be caused by a malfunctioning leveling valve or a
plugged exhaust port. On a system with dual leveling valves, if one valve is not adjusted
properly, this condition may occur. Also, if an exhaust port is plugged, air pressure in
the bag will not exhaust and this condition will occur.
Answer D is incorrect. Both Technicians are correct.
✔✔All of the following can cause hard steering EXCEPT:
A dry fifth wheel.
An overloaded steer axle.
A contaminated power steering system.
Leaking shock absorbers. - ✔✔Answer A is incorrect. If the fifth wheel is dry the trailer
can't pivot properly. This erratic pivoting action would cause hard steering.
Answer B is incorrect. Overloading of the steering axle exerts excess pressures on the
steering components and tire /wheel assemblies. The result is hard steering.
Answer C is incorrect. Contaminants in the power steering system may adversely affect
the system operation, which would cause hard steering.
,Answer D is correct. Leaking shock absorbers would cause drivability issues such as
wheel hop but will not cause hard steering.
✔✔Two technicians are discussing air cab suspensions. Which of the following
statements is correct?
It has three springs.
It has a leveling valve.
It is used with rubber cab mounts.
It does not have shock absorbers. - ✔✔Answer A is incorrect. A cab air suspension
does not use springs.
Answer B is correct. It has a leveling valve. The leveling valve maintains the proper air
pressure in the air springs to provide the correct cab height. Some cab air suspension
systems have a single air spring and shock absorber.
Answer C is incorrect. A cab air suspension does not use rubber cab mounts.
Answer D is incorrect. A cab air suspension uses shock absorbers.
✔✔Technician A says a steer axle vibration or shimmy could be caused by steer tire or
whee issues. Technician B says replacing the front tires/wheels from another vehicle
with no vibration or shimmy is a viable diagnostic procedure. Who is correct?
A only
Bonly
Both A and B
Neither A nor B - ✔✔Answer A is incorrect. Technician B is also correct.
Answer B is incorrect. Technician A is also correct.
Answer C is correct. Both Technicians are correct. Steer axle vibration or shimmy could
be caused by steer tire or wheel issues, worn steering components, or worn suspension
components. Replacing the front tires/wheels from another vehicle with no vibration or
shimmy is a viable diagnostic procedure that would eliminate the tire/wheel assemblies
as a possible source.
Answer D is incorrect. Both Technicians are correct.
✔✔During a front axle assembly inspection, a technician should check for a twisted axle
beam if any of the following conditions exist EXCEPT:
The difference in caster angle exceeds 0.5 degrees from side to side.
The caster shims in place differ by 1 degree or more.
A low-speed shimmy exists, and there is no evidence of looseness elsewhere in the
steering system.
Excessive tire wear exists. - ✔✔Answer A is incorrect. The maximum difference from
side to side for caster is 0.5 degrees. Any reading over 0.5 degrees would indicate that
further inspection of the front axle is necessary to determine if the axle is twisted.
Answer B is incorrect. If the caster shims that are installed vary by 1 degree or more,
this would indicate that the axle may be twisted. The technician should never try to
correct a twisted axle by varying the caster shim thickness.
Answer C is incorrect. Low-speed shimmy with no evidence of looseness in the steering
components indicates that the front axle might be twisted. Caster is designed into the
, front axle to improve steerability. If the axle is twisted, the caster angles are opposed to
each other and would produce this symptom.
Answer D is correct. Caster is a non-tire-wearing angle, so a twisted axle beam will not
cause excessive tire wear.
✔✔During a preventive maintenance inspection, the technician finds that one spring pin
will not take grease. The first thing the technician should do is:
A. Change the zerk fitting.
3. Remove the weight from the spring assembly.
C. Replace the spring pin and bushing.
p. Heat the spring eye. - ✔✔Answer A is incorrect. The first thing that should be done is
to remove the weight from the spring assembly and try to grease the assembly in a
static position. If the technician is still unable to grease the assembly, then the zerk
fitting should be removed and the grease passage in the pin inspected.
Answer B is correct. Any time the suspension system is being greased, the spring
assemblies should be placed in a static position. This will allow for grease to flow
around the spring pins.
