ASE A4 Practice Test — Free Suspension & Steering Qs
Good A4 practice tests the way the real exam does: a complaint, a check, and one answer that survives the reasoning — not a vocabulary quiz. Below are worked A4 questions on steering pull, the loaded ball-joint check, and reading tire wear back to an alignment angle, each with the diagnostic rationale instead of just the letter, then free interactive practice. Study the A4 content first, then drill the area you miss.
Take the A4 practice test
Eight verified A4 questions in the real exam’s symptom-to-cause format. Answer one and the reasoning appears. No account, no email.
Real ASE-format questions with explained answers. Pick an answer and the reasoning appears — including why the tempting wrong choice fails. Nothing to sign up for.
- 1
Excessive toe (in or out) on the front axle MOST characteristically causes:
- 2
A power steering system is noisy and the fluid is foamy/aerated. Technician A says a low fluid level can cause aeration. Technician B says a loose or cracked suction (low-pressure) hose can draw in air. Who is correct?
- 3
A vehicle continues to bounce two or more times after being pushed down on one corner and released. This 'bounce test' result indicates:
- 4
A steering-wheel shimmy felt mainly at a specific highway speed that smooths out above and below it is MOST often caused by:
- 5
A tire that is worn more on one shoulder (one side of the tread) than the other is MOST characteristic of incorrect:
- 6
During a dry-park check, a technician rocks the steering wheel back and forth with the engine off and feels free play accompanied by a clunk at one front corner. The MOST likely cause is:
- 7
Technician A says a load-carrying ball joint should be checked for wear with the joint unloaded (weight off the joint, per the procedure). Technician B says a follower (non-load-carrying) ball joint is checked for any perceptible play. Who is correct?
- 8
Radial runout of a tire/wheel assembly refers to:
What the A4 practice should cover
A4 is a chassis diagnosis test. The detailed facts panel above this page lists the fee, recert window, and Master grouping; what matters for practice is where the questions live. Steering, suspension, and alignment each pull about a dozen scored questions, with a smaller wheels-and-tires area — so practice that ignores alignment math or never makes you separate two parts that cause the same noise is leaving a third of the test on the table.
- Approx. scored questions
- about 40
- Biggest areas
- Steering, Suspension, Alignment (~12 each)
- Smallest area
- Wheels & tires (~4)
- Counts toward
- Master Automobile (A1–A8)
Here is the full content breakdown the practice questions are built against — the same table on the A4 study guide:
| Content area | ~Q | What it covers |
|---|---|---|
| Steering Systems | ~12 | Steering columns, manual/power racks and gears, electric power steering and linkage. |
| Suspension Systems | ~12 | Springs, struts, shocks, control arms, ball joints, bushings and electronic suspension. |
| Wheel Alignment Diagnosis & Adjustment | ~12 | Camber, caster, toe, SAI, included angle, thrust angle and pull/wear diagnosis. |
| Wheels & Tires | ~4 | Tire wear patterns, balance, runout, TPMS and vibration diagnosis. |
Question counts are approximate and show relative weight; the form you sit also includes unscored research questions. Confirm the current task list at ase.com.
The topics A4 candidates miss most
Three families of questions account for most wrong answers on A4, and all three are confusion traps rather than knowledge gaps:
- Memory steer vs. torque steer vs. wander. These three steering complaints feel similar to a customer but point at different components. Memory steer — the wheel pulls back to where you last turned it — is a binding component (a tight upper bearing, a seized strut mount, a binding ball joint). Torque steer — a pull only under hard acceleration — traces to unequal driveaxle angles or a half-shaft issue on a front-driver, not the steering gear. Wander — the car won’t track straight and needs constant correction — is usually a worn linkage or low caster. The complaint narrows the system before you touch anything.
- Worn vs. damaged, and how you load the check. A worn ball joint and a worn control-arm bushing both throw a clunk over bumps. The way you separate them is loading: support the suspension so the joint is loaded or unloaded per the service procedure, then measure axial/radial play against spec. “Worn” is a measurement against a wear limit; “damaged” is a torn boot, bent arm, or collapsed bushing you can see. The exam rewards the measured answer, not the eyeball guess.
