ASE A4 Practice Test.
Free practice exam — 61 verified questions, instant feedback.

Answer: A
Four-wheel steering systems use a dedicated rear actuator commanded by a control module to turn the rear wheels opposite the front at low speed for a tighter turning radius; if that function is absent, the fault lies in the rear actuator or its controlling module rather than in unrelated front suspension components.

Answer: C
Parking-lot steering effort depends heavily on pump output at idle-range RPM, so a worn pump with reduced flow struggles most at low speed and improves as RPM rises, while a blown shock, a caster setting, or a stuck caliper do not selectively affect steering effort only at low speed.

Answer: A
Because the upper strut mount is the pivot point the strut rotates against during steering and the load path the body rides on over bumps, excessive play there produces both a knock on bumps and a vague, wandering feel through the steering wheel; it has no relationship to fuel economy, tire wear, or ride height, since it does not carry spring load.

Answer: B
Free play felt at the steering wheel before the road wheels respond can come from more than one worn component in the chain between the wheel and the tire: internal lash in a worn steering gear is a documented cause, and worn tie-rod ends add their own slack in the linkage that connects the gear output to the wheels, so both technicians describe valid causes; isolating which one is responsible requires checking the gear and each linkage joint separately for movement.

Answer: A
Holding the wheel at full lock routes all pump output across the relief valve, so if fluid is low or has entrained air the pump cavitates and produces a groaning or whining sound; a seized joint would bind rather than make hydraulic noise, and the camber and bushing items listed have no connection to pump sound.

Answer: C
When alignment angles are confirmed correct but the vehicle still wanders, the next logical step is to check for mechanical looseness anywhere in the steering system that would not show up on an alignment reading, such as worn tie rods, a loose center link, or a loose gearbox mount, since these allow the wheels to move independently of steering wheel input.

Answer: A
On-center dead spot in a recirculating-ball gear is a classic symptom of excessive lash between the sector gear and the ball nut teeth at the centered position, and the gear has a dedicated screw for that mesh; worm bearing preload affects rotational drag rather than centered lash, and tire pressure or stabilizer links have no bearing on internal gear lash.

Answer: A
Memory steer occurs when added friction somewhere in the steering system, commonly a binding upper strut bearing or a tight steering shaft coupling, prevents the wheels from self-centering under normal return force after a turn; a bent rim causes vibration rather than a directional memory, and oil pressure is unrelated to steering return.

Answer: C
A pull that appears only under braking and not while driving straight points to unequal braking force between the two front wheels, most commonly from a caliper that is not sliding freely and drags or applies unevenly; a worn pitman arm would cause play or wander at all times, and the other listed items do not produce a braking-specific pull.

Answer: C
An off-center wheel with straight tracking almost always means overall toe is correct but was not centered evenly between the two tie rods; lengthening one tie rod and shortening the other by equal amounts recenters the wheel without changing total toe, while replacing the gear or struts would not correct a simple centering issue.

Answer: A
A physical check of the steering shaft couplings while someone cycles the wheel lets the technician directly feel for play, binding, or a clunk at each joint, which is the most direct way to isolate a shaft-related noise; tread depth and fluid color are unrelated to a mechanical joint noise, and a highway-speed test would not reproduce a low-speed turning noise.

Answer: C
The steering knuckle physically locates both the suspension mounting point that establishes camber and the steering arm that establishes turning geometry, so a bend in the knuckle can throw off both angles at once in ways that ordinary shim or slot adjustments cannot fully compensate for, making both statements accurate.

Answer: B
Variable-ratio steering racks are intentionally cut with a non-constant tooth pitch so the effective steering ratio quickens near the ends of travel, giving easier parking maneuvers while keeping a slower, more stable ratio near center for highway driving; this is a by-design characteristic and has no relationship to brake type.

Answer: C
A worn strut mount bearing can absolutely produce a knocking noise as the strut shaft shifts against the mount over bumps, so limiting the possible cause to only a bent rim is too restrictive and ignores this well-known wear point, which makes the second claim incorrect while the first stands.

Answer: A
A sagged or broken coil spring reduces ride height on that corner and allows the suspension to travel deeper into its range before the bump stop, producing a harsher ride over bumps at that specific wheel; a stabilizer bar issue would affect side-to-side roll rather than one static corner, and opposite-corner tire pressure or a bent rim do not lower ride height.

Answer: C
Axle wrap occurs when acceleration torque tries to rotate the axle housing around the pinion, winding and unwinding the leaf springs; traction bars and properly designed spring and shackle geometry are built specifically to resist that rotational torque reaction, while a sway bar controls side-to-side roll, and strut mounts or tie rods are steering-related components with no role in rear axle torque control.

