Free ASE A1 Practice Test: Engine Repair
A1 is mostly diagnosis: noises, smoke, compression and leakage results, vacuum readings, oil pressure and cooling problems. Forty percent of the scored questions come from general engine diagnosis.
45 Engine Repair questions in 61 minutes, ASE’s pace, scored by content area with a worked explanation for every answer.
Or start with a free A1 drillEngine oil is found in the coolant reservoir. The engine oil shows no coolant contamination, and the engine has an oil-to-coolant oil cooler. Which of these is the most likely cause?
Watch worked examples, step by step
Engine repair questions from the A1 test, each answer explained.
ASE A1 test format
- Scored questions
- 45
- Unscored research questions
- 10
- Time
- 75 min
- Recertification test
- 23 Qs · 30 min
The unscored questions are mixed in and not marked, so you can’t tell which ones count. Our full A1 practice test gives you the 45 scored-question count in 61 minutes, the same pace as the real test.
What’s on the A1 test
ASE’s task list splits the A1 into 5 content areas. Your score report shows how you did in each one.
| Content area | Scored questions | Share |
|---|---|---|
| A. General Engine Diagnosis | 18 | 40% |
| B. Cylinder Head and Valve Train | 6 | 13% |
| C. Engine Block | 4 | 9% |
| D. Lubrication and Cooling Systems | 8 | 18% |
| E. Fuel, Electrical, Ignition, Air Induction and Exhaust | 9 | 20% |
Take the A1 under real time limits
45 Engine Repair questions in 61 minutes, ASE’s pace, scored by content area with a worked explanation for every answer.
Or start with a free A1 drillFree A1 practice drills
Ten questions with the explanation after each answer. Create a free account to save your results; each drill’s first attempt is free.
ASE A1 questions
How many questions are on the ASE A1 test?
A1 has 45 scored questions plus 10 unscored research questions, 55 in total, with 75 minutes to answer them.
What is the biggest part of the A1 test?
General engine diagnosis: 18 of the 45 scored questions. Lubrication and cooling systems (8) and fuel, electrical, ignition, air induction and exhaust (9) come next.
Ready for test day?
45 Engine Repair questions in 61 minutes, ASE’s pace, scored by content area with a worked explanation for every answer.
Or start with a free A1 drillOther ASE practice tests
- ASE A2 Automatic Transmission/Transaxle practice test
- ASE A3 Manual Drive Train and Axles practice test
- ASE A4 Suspension and Steering practice test
- ASE A5 Brakes practice test
- ASE A6 Electrical/Electronic Systems practice test
- ASE A7 Heating and Air Conditioning practice test
- ASE A8 Engine Performance practice test
- ASE G1 Auto Maintenance and Light Repair practice test
- All ASE practice tests
Format and content areas are from ASE’s published study guide, checked October 2026: ASE Automobile & Light Truck Study Guide (A1–A9) · ASE A Series test page.
Original independent practice written from ASE’s public task list. Not affiliated with or endorsed by the National Institute for Automotive Service Excellence (ASE) or Prometric.