The ASE A1 Engine Repair test has 45 scored questions in five content areas, plus 10 unscored questions, and you get 75 minutes for all 55. General engine diagnosis is by far the biggest area at 18 questions (40.0%). Fuel, electrical, ignition, air induction and exhaust systems follow with 9 questions (20.0%), then lubrication and cooling with 8 questions (17.8%), cylinder head and valve train with 6 questions (13.3%), and engine block with 4 questions (8.9%). Every question ties back to one or more tasks in ASE's published task list, so the task list is your checklist. The questions are four-option multiple choice, mostly symptom-to-cause items, with some Technician A / Technician B items and some that show a meter reading or a set of test results. A pass plus documented work experience certifies you for 5 years, and A1 is one of the eight tests for Master Automobile Technician.
01The test specification
The ASE test specification for ASE A1 Engine Repair splits the 45 scored questions across five content areas. ASE adds 10 unscored questions for research, and you have 75 minutes for all of them. Each area links to five free questions.
| Area | Content area | Scored questions |
|---|---|---|
| A | General Engine Diagnosis | 18 (40%) |
| B | Cylinder Head and Valve Train Diagnosis and Repair | 6 (13.3%) |
| C | Engine Block Diagnosis and Repair | 4 (8.9%) |
| D | Lubrication and Cooling Systems Diagnosis and Repair | 8 (17.8%) |
| E | Fuel, Electrical, Ignition, Air Induction and Exhaust Systems Diagnosis and Service | 9 (20%) |
| Total | 45 |
02What is the ASE A1 Engine Repair test?
The ASE A1 Engine Repair test is one of ASE's certification tests for cars and light trucks. It is about the mechanical engine: finding out why an engine is noisy, leaking, burning oil or losing compression, and then repairing the cylinder heads, valve train, block, lubrication and cooling systems. It also asks how faults in the fuel, ignition, electrical, intake and exhaust systems show up as engine problems.
It has 45 scored questions and 10 unscored ones, 55 in all, and you get 75 minutes. Every question is multiple choice with four options, (A) to (D). The unscored questions are there so ASE can gather statistics for future tests, and you cannot tell which ones they are, so treat every question as if it counts.
Passing is one half of certification. ASE also asks you to document relevant work experience, and its study guide says suitable vocational training can be credited toward it; the details are at workexp.ase.com. The study guide does not publish a passing score. Once certified, you hold the certification for 5 years, and you renew it with a shorter recertification test, which for A1 is 23 questions in 30 minutes.
A1 is one of the eight tests, A1 to A8, that ASE lists for recognition as a Master Automobile Technician. The full picture is in how Master Technician status works.
03What does each content area cover?
Area A: General Engine Diagnosis (18 questions)
This is the diagnostic front end of the test, and the task list keeps it to twelve jobs. You confirm the customer's complaint, often with a road test, and look up service history, precautions, bulletins and recalls. You decide whether a no-crank, a crank with no start or a hard start comes from the engine itself or from some other system. You trace fuel, oil and coolant leaks, track down noises and vibration, and work out why an engine uses oil or coolant or puts out smoke of an unusual color or smell. Most of the area is the classic engine tests and what their numbers mean: manifold vacuum or pressure, power balance, compression (cranking, relative and running), cylinder leak-down, a PCV check, and diagnosis with a scope, a multimeter or a scan tool.
Area B: Cylinder Head and Valve Train Diagnosis and Repair (6 questions)
Twenty tasks cover the top of the engine. They run from pulling and cleaning the heads, checking them for cracks, warpage and leaks, and inspecting valves, seats, springs (square and at the right height), retainers, locks and stem seals, to guide wear and stem-to-guide clearance. Then come the parts that move the valves: pushrods, rockers and shafts, lash and lifters, the cam drive (gears, chains, belts, tensioners and guides), cam lobes, journals and bores, and setting cam timing to the crank. The list ends with head gasket surfaces and the maker's bolt torque procedure, variable valve timing and variable lift parts, threads and fasteners, core plugs, and pumps the camshaft drives.
Area C: Engine Block Diagnosis and Repair (4 questions)
The block area lists 23 tasks for only four questions. It covers taking the engine out and putting it back, priming the oil system, and tearing it down with every part marked for position. You inspect the block and bores, the crankshaft (end play, journals, thrust surfaces and the reluctor ring), main and rod bearings and their clearances, cam bearings, balance and other auxiliary shafts timed to the crank, piston and bearing wear patterns, and piston cooling jets. The rest is the damper, flywheel or flexplate condition and runout, pilot bearings, pans and covers, sealants, in-block variable cam timing, and cylinder deactivation.
Area D: Lubrication and Cooling Systems Diagnosis and Repair (8 questions)
Two systems share this area. On the lubrication side you test oil pressure and look for oil leaks, check the oil pump, its pressure relief and its drive, service oil coolers, and fill with the oil type, viscosity and rating the maker calls for. On the cooling side you pressure test and leak test the system, check the radiator, heater core, cap and overflow tank, replace hoses, thermostats (including electronically controlled ones) and water pumps (including electric ones), test and change coolant and bleed out air, and check fans, fan clutches, shrouds, shutters, belts, tensioners and pulley alignment.
Area E: Fuel, Electrical, Ignition, Air Induction and Exhaust Systems Diagnosis and Service (9 questions)
The task list here repeats one pattern for five systems: fuel, air induction, electrical, ignition and exhaust. For each one you diagnose the engine problems its faults cause, then inspect, test, repair or replace its parts. Every task is framed as an engine problem caused by a fault in that system, so study how a fuel, ignition or intake fault shows up at the engine. Computerized engine control diagnosis has a test of its own, A8 Engine Performance.
