ASE Practice Test: 9 Free Questions + Every Series

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Nine real ASE-format questions drawn from our A4, A5, and A6 banks — the same verified items the full practice app uses. Answer one and the reasoning appears, including why the tempting wrong choice fails. No account, no email.

Mixed ASE practice questions0/9 answered

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. 1

   Excessive toe (in or out) on the front axle MOST characteristically causes:

   AFeather-edge (saw-tooth) tire wear across the treadBCuppingCOne-sided wear onlyDNo wear at all

   Why
   A toe error scrubs the tire sideways as it rolls, producing a feathered, saw-tooth wear pattern across the tread. Cupping comes from worn dampers, one-sided wear is camber, and any toe error does cause wear, so 'no wear' is wrong.

2. 2

   A passive (variable reluctance) wheel speed sensor generates its signal by:

   AReceiving a 5-volt reference and switching a Hall deviceBProducing an AC voltage as a toothed tone ring passes its magnetic pickupCMeasuring resistance change in a thermistorDSending a digital PWM signal from a power supply

   Why
   A passive/VR sensor is a magnet and coil that produces an AC voltage whose frequency and amplitude rise with wheel speed as the tone ring teeth pass. The Hall-effect description fits an active sensor, and thermistor/PWM descriptions are unrelated to a passive WSS.

3. 3

   A 12-volt battery measures 12.2 volts at rest. This indicates the battery is approximately:

   A100 percent chargedBAbout 50 percent chargedCCompletely dischargedDOvercharged

   Why
   An open-circuit reading of about 12.2 volts corresponds to roughly 50 percent state of charge. 12.6 volts is full, around 11.9 volts or less is near dead, and overcharge would not lower the resting voltage.

4. 4

   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?

   ATechnician A onlyBTechnician B onlyCBoth A and BDNeither A nor B

   Why
   Both technicians are correct. A low fluid level lets the pump pick up air, and any leak on the suction side of the pump draws air into the fluid, both causing foaming and noise. Neither cause should be dismissed, so 'Both' is correct.

5. 5

   A disc brake produces a constant pulsation in the pedal during braking that increases with speed. The MOST likely cause is:

   AAir in the hydraulic systemBExcessive rotor lateral runout or disc thickness variationCA worn wheel bearing onlyDGlazed pads

   Why
   Brake pulsation that varies with wheel speed is caused by rotor lateral runout or disc thickness variation (DTV), which cycles the pads in and out as the rotor turns. Air causes sponginess, glazing causes noise/reduced bite, and a worn bearing causes noise/play rather than rhythmic pedal pulsation.

6. 6

   One power window does not operate from either the master switch or its own door switch, but the other windows work. The MOST likely cause is:

   AA blown main power-window fuseBA fault in that window's motor, switch, or wiringCA discharged batteryDA failed body control module affecting all windows

   Why
   If only one window is dead while others work, the fault is local to that window's motor, switch, or wiring. A blown main fuse, dead battery, or failed BCM would typically affect more than one window.

7. 7

   A vehicle continues to bounce two or more times after being pushed down on one corner and released. This 'bounce test' result indicates:

   AA worn shock absorber or strut on that cornerBA bent tie rodCExcessive toeDA clogged fuel filter

   Why
   If the corner keeps bouncing after a push-and-release, the damper has lost its ability to control the spring, indicating a worn shock or strut. A tie rod, toe error, or fuel filter does not affect spring damping.

8. 8

   In a typical leading/trailing or duo-servo drum brake, the term 'self-energizing' (servo action) means:

   AThe shoes apply themselves without hydraulic pressureBDrum rotation wedges the shoe tighter against the drum, increasing braking forceCThe brake adjusts itself electricallyDThe drum cools itself

   Why
   Self-energizing/servo action uses the rotation of the drum to drag the shoe and wedge it harder against the drum, multiplying the applied force. It still needs hydraulic apply, has nothing to do with electrical adjustment, and does not refer to cooling.