Answer C is incorrect. This would be the last resort.
Answer D is incorrect. You should never heat the spring eyes. This might change the
temper in the steel allowing to bending or breakage.
✔✔Technician A says that before checking the And level in the power steering
reservoir, you should turn the steering wheel slowly and completely from side to side
several times to boost the fluid temperature. Technician B says that foaming in the
reservoir indicates low fluid level or air in the system. Who is correct?
A only
B only
Both A and B
Neither A nor B - ✔✔Answer A is incorrect. Technician B is also correct.
Answer B is incorrect. Technician A is also correct.
Answer C is correct. Both Technicians are correct. The fluid temp should be above
175°F before checking the fluid level. The temperature should be raised by turning the
steering wheel completely from side to side. In addition, foaming in the oil is an
indication that there is air in the system and the fluid is aerated. This may lead to
overheating and components damage if not repaired.
Answer D is incorrect. Both Technicians are correct.
✔✔Kingpin inclination (KPI) may be defined as:
The forward or rearward tilt of the kingpin at the top.
The tracking angle of the tires from a true straight-ahead track.
The inward or outward tilt of the top of the wheel when viewed from the front of the
vehicle.
The amount in degrees that the top of the kingpin inclines away from vertical as viewed
from the front of the vehicle. - ✔✔Answer A is incorrect. Caster is defined as the forward
or rearward tilt of the kingpin at the top.
SOLUTIONS GUARANTEE A+
✔✔The unitized wheel end may be described as:
Easily identifiable by the two distinct star shapes embossed on the center of its
hubcaps.
An enclosed unit with bearings that will need to be serviced every 100,000 miles
An enclosed unit with bearings that will need to be serviced every 500,000 miles.
An enclosed unit with bearings lubricated for the life of the hub, bearing, and seal
assembly - ✔✔Answer A is incorrect. The embossed shapes on the hubcaps are half
moon shapes.
Answer B is incorrect. Unitized wheel end components are not serviceable. If a failure
occurs, the hub assembly will need to be replaced
Answer C is incorrect. Unitized wheel ends are an enclosed unit with bearings
lubricated for the life of the hub, bearing, and seal assembly.
Answer D is correct. Unitized wheel ends are designed for the bearings to run the life of
the hub. Periodic inspections should be performed to ensure smooth operation.
✔✔41. A truck that is equipped with an air suspension system has one side rising after
unloading. Technician A says that this could be caused by a malfunctioning leveling
valve. Technician B says that this could be caused by a plugged exhaust port. Who is
correct?
A only
B only
Both A and B
Neither A nor B - ✔✔Answer A is incorrect. Technician B is also correct.
Answer B is incorrect. Technician A is also correct.
Answer C is correct. Both Technicians are correct. An air suspension system that has
one side rising after unloading can be caused by a malfunctioning leveling valve or a
plugged exhaust port. On a system with dual leveling valves, if one valve is not adjusted
properly, this condition may occur. Also, if an exhaust port is plugged, air pressure in
the bag will not exhaust and this condition will occur.
Answer D is incorrect. Both Technicians are correct.
✔✔All of the following can cause hard steering EXCEPT:
A dry fifth wheel.
An overloaded steer axle.
A contaminated power steering system.
Leaking shock absorbers. - ✔✔Answer A is incorrect. If the fifth wheel is dry the trailer
can't pivot properly. This erratic pivoting action would cause hard steering.
Answer B is incorrect. Overloading of the steering axle exerts excess pressures on the
steering components and tire /wheel assemblies. The result is hard steering.
Answer C is incorrect. Contaminants in the power steering system may adversely affect
the system operation, which would cause hard steering.
,Answer D is correct. Leaking shock absorbers would cause drivability issues such as
wheel hop but will not cause hard steering.
✔✔Two technicians are discussing air cab suspensions. Which of the following
statements is correct?
It has three springs.
It has a leveling valve.
It is used with rubber cab mounts.
It does not have shock absorbers. - ✔✔Answer A is incorrect. A cab air suspension
does not use springs.
Answer B is correct. It has a leveling valve. The leveling valve maintains the proper air
pressure in the air springs to provide the correct cab height. Some cab air suspension
systems have a single air spring and shock absorber.