- Reading wear and pull back to an alignment angle. A pull follows the most positive camber and the least caster. Tire wear reads back to a specific angle: a feather edge is a toe problem, one-sided shoulder wear is camber, and a cupped/scalloped pattern is usually worn dampers or a balance/runout issue, not alignment at all. And the order of operations matters — ride height comes before alignment numbers, because a sagging spring throws every angle off and “correcting” the alignment on a car sitting low just hides the real fault.
Worked A4 questions
1. Steering pull, no pulling under acceleration. A front-wheel-drive car pulls steadily to the right at a constant cruise, with no change when you accelerate. Alignment shows right-front camber more positive than left and caster nearly equal side to side. What’s the most likely cause of the pull?
- Answer: The unequal camber. A vehicle pulls toward the side with the most positive camber (and toward the side with the least caster). Because caster is nearly equal here, the camber split is doing the pulling. The “no change under acceleration” detail rules out torque steer. Set camber to spec and equal side to side before chasing anything else.
2. Clunk over bumps. A customer reports a clunk over bumps from the left front. You find play when you check the lower ball joint, but the boot is intact. What’s the correct call?
- Answer: Measure the ball-joint play against the manufacturer’s wear limit with the joint loaded or unloaded per the procedure. Feeling “play” is not a diagnosis — a follower-type joint has some designed movement. The exam wants the measured result against spec, taken with the suspension loaded correctly. Condemn the joint only when the measurement exceeds the limit. An intact boot means “worn,” not “damaged.”
3. Tire wear. The right front tire shows a sharp feathered edge across the tread, sharp on one side of each rib. Which angle is most likely out?
- Answer: Toe. A feathered, saw-tooth edge across the tread is the classic toe-wear signature, because the tire is being dragged slightly sideways as it rolls. Camber wear is one-sided shoulder wear; cupping points at worn dampers or a balance/runout problem. Confirm toe on the rack and check for a bent steering or suspension component that pushed it out.
A worked question
A vehicle came in for a complaint that the steering wheel 'stays where you put it' — after a turn it doesn't return to center on its own and the car drifts in the direction of the last turn. An alignment was just performed and all angles read within spec. Technician A says the alignment is fine, so the problem is a binding component in the steering or suspension (memory steer). Technician B says low caster is causing poor return, so the car needs more caster. Who is right?
- A Technician A only✓ correct
- B Technician B only
- C Both A and B
- D Neither
Walk the complaint. “Stays where you put it” and “drifts toward the last turn” is the textbook description of memory steer, where something in the steering or suspension is binding and storing the input instead of letting the wheels self-center. Technician B’s caster theory would be reasonable — low caster does reduce return — except the alignment was just confirmed within spec, which takes caster off the table. With geometry verified, the cause has to be mechanical bind: a seized strut mount, a tight upper bearing, a binding ball joint, or a corroded steering-shaft joint. Technician A is right.
Exam trap: Low caster does hurt steering return — but the alignment was just verified within spec, so caster is not the variable here. The describe-it-back symptom (the wheel HOLDING the last input and the car drifting that way) is memory steer, which is a binding/preloaded component: a tight strut mount or upper bearing, a seized ball joint, an over-tightened or corroded steering-shaft joint, or a binding tie-rod end. The exam is testing whether you can separate a geometry problem (caster) from a mechanical-bind problem (memory steer) when the alignment numbers are already good.
Quick check
A vehicle pulls to the left. Camber is equal side to side, but left-front caster is noticeably less than the right. Which way does the car pull, and why?
Reading your result
Score the worked set and the quick check by area, not as one number. If your misses cluster in alignment — pull direction, angle-to-wear, the ride-height-first rule — that’s your next study block, not the whole test. If they cluster in suspension, drill the loaded vs. unloaded checks and the worn-vs-damaged distinction until the measured answer is automatic. Get each area consistently above about 80% across a few attempts before you register.
When you’re ready, start free A4 practice to drill questions until the complaint-to-cause logic is second nature, review the underlying content in the A4 study guide, and see how A4 fits the rest of the chassis on the Brakes & Chassis study hub. For the full prep approach, start at the ASE study guide. Next up: the A5 Brakes practice test or the A1 Engine Repair practice test, or browse all ASE practice tests.