9. 9

   The voltage regulator in a charging system controls alternator output by varying the:

   ABelt tensionBRotor (field) winding currentCNumber of diodes in useDBattery's internal resistance

   Why
   The regulator adjusts current to the rotor field winding, which controls the strength of the magnetic field and thus output voltage. It does not change belt tension, switch diodes, or alter battery resistance.

How our free practice tests work

Worth being straight about what this is, because the practice-test category is full of pages that overpromise:

• These are practice questions, not ASE questions. Nobody outside ASE has the live item bank, and any site claiming to publish “real ASE test questions” is either guessing or lying. Ours are written to the published ASE task list for each test and fact-checked by our editorial team against primary sources, so the reasoning matches — the wording does not.
• The question sets on this site are genuinely free. The nine questions above and the worked questions on every series page need no account. The app at app.autotechprep.com starts free too; a paid pass unlocks the full bank, timed full-length sets and score tracking.
• Verified banks exist for A4, A5 and A6 today. Those three series have interactive question sets embedded on-page. Every other series page carries worked questions and a quick check instead, plus the full content-area breakdown — we would rather show you fewer questions than pad the count.
• Counts are approximate on purpose. ASE publishes an approximate number of scored questions per test and mixes in unscored research items, so the on-screen total you see on exam day runs higher than the scored count below.

Pick your ASE practice test

Every certification below has its own practice page — worked diagnostic questions in the real exam’s symptom-to-cause format, the scored content-area breakdown, and the free practice app. Where a study guide exists for the same test, it is linked beside it: the practice page tests you, the study guide teaches the content areas first.

A-series — the eight tests that count toward Master Automobile

Pass all eight A-series tests (A1–A8) and meet the experience requirement, and ASE awards the Master Automobile Technician credential.

• A1 Engine Repair practice test — compression, leak-down, valvetrain wear, head-gasket diagnosis (~46 scored questions) · A1 study guide
• A2 Automatic Transmission practice test — road test sequence, line pressure, electronic vs. hydraulic control (~50 scored questions) · A2 study guide
• A3 Manual Drive Train & Axles practice test — clutch, manual transmission, driveline, U-joints (~40 scored questions)
• A4 Suspension & Steering practice test — alignment angles, steering pull, ball-joint loaded checks (~40 scored questions) · A4 study guide
• A5 Brakes practice test — hydraulic diagnosis, pedal feel, rotor measurement, ABS (~45 scored questions) · A5 study guide
• A6 Electrical practice test — voltage drop, charging circuits, parasitic draw, network bus faults (~50 scored questions) · A6 study guide
• A7 Heating & A/C practice test — gauge-set diagnosis, TXV vs. orifice tube, EPA Section 609 rules (~50 scored questions) · A7 study guide
• A8 Engine Performance practice test — fuel trim, misfire codes, EVAP, OBD-II data interpretation (~50 scored questions) · A8 study guide

A9 — light-duty diesel specialty

A9 carries an A-series code but is a specialty test: A9 does not count toward Master Automobile, which is A1–A8 only. It is the right credential for techs working light-duty diesel trucks and SUVs.

• A9 Light Vehicle Diesel practice test — light-duty diesel fuel systems, glow plugs, DPF regeneration, aftertreatment (~50 scored questions)

G1 — entry-level, cross-system

• G1 Maintenance & Light Repair practice test — the broad entry point for students and first-year techs, covering basic service across every system (55-question blueprint, does not count toward Master) · G1 study guide

L1 — advanced specialist

• L1 Advanced Engine Performance practice test — open-reference Composite Vehicle scenarios for advanced driveability diagnosis (requires A8 certification, $124 fee, ~45 scored questions) · L1 study guide

Taking the A-series in order? The A-series test prep pillar lays out the sequence most techs use.

