ASE T5 MASTER STUDY BANK 2026
250 PLUS Q AND A FULL
RATIONALES A PASS GUARANTEED
ASE T5: Suspension and Steering Practice Exam
1. A technician is inspecting a heavy-duty truck with a "wandering"
complaint. During a dry-park test, the technician observes that the
steering gear input shaft turns significantly before the pitman arm
moves. Which of the following is the most likely cause?
• A) Seized kingpins in the steer axle knuckles
• B) Excessive internal lash in the steering gear sector
shaft
• C) Worn universal joints in the steering column intermediate
shaft
• D) Improperly adjusted toe-in setting
• Rationale: When the input shaft moves without
corresponding movement in the output (sector) shaft, it
indicates internal clearance or "slop" within the steering
gear box itself, often requiring a sector shaft adjustment or
gear replacement.
2. A vehicle equipped with a constant-displacement hydraulic power
steering pump is experiencing high steering effort only when the
engine is at idle, but steering feels normal at highway speeds.
Technician A says the flow control valve in the pump may be stuck
open. Technician B says the pump may have internal wear causing
low volumetric efficiency. Who is right?
• A) Technician A only
• B) Technician B only
• C) Both A and B
• D) Neither A nor B
, • Rationale: Internal pump wear (slippage) is most
noticeable at low RPM because the pump cannot generate
enough flow/pressure to overcome steering resistance. A
flow control valve stuck open would typically cause issues at
higher RPMs, not idle.
3. While performing a front-end alignment on a truck with a beam
axle, the technician finds that the camber is out of specification on
the right side. Which of the following is the correct method for
correcting this condition?
• A) Adding or removing shims between the spring pack and
the axle
• B) Adjusting the tie-rod ends to change the spindle angle
• C) Using a specialized heavy-duty cold-bending
machine to shape the axle
• D) Rotating the kingpin 180 degrees to offset the wear
• Rationale: On a solid beam axle, camber is non-adjustable
through traditional means like shims. It requires specialized
equipment to cold-bend the axle back to spec, or
replacement of the axle if the bend is too severe.
4. A driver reports that the truck pulls to the right during heavy
braking, but tracks straight during normal cruising. Which of the
following suspension or steering defects is most likely responsible
for this "brake steer"?
• A) A seized left-side shock absorber
• B) A broken center bolt in the right-side front leaf
spring pack
• C) Excessive positive caster on the right-side wheel
• D) Worn bushings in the rear torque arms
• Rationale: A broken center bolt allows the axle to shift
rearward on the spring during braking. If the right side
shifts back more than the left, it changes the steering
geometry and causes a hard pull to the side with the shift.
5. A technician is diagnosing a heavy-duty air suspension system
where the ride height is too low at all times, despite the air
, compressor functioning correctly. When the height control valve
(HCV) linkage is moved manually to the "up" position, no air flows
to the bellows. Which of the following is the most logical first step?
• A) Replace all air bellows as they likely have leaks
• B) Replace the height control valve assembly
• C) Check for a clogged or frozen pressure protection
valve (PPV)
• D) Adjust the linkage to increase the lever arm length
• Rationale: The pressure protection valve is designed to close
if system pressure drops too low, prioritizing the air brakes.
If it is clogged or failed, no air will reach the suspension
system, regardless of HCV position.
6. During a kingpin "knock" test, the technician measures 0.025
inches of lateral movement at the top of the tire. The
manufacturer’s maximum specification is 0.015 inches. Technician
A says the kingpin bushings are likely worn. Technician B says the
wheel bearings must be adjusted before condemning the kingpin
bushings. Who is right?
• A) Technician A only
• B) Technician B only
• C) Both A and B
• D) Neither A nor B
• Rationale: You must eliminate wheel bearing play before
measuring kingpin play. If the bearings are loose, they will
create lateral movement that mimics worn kingpins,
leading to a false diagnosis.
7. A truck is experiencing rapid, "cupping" type wear on the inside
edge of the front tires. Which of the following suspension
conditions is most likely to cause this specific tire wear pattern?
• A) Excessive toe-in adjustment
• B) Operating the vehicle in a consistently overloaded
condition
• C) Worn or leaking shock absorbers
, • D) Too much positive caster
• Rationale: Cupping is caused by the tire bouncing or
oscillating rather than maintaining steady contact with the
road. This is the primary symptom of failed shock absorbers
in a heavy-duty suspension.
8. When inspecting a Sheppard-style power steering gear, the
technician notes that the "poppet valves" are leaking externally.
What is the primary function of these poppets?
• A) To regulate maximum system pressure from the pump
• B) To reduce pressure at the end of the steering
stroke to prevent pump overheat and mechanical
stress
• C) To provide steering feel and feedback to the driver
• D) To act as a relief valve in case of a burst hydraulic hose
• Rationale: Poppets are designed to "trip" at the full turn
limits of the steering gear, bypassing fluid so the pump
doesn't continue to build high pressure against the
mechanical stops.
9. A technician is checking the "Ackermann Geometry" (toe-out on
turns) of a truck. The truck is found to have a scrub radius that
causes the tires to squeal during tight maneuvers in the yard.
Which component is responsible for maintaining correct toe-out
on turns?
• A) The drag link length
• B) The angle of the steering arms (knuckle arms)
• C) The pitman arm clocked position
• D) The front axle caster shims
• Rationale: Ackermann geometry is built into the angle of
the steering arms. If an arm is bent or if the wrong arm is
installed, the wheels will not follow their respective
different-radius paths during a turn.