04What kind of questions are on it?
The ten A1 sample questions in ASE's study guide show the formats you will meet. Most start from a symptom and ask which of four parts or conditions could cause it: a knock that appears only in gear, overheating with white exhaust smoke, a tapping noise for a few seconds on the first start of the day, or a rough cold idle on a direct-injected engine. Read every word of the stem, because the details (only in gear, only cold, only at high rpm) are what rule options out.
Some questions give you numbers to read. One sample shows a multimeter reading taken while the engine cranks; another gives compression results and adds what the technician hears during a leak-down test. You need to know what a normal result looks like and what each abnormal pattern points to.
One sample is a Technician A / Technician B item: two technicians each suggest a cause for blue smoke, and you choose A only, B only, both or neither. Judge each statement on its own before you look at the options. The method is in how to answer Technician A / B questions.
Reading traps
The A1 samples have no EXCEPT question, but the format appears in other ASE guides, and when it is used ASE puts a warning line above the question. In an EXCEPT question three options are true and you pick the odd one out. In a "could be the cause" question, the right answer has to fit every fact in the stem, not just the main symptom.
05Where should your study time go?
Area A is 18 of the 45 scored questions (40.0%), so engine diagnosis deserves the largest block of your time. Add area E (9) and area D (8) and you have 35 of 45 questions (77.8%) in three areas.
The weights and the task counts point in opposite directions. Area A has 12 tasks for 18 questions, so each of its test procedures can carry more than one question: be able to run a compression test, a leak-down test, a vacuum test and a power balance test, and say what each result means. Areas B and C together have 43 tasks for only 10 questions (22.2%). Many of those tasks will not appear on your version of the test, so cover them for breadth: know what each measurement is for and what out of spec means, rather than memorizing procedures.
Use the task list as a checklist. Go through each area, mark every task you could explain to an apprentice, and spend your time on the ones you cannot. ASE says every question represents one or more tasks, so a task you skip is a question you are guessing on. Pace: 55 questions in 75 minutes is about 1 minute 22 seconds each.
06Registering, retesting and recertifying
You register and pay through ase.com. ASE charges a $34 registration fee per order plus $62 for each test, so A1 on its own comes to $96. Each extra test in the same order adds $62, not another $96. ASE sets the registration and scheduling dates, so check ase.com for the current dates and fees before you book. The full breakdown is in ASE test fees and registration.
The test is delivered on screen. ASE offers a free demo of its testing platform at ase.com/free-test-drive, and the study guide notes two language aids: a Leer en español button that shows each question and its options side by side in Spanish and English, with no separate registration, and a Spanish/English pop-up glossary available during all ASE tests. More on the format: how ASE tests work.
If you do not pass, ASE makes you wait 30 days before you can take the test again. Use the month to go back through the task list for the areas that felt weakest, starting with area A, since it carries the most questions.
After you pass, the certification runs for 5 years. To renew it you take the A1 recertification test, 23 questions in 30 minutes; you are eligible for it only after passing the full certification test once.
07Questions people ask
- How many questions are on the ASE A1 Engine Repair test?
- 55 questions in 75 minutes: 45 scored and 10 unscored. ASE uses the 10 unscored questions to gather statistics for future tests, and you cannot tell which ones they are, so answer all 55.
- What is the biggest content area on ASE A1?
- General Engine Diagnosis, with 18 of the 45 scored questions (40.0%). It covers verifying the concern, leaks, noises, oil and coolant consumption, and the vacuum, power balance, compression and leak-down tests. The smallest area is Engine Block Diagnosis and Repair with 4 questions.
- What score do you need to pass ASE A1?
- ASE's study guide does not publish a passing score for A1. It publishes the content areas, the question counts and the task list. Check ase.com for how results are reported.
- How long does ASE A1 certification last?
- 5 years. To renew it you take the A1 recertification test, 23 questions in 30 minutes, which you can take only after passing the full A1 certification test once.
- How much does the ASE A1 test cost?
- ASE charges $62 per test plus a $34 registration fee per order, so A1 on its own is $96. A second test in the same order adds $62. Check ase.com before you book, since fees can change.
- Is ToolboxPrep affiliated with ASE?
- ToolboxPrep is an independent study site. It is not affiliated with or endorsed by ASE (the National Institute for Automotive Service Excellence). Our questions are original practice questions written to the published ASE test specifications; they are not actual test questions.
08Sources
- ASE Automobile Study Guide (Tests A1 to A9), 2026: the A1 test specification, question counts, testing time, the task list this page paraphrases, and the sample-question formats
- ASE (ase.com): the $34 registration fee per order, the $62 fee per test, the 5-year certification period and the 30-day retest wait
The content areas and question counts were checked against ASE's published study guide on October 11, 2026, and the task descriptions paraphrase its task list. ASE's study guide is the final word. If you find one of ours out of date, tell us.
Related: free practice questions · ten free A1 questions · how to answer Technician A / B questions · How ASE tests work
09Practice for this test
ToolboxPrep A1 practice tests are weighted to the specification above, area by area, and every answer is explained, all four options. You can try five sample questions with no account.
Ten free questions per test, no account: free practice questions. How our questions are written and checked: how our questions are made.
ToolboxPrep is an independent study site. It is not affiliated with or endorsed by ASE (the National Institute for Automotive Service Excellence). Our questions are original practice questions written to the published ASE test specifications; they are not actual test questions.