Answer: B
Worn control arm bushings allow the arm to shift under acceleration and braking loads, producing a clunk, and that same play also allows the arm's position to drift enough to shift caster and toe even though the bushing itself is not an adjustment point, so the second claim understates a real and well-documented effect on alignment angles.

Answer: C
A corner that sags at rest while the compressor cycles frequently trying to restore height is the classic signature of an air leak in that corner's air spring or strut, since the system is actively working to compensate for lost air; a stuck relay would prevent the compressor from running at all, and a sensor fault alone would not cause the physical sag with active compressor cycling.

Answer: A
The test result shows the bar's effect appears specifically during cornering and not during straight-line vertical bump travel, which confirms its role is to transfer suspension movement between the left and right sides to resist body roll rather than to control ride height or independently dampen vertical motion at each wheel.

Answer: B
Adaptive damper systems adjust valving electronically in real time to change ride firmness based on driving conditions, but they still work in conjunction with conventional coil springs, air springs, or torsion bars to support vehicle weight, so the claim that springs are eliminated entirely is incorrect.

Answer: D
A load-carrying ball joint must be unloaded before its internal wear can be measured accurately, because checking it while it still bears vehicle weight masks play that only shows up once the load is removed; the proper procedure is to support the vehicle so the joint is unloaded and then measure axial and radial movement with a dial indicator against the manufacturer's specification.

Answer: D
A worn end link introduces play in the connection between the sway bar and the suspension, producing a rattle or clunk over bumps and reducing how effectively the bar resists body roll in turns, but since the end link does not carry vehicle weight it has no effect on static ride height, tire wear pattern, or brake-specific pull.

Answer: B
A panhard rod or watts link is mounted transversely between the axle and the body specifically to keep the solid axle centered side-to-side under cornering loads, since coil or leaf springs alone provide little lateral control; fore-aft location is instead handled by trailing arms or leaf springs, and this component neither adjusts ride height nor dampens vertical motion.

Answer: B
A coil-over strut installation requires confirming the spring is fully and evenly seated in its perches with correct compression before the fasteners are torqued to specification, and because the strut's mounting position influences camber and caster, an alignment check afterward is standard practice rather than optional; tire pressure and brake fluid are unrelated to whether the strut was installed correctly.

Answer: D
A torsion bar's adjusting bolt changes the preload twist on the bar, which raises or lowers that corner's ride height without swapping the bar itself, and because ride height changes shift the control arm angle, an aggressive adjustment can also alter caster and give the vehicle a nose-up or nose-down attitude, so both statements hold true.

Answer: C
A strut with a leaking shaft seal is a sealed, non-serviceable hydraulic unit that has lost its damping fluid and cannot be topped off or repaired at the seal, so it must be replaced as a complete assembly, and because struts wear at similar rates, replacing both sides together is commonly recommended to keep damping balanced; increasing tire pressure does not address lost damping.

Answer: B
Feathered edges that feel smooth one direction and sharp the other are the signature wear pattern of a tire that has been scrubbing sideways as it rolls, which happens when toe is out of specification; camber wear instead concentrates on one flat edge rather than feathering the tread blocks, and worn shocks or incorrect pressure produce different wear signatures such as cupping or center/edge wear.

Answer: D
Positive caster creates a self-centering force that resists the wheel turning away from straight ahead, so the side with less positive caster offers less resistance to turning and the vehicle drifts toward that side; the vehicle does not pull toward the stronger-centering side, and cross caster is a well-known cause of pull, not just a wear issue.

Answer: D
Included angle is calculated by adding SAI and camber together, and comparing that sum to specification helps distinguish a bent spindle or strut assembly, which shifts the included angle, from an adjustable camber setting that is simply out of position, since only the former changes the strut's own geometry rather than just its mounting angle; toe, tire pressure, and spring rate are unrelated to this calculation.

Answer: C
The steering arm's angle relative to the knuckle establishes the Ackermann geometry that produces toe-out on turns, so a bent steering arm directly changes the turning radius reading on that side; worn shocks, low tire pressure, and a weak spring affect ride and damping but have no bearing on the fixed geometric relationship that produces toe-out on turns.

Answer: A
Dog-tracking occurs when the rear axle is aimed away from the vehicle centerline even though each wheel's individual toe, caster, and camber measure correctly, which is exactly what thrust angle measures; SAI, included angle, and turning radius describe front-wheel steering geometry and would not explain a rear-axle aiming problem.