Answer C is incorrect. A cab air suspension does not use rubber cab mounts.
Answer D is incorrect. A cab air suspension uses shock absorbers.
✔✔Technician A says a steer axle vibration or shimmy could be caused by steer tire or
whee issues. Technician B says replacing the front tires/wheels from another vehicle
with no vibration or shimmy is a viable diagnostic procedure. Who is correct?
A only
Bonly
Both A and B
Neither A nor B - ✔✔Answer A is incorrect. Technician B is also correct.
Answer B is incorrect. Technician A is also correct.
Answer C is correct. Both Technicians are correct. Steer axle vibration or shimmy could
be caused by steer tire or wheel issues, worn steering components, or worn suspension
components. Replacing the front tires/wheels from another vehicle with no vibration or
shimmy is a viable diagnostic procedure that would eliminate the tire/wheel assemblies
as a possible source.
Answer D is incorrect. Both Technicians are correct.
✔✔During a front axle assembly inspection, a technician should check for a twisted axle
beam if any of the following conditions exist EXCEPT:
The difference in caster angle exceeds 0.5 degrees from side to side.
The caster shims in place differ by 1 degree or more.
A low-speed shimmy exists, and there is no evidence of looseness elsewhere in the
steering system.
Excessive tire wear exists. - ✔✔Answer A is incorrect. The maximum difference from
side to side for caster is 0.5 degrees. Any reading over 0.5 degrees would indicate that
further inspection of the front axle is necessary to determine if the axle is twisted.
Answer B is incorrect. If the caster shims that are installed vary by 1 degree or more,
this would indicate that the axle may be twisted. The technician should never try to
correct a twisted axle by varying the caster shim thickness.
Answer C is incorrect. Low-speed shimmy with no evidence of looseness in the steering
components indicates that the front axle might be twisted. Caster is designed into the
, front axle to improve steerability. If the axle is twisted, the caster angles are opposed to
each other and would produce this symptom.
Answer D is correct. Caster is a non-tire-wearing angle, so a twisted axle beam will not
cause excessive tire wear.
✔✔During a preventive maintenance inspection, the technician finds that one spring pin
will not take grease. The first thing the technician should do is:
A. Change the zerk fitting.
3. Remove the weight from the spring assembly.
C. Replace the spring pin and bushing.
p. Heat the spring eye. - ✔✔Answer A is incorrect. The first thing that should be done is
to remove the weight from the spring assembly and try to grease the assembly in a
static position. If the technician is still unable to grease the assembly, then the zerk
fitting should be removed and the grease passage in the pin inspected.
Answer B is correct. Any time the suspension system is being greased, the spring
assemblies should be placed in a static position. This will allow for grease to flow
around the spring pins.
Answer C is incorrect. This would be the last resort.
Answer D is incorrect. You should never heat the spring eyes. This might change the
temper in the steel allowing to bending or breakage.
✔✔Technician A says that before checking the And level in the power steering
reservoir, you should turn the steering wheel slowly and completely from side to side
several times to boost the fluid temperature. Technician B says that foaming in the
reservoir indicates low fluid level or air in the system. Who is correct?
A only
B only
Both A and B
Neither A nor B - ✔✔Answer A is incorrect. Technician B is also correct.
Answer B is incorrect. Technician A is also correct.
Answer C is correct. Both Technicians are correct. The fluid temp should be above
175°F before checking the fluid level. The temperature should be raised by turning the
steering wheel completely from side to side. In addition, foaming in the oil is an
indication that there is air in the system and the fluid is aerated. This may lead to
overheating and components damage if not repaired.
Answer D is incorrect. Both Technicians are correct.
✔✔Kingpin inclination (KPI) may be defined as:
The forward or rearward tilt of the kingpin at the top.
The tracking angle of the tires from a true straight-ahead track.
The inward or outward tilt of the top of the wheel when viewed from the front of the
vehicle.
The amount in degrees that the top of the kingpin inclines away from vertical as viewed
from the front of the vehicle. - ✔✔Answer A is incorrect. Caster is defined as the forward
or rearward tilt of the kingpin at the top.
