This ASE T4 cheat sheet compresses the ASE Brakes (Medium/Heavy Truck certification test into a printable rundown of the facts ASE tests most. It's a premium cheat sheet built by Capital Prep — the one premium prep we trust — and it's yours free. Reinforce it with the rest of your free ASE T4 toolkit: the practice test, study guide, and flashcards.
ASE T4 exam at a glance
- Questions: 60 total (50 scored + 10 unscored research questions)
- Time: 75 minutes
- Result: Pass/Fail, with a per-content-area performance breakdown
- Cost: $34 registration per order + $62 per general test (verify at ase.com)
- Experience: 2 years of relevant hands-on work experience, or 1 year plus a qualifying two-year degree
What’s on the ASE T4 cheat sheet
- Air Brakes Diagnosis & Repair (40 of 50 — 80%) — air supply path end-to-end, governor control of the compressor, compressor faults.
- Hydraulic Brakes Diagnosis & Repair (7 of 50 — 14%) — where they appear, master cylinder diagnosis, pedal feel = the diagnostic.
- Air & Hydraulic Antilock Brakes (ABS), ATC & ESC (3 of 50 — 6%) — ABS basics, A pulsating pedal during hard braking is NORMAL ABS operation, sensor faults.
How to use it in your final week
- Front-load Air Brakes Diagnosis & Repair — at 40 of the 50 scored questions it is about 80% of the test on its own, so if you master one section from the sheet, make it this one.
- Then work Hydraulic Brakes Diagnosis & Repair (7 of 50) — the sheet leads there with where they appear.
- Then work Air & Hydraulic Antilock Brakes (ABS), ATC & ESC (3 of 50) — the sheet leads there with ABS basics.
- Drill the reversal traps until they are reflex — the most commonly flipped one on this test is T4 ≠ A5. T4 is TRUCK air brakes (this test is ~80% air).
- Read the sheet the morning of your appointment for a last pass on the memory hooks, then answer every one of the 60 questions — 10 are unscored research items and you are not told which.
The cheat sheet is your review layer — your ASE T4 practice test drives the exam-readiness ring at the top of this page. Download it, review, then take a full practice exam (or drill with the study guide and flashcards) to see where you stand.
ASE T4 cheat sheet FAQ
Yes — the ASE T4 cheat sheet downloads as a PDF at no cost and with no sign-up. It sits alongside Career Employer's free ASE T4 practice test, study guide, and flashcards, so your whole Brakes (Medium/Heavy Truck prep is free in one place.
It condenses the highest-yield Brakes (Medium/Heavy Truck facts into a fast reference, covering all 3 ASE content areas for this test with their exact question counts — from Air Brakes Diagnosis & Repair through Air & Hydraulic Antilock Brakes (ABS), ATC & ESC — plus the memory hooks and reversal traps ASE tests most.
ASE's official study guide lists T4 as 60 total questions with 50 scored in 75 minutes. The other 10 are unscored research questions ASE uses to build future tests, and you are not told which ones they are — so answer every question.
It is built from ASE's current test specifications and task list for Test T4, including the published per-area question counts. ASE revises task lists periodically, so confirm the live specification at ase.com before test day.
No — the sheet is a cram and review layer, not a full course. ASE also requires two years of relevant hands-on work experience (or one year plus a qualifying two-year degree) for certification, so use the sheet to lock in facts, then work full domain-weighted practice tests to find and fix weak areas.
ASE charges a $34 registration fee per order plus $62 per general test such as T4. A retake is a new test purchase, so verify current pricing on ASE's Dates, Fees & Test Times page before you register.
Air Brakes Diagnosis & Repair — it is 40 of the 50 scored questions, about 80% of the test and the largest single area. Hydraulic Brakes Diagnosis & Repair is next at 7 questions.
Click the download button or the preview card at the top of this page to open the PDF instantly. Bookmark the page so you can pull it up again the morning of your test appointment.
References
- 1.National Institute for Automotive Service Excellence (ASE). “The Official ASE Study Guide — ASE Medium/Heavy Truck Tests (T1–T8).” ase.com, 2026. ↑
- 2.National Institute for Automotive Service Excellence (ASE). “ASE T4 (Brakes (Medium/Heavy Truck)) Certification Test.” ase.com, 2026. ↑
- 3.National Institute for Automotive Service Excellence (ASE). “Dates, Fees & Test Times.” ase.com, 2026. ↑
- 4.National Institute for Automotive Service Excellence (ASE). “Work Experience Requirements for ASE Certification.” ase.com, 2026. ↑
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