Start a free practice test now →

Compare the ASE test series

Same exam engine, different content and different price. The table is the fast way to see which test you are actually signing up for:

Test	Center of gravity	Approx. scored Q	Test fee	Counts toward Master Auto?
A1 Engine Repair	Mechanical engine — what you find with it apart	~46	$62	Yes
A2 Automatic Transmission	Diagnosis before teardown; overhaul is the biggest block	~50	$62	Yes
A3 Manual Drive Train	Clutch, manual gearbox, driveline, axles	~40	$62	Yes
A4 Suspension & Steering	Alignment angles read back from a pull or a wear pattern	~40	$62	Yes
A5 Brakes	Hydraulics is the largest single area, then disc and ABS	~45	$62	Yes
A6 Electrical	Voltage-drop reasoning across every circuit	~50	$62	Yes
A7 Heating & A/C	Gauge patterns, controls, EPA Section 609 handling	~50	$62	Yes
A8 Engine Performance	Driveability from data — trims, codes, monitors	~50	$62	Yes
A9 Light Vehicle Diesel	Light-duty diesel fuel, turbo, DPF/SCR	~50	$62	No — specialty
G1 Maintenance & Light Repair	Safe maintenance judgment across every system	~50	$62	No — standalone
L1 Advanced Engine Performance	Open-reference Composite Vehicle diagnosis	~45	$124	No — requires A8

Read the fee line carefully, because it trips people up: the $34 registration is per test window, not per test. Sign up for three A-series tests in one window and you pay $34 once plus $62 three times — $220, not $288. L1 is the exception at $124 for the test itself.

What the ASE certification exam covers

Every ASE automobile test follows the same format: about 40–50 scored multiple-choice questions built around diagnosis, not recall. You get a symptom or a measurement and four plausible answers — only one survives the reasoning. The exam also includes unscored research questions mixed in, so the on-screen total runs higher than the scored count.

Certifications are valid for five years before a recertification test is required. You can sit for any test before meeting the experience requirement — ASE issues the credential once you have two years of relevant hands-on experience (one year with qualifying education or training).

G1 covers basic maintenance across every system — it is the lowest-barrier ASE credential and a practical first step for students and career changers. L1 is the opposite end: an advanced specialist test that requires A8 certification first and uses the ASE Composite Vehicle reference booklet during the exam. One thing to know if you are working from older study material: the E-series truck equipment tests were retired after January 1, 2026, so any prep list that still includes them is out of date.

For the full breakdown of every test, fees, and the Master path, see the ASE certification guide. For the study content behind each test, start with the ASE study guide.

What a real ASE question looks like

ASE questions are written for diagnosis, not recall. The classic format gives you a symptom and four plausible parts, and only one answer survives the reasoning. A typical example:

A vehicle’s headlights are dim. A voltmeter reads 12.6 V at the battery and 11.9 V at the headlight socket with the lights on. Technician A says to replace the bulbs. Technician B says to check the circuit for voltage drop. Who is correct?

The answer is Technician B. That 0.7-volt difference under load is the test telling you resistance is stealing voltage somewhere in the feed or ground. Replacing the bulb does nothing. If a practice test isn’t asking questions in this shape — “here’s a measurement, what does it mean?” — it isn’t preparing you for the real exam.

How to use your practice score

Treat each practice result as a study map, not a grade:

• Sort misses by content area, not by count. Five wrong answers all in “hydraulic diagnosis” is a clear signal; five spread across the test is noise.
• Re-read the rationale, not just the right letter. The reasoning is the transferable skill; the specific question won’t be on the real test.
• Re-test the weak area only. Once a content area is consistently above ~80%, move on. Chasing 100% everywhere wastes time you should spend on your worst area.
• Track consistency across attempts. One good score can be luck. Three in a row above your target means you’re ready to register.

Ready to drill your specific test? Pick one from the practice test index above, or start free practice now. Studying the content first? Start with the ASE certification guide and the per-system study hubs, then come back here to test yourself. Ready to book the real exam? See what ASE tests cost and how to register.