Answer: D
Setback specifically measures whether one front wheel sits farther forward or back than the other along the vehicle's length, and a measurable setback usually points to a bent frame rail, subframe, or cradle, often from collision impact, rather than to tire pressure, bearing wear, or a simple ride height issue, none of which shift a wheel's fore-aft mounting position.

Answer: D
Camber, caster, and toe are all determined in part by the angle of the control arms and strut relative to the road surface, and lowering the ride height changes those angles through their arc of travel even without touching an adjuster, which is why camber and toe shift as a side effect of a lowering job; tire pressure, spring aging, and legal requirements are unrelated to this geometric relationship.

Answer: C
Rear thrust angle and setback describe how the rear axle and wheel positions relate to the vehicle's structural centerline, making them the most sensitive indicators of frame or subframe misalignment introduced during a collision repair; front camber or toe alone reflect front suspension adjustment rather than overall structural alignment, and tire pressure has no relationship to structural geometry.

Answer: B
Lengthening one tie rod while shortening the other by the same amount shifts the steering wheel's centered position without changing the overall toe value, which corrects a tilted wheel while keeping the alignment reading accurate; leaving it uncorrected ignores a legitimate customer complaint, and replacing the wheel or adjusting camber would not address a toe-centering issue.

Answer: A
Positive caster's self-centering effect raises low-speed steering effort while improving straight-line stability at speed, which is accurate, but the angles primarily responsible for abnormal tread wear are camber and toe, not caster, so attributing tread wear mainly to caster overstates its role and makes the second statement incorrect.

Answer: A
Ride height determines where the control arms and strut sit within their arc of travel, and because camber and caster are direct functions of that arm angle, a low ride height shifts both readings; tire pressure, wheel bearing preload, and brake pad thickness are unrelated mechanical measurements with no geometric connection to ride height.

Answer: B
Because included angle combines SAI and camber, a strut or spindle that is physically bent will show an included angle reading outside specification even when SAI on its own reads normal, which distinguishes a bent component from a camber setting that is simply out of adjustment; tire pressure, toe, and ride height are separate measurements that do not test the strut's own geometry.

Answer: B
A curb strike can bend a steering arm, control arm, strut, or wheel in addition to damaging tie rods, so limiting the check to toe alone risks missing damage that a full four-wheel alignment reading would reveal, including camber, caster, thrust angle, and setback; tire pressure and a rear-toe-only check would not catch this kind of impact damage.

Answer: B
Wheel and tire imbalance produces vibration that is a function of rotational speed and is largely unaffected by drive torque, so a vibration that changes noticeably between coasting and powered driving at the same speed points instead to a driveline component like a CV joint or driveshaft that only transmits torque under power; tire pressure alone would not create this load-dependent change.

Answer: C
Cupping occurs when a tire loses consistent contact with the road because the suspension is no longer damping vertical motion effectively, letting the tire bounce slightly as it rotates and wear in scalloped high and low spots; incorrect toe and camber instead produce feathered or edge-concentrated wear, and underinflation typically wears both shoulders rather than creating cupped spots.

Answer: B
When measured tire pressures are correct but the TPMS warning remains on, the system itself is the likely source of the fault, whether from a failed sensor or one that needs to be relearned to the vehicle after a tire was dismounted and remounted; alignment, tread depth, and balance are unrelated to why a pressure warning would stay illuminated with correct pressures present.

Answer: B
A wheel and tire assembly that still needs excessive weight after being cleaned and remounted often has a mechanical runout problem, such as a bent wheel or an out-of-round tire, that a balancer cannot fully correct with added weight, since weight corrects mass imbalance rather than physical runout; tire pressure, brake pad wear, and lug torque do not affect how much balance weight is needed.

Answer: C
Uneven side-to-side tire wear with correct pressure suggests one side has been running at a different camber or caster than the other, and before simply re-adjusting to specification the technician should confirm whether the difference is a bent component rather than a normal adjustment drift, since a bent part will pull back out of spec after adjustment; rear pressure, brake fluid, and oil level have no bearing on a front alignment-related pull.

Answer: B
Insufficient clamping force allows the wheel to shift microscopically against the hub during driving, and this repeated movement progressively enlarges the bolt holes, damages the studs, and can ultimately allow the wheel to separate from the vehicle; under-torqued lug nuts have no beneficial effect on fuel economy, ride quality, or tire pressure.