10. A heavy-duty truck with a Walking Beam (Hendrickson) rear
suspension is exhibiting a "thumping" noise and a noticeable lean
250 PLUS Q AND A FULL
RATIONALES A PASS GUARANTEED
ASE T5: Suspension and Steering Practice Exam
1. A technician is inspecting a heavy-duty truck with a "wandering"
complaint. During a dry-park test, the technician observes that the
steering gear input shaft turns significantly before the pitman arm
moves. Which of the following is the most likely cause?
• A) Seized kingpins in the steer axle knuckles
• B) Excessive internal lash in the steering gear sector
shaft
• C) Worn universal joints in the steering column intermediate
shaft
• D) Improperly adjusted toe-in setting
• Rationale: When the input shaft moves without
corresponding movement in the output (sector) shaft, it
indicates internal clearance or "slop" within the steering
gear box itself, often requiring a sector shaft adjustment or
gear replacement.
2. A vehicle equipped with a constant-displacement hydraulic power
steering pump is experiencing high steering effort only when the
engine is at idle, but steering feels normal at highway speeds.
Technician A says the flow control valve in the pump may be stuck
open. Technician B says the pump may have internal wear causing
low volumetric efficiency. Who is right?
• A) Technician A only
• B) Technician B only
• C) Both A and B
• D) Neither A nor B
, • Rationale: Internal pump wear (slippage) is most
noticeable at low RPM because the pump cannot generate
enough flow/pressure to overcome steering resistance. A
flow control valve stuck open would typically cause issues at
higher RPMs, not idle.
3. While performing a front-end alignment on a truck with a beam
axle, the technician finds that the camber is out of specification on
the right side. Which of the following is the correct method for
correcting this condition?
• A) Adding or removing shims between the spring pack and
the axle
• B) Adjusting the tie-rod ends to change the spindle angle
• C) Using a specialized heavy-duty cold-bending
machine to shape the axle
• D) Rotating the kingpin 180 degrees to offset the wear
• Rationale: On a solid beam axle, camber is non-adjustable
through traditional means like shims. It requires specialized
equipment to cold-bend the axle back to spec, or
replacement of the axle if the bend is too severe.
4. A driver reports that the truck pulls to the right during heavy
braking, but tracks straight during normal cruising. Which of the
following suspension or steering defects is most likely responsible
for this "brake steer"?
• A) A seized left-side shock absorber
• B) A broken center bolt in the right-side front leaf
spring pack
• C) Excessive positive caster on the right-side wheel
• D) Worn bushings in the rear torque arms
• Rationale: A broken center bolt allows the axle to shift
rearward on the spring during braking. If the right side
shifts back more than the left, it changes the steering
geometry and causes a hard pull to the side with the shift.
5. A technician is diagnosing a heavy-duty air suspension system
where the ride height is too low at all times, despite the air
, compressor functioning correctly. When the height control valve
(HCV) linkage is moved manually to the "up" position, no air flows
to the bellows. Which of the following is the most logical first step?
• A) Replace all air bellows as they likely have leaks
• B) Replace the height control valve assembly
• C) Check for a clogged or frozen pressure protection
valve (PPV)
• D) Adjust the linkage to increase the lever arm length
• Rationale: The pressure protection valve is designed to close
if system pressure drops too low, prioritizing the air brakes.
If it is clogged or failed, no air will reach the suspension
system, regardless of HCV position.
6. During a kingpin "knock" test, the technician measures 0.025
inches of lateral movement at the top of the tire. The
manufacturer’s maximum specification is 0.015 inches. Technician
A says the kingpin bushings are likely worn. Technician B says the
wheel bearings must be adjusted before condemning the kingpin
bushings. Who is right?
• A) Technician A only
• B) Technician B only
• C) Both A and B
• D) Neither A nor B
• Rationale: You must eliminate wheel bearing play before
measuring kingpin play. If the bearings are loose, they will
create lateral movement that mimics worn kingpins,
leading to a false diagnosis.
7. A truck is experiencing rapid, "cupping" type wear on the inside
edge of the front tires. Which of the following suspension
conditions is most likely to cause this specific tire wear pattern?
• A) Excessive toe-in adjustment
• B) Operating the vehicle in a consistently overloaded
condition
• C) Worn or leaking shock absorbers
, • D) Too much positive caster
• Rationale: Cupping is caused by the tire bouncing or
oscillating rather than maintaining steady contact with the
road. This is the primary symptom of failed shock absorbers
in a heavy-duty suspension.
8. When inspecting a Sheppard-style power steering gear, the
technician notes that the "poppet valves" are leaking externally.
What is the primary function of these poppets?
• A) To regulate maximum system pressure from the pump
• B) To reduce pressure at the end of the steering
stroke to prevent pump overheat and mechanical
stress
• C) To provide steering feel and feedback to the driver
• D) To act as a relief valve in case of a burst hydraulic hose
• Rationale: Poppets are designed to "trip" at the full turn
limits of the steering gear, bypassing fluid so the pump
doesn't continue to build high pressure against the
mechanical stops.
9. A technician is checking the "Ackermann Geometry" (toe-out on
turns) of a truck. The truck is found to have a scrub radius that
causes the tires to squeal during tight maneuvers in the yard.
Which component is responsible for maintaining correct toe-out
on turns?
• A) The drag link length
• B) The angle of the steering arms (knuckle arms)
• C) The pitman arm clocked position
• D) The front axle caster shims
• Rationale: Ackermann geometry is built into the angle of
the steering arms. If an arm is bent or if the wrong arm is
installed, the wheels will not follow their respective
different-radius paths during a turn.
10. A heavy-duty truck with a Walking Beam (Hendrickson) rear
suspension is exhibiting a "thumping" noise and a noticeable lean