Answer: C
Changing wheel offset shifts the tire's contact patch relative to the steering axis and hub, which alters scrub radius and changes the leverage and loading placed on the wheel bearing; this can noticeably change steering feel and accelerate bearing wear, so treating an offset change as purely cosmetic or without handling impact overlooks a real engineering consequence.

Answer: D
A steering damper on a solid front axle is a sealed hydraulic unit that dampens shock transmitted through the linkage, but because it is sealed and non-serviceable it cannot be topped off or adjusted; a leaking damper must be replaced as a whole assembly, which makes the second claim incorrect.

Answer: A
Negative camber tilts the top of the tire inward, concentrating the tire's contact patch and wear toward the inside edge; positive camber would instead wear the outside edge, incorrect toe typically produces feathered diagonal wear rather than a clean edge, and tire pressure alone produces center or edge-to-edge wear rather than the sharply localized inside-edge pattern described.

Answer: A
Thrust angle describes which way the rear axle is aimed relative to the vehicle's geometric centerline and affects tracking and steering wheel centering on any vehicle with an independent or solid rear axle, front-wheel drive included, so restricting its relevance to only rear-wheel-drive vehicles is incorrect while the description of thrust angle itself is accurate.

Answer: A
Electric power steering systems are designed so that when the control module detects a fault outside acceptable parameters it de-energizes the assist motor and defaults to unassisted mechanical steering that the driver can still turn; a seized rack or failed joint would prevent turning entirely rather than only removing assist, and tire pressure cannot disable an electric assist system.

Answer: B
An idler arm supports one end of the center link in a parallelogram steering system, so wear there allows that end to droop and shifts the geometry connected to the tie rods on that side, changing toe; the claim that the idler arm has no bearing on wheel angles ignores this well-documented effect and is incorrect.

Answer: A
Air introduced during a rack replacement must be purged by cycling the steering through its full range with the engine off and then rechecking fluid level with the engine running, since foaming and a dropping reservoir level are classic signs of trapped air rather than a belt or alignment issue; skipping this step can leave persistent noise and inconsistent assist.

Answer: B
The inner tie-rod boot seals grease at the ball-socket joint connecting the tie rod to the rack; once torn, road grime and moisture enter and the washed-out lubricant leads to accelerated wear and eventual joint failure, while it has no direct effect on hydraulic pressure, tread wear rate, or camber angle.

Answer: C
Torque steer on front-wheel-drive vehicles is commonly linked to unequal half-shaft geometry between the two drive wheels, which causes uneven torque reaction and steering pull specifically under acceleration and disappears when coasting because there is no drive torque; a steering damper, rear tire pressure, or a column bearing would not produce an acceleration-only pull.

Answer: A
A properly damped suspension should settle after one or two oscillations once released; continued bouncing means the shock or strut is no longer converting spring motion into heat efficiently and has lost damping ability, while tire pressure and camber setting do not control how quickly body oscillation settles after a bump.

Answer: B
A spring will continue to oscillate after a disturbance unless a shock absorber converts that motion into heat and dissipates it; when the shocks are worn, the spring's natural bounce continues for several cycles instead of settling quickly, while tire pressure, caster, and a bent rim do not control how many times the body oscillates after a bump.

Answer: A
A torque arm is mounted to resist the axle housing's tendency to rotate around the pinion under drive and brake torque, keeping the pinion angle and driveline geometry stable; controlling side-to-side movement is instead the job of a panhard rod or watts link, and the torque arm plays no role in fuel tank support or ride height adjustment.

Answer: C
A broken or sagged spring on one side is one of the most common causes of uneven ride height, so the claim that it cannot happen is incorrect, and tire pressure differences alone would produce only a very small, largely cosmetic change compared to a broken spring, so treating pressure as the only possible cause is also incorrect, making both statements wrong.

Answer: D
Toe can be set to the correct total value while the steering wheel sits at an odd angle if the wheel was not held straight during the adjustment, because the alignment machine measures wheel angle relative to the vehicle, not the position of the steering wheel spokes; this has no bearing on camber, tire pressure, or ride height, which are independent measurements.

Answer: B
Excessive toe-in causes the front tires to scrub outward as they roll down the road, wearing the tread blocks into a feathered pattern that drags toward the outside edge and feels sharp when rubbed from outside to inside; center-only wear points to overinflation, cupping points to worn shocks, and a clean inside-edge-only pattern without feathering points to camber rather than toe.

Answer: D
Radial runout is checked by placing a dial indicator against the tread face of a raised, spinning wheel to measure how round the assembly is, and lateral runout is checked the same way but with the indicator against the sidewall to measure side-to-side wobble, so both descriptions of the correct measurement method are accurate.