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Haulprep: CDL Practice Test

Collet Education Contains ads

See every question you got wrong. CDL permit test prep: air brakes, hazmat, more

Price
Free
No in-app purchases
Updated
Oct 10
2026 · v1.0.0
Get it onGoogle Play See alternatives

Screenshots

  • Haulprep: CDL Practice Test screenshot 1
  • Haulprep: CDL Practice Test screenshot 2
  • Haulprep: CDL Practice Test screenshot 3
  • Haulprep: CDL Practice Test screenshot 4
  • Haulprep: CDL Practice Test screenshot 5

About Haulprep: CDL Practice Test

Ads that cover your score so you can't see what you got wrong? Not here. Haulprep shows your result and every missed question with the right answer and a short explanation. No ad sits on top of it.

Questions are written from the public CDL manual guidelines. Haulprep is a study aid and is not affiliated with FMCSA or any state DMV. Always check your state's CDL manual. https://www.fmcsa.dot.gov/cdl

Built for the CDL permit (CLP) written test. Study in sets of 10, take mock tests, and fix your mistakes until they stick.

WHAT YOU GET
• CDL practice test sets of 10 questions with instant feedback
• A 1-2 sentence explanation for every question
• Mock tests: General Knowledge 50 questions, endorsements 25
• Mistakes notebook: missed questions are saved automatically. Get one right twice in a row and it clears
• Readiness % per topic, with the 80% passing line marked
• Quit mid-set? Your progress is saved. Pick up where you left off
• Test date countdown and a daily study reminder

TOPICS
General Knowledge, Air Brakes, Combination Vehicles, Hazmat endorsement, Tanker endorsement, Doubles and Triples, Passenger, School Bus.

HOW TO STUDY
1. Pick a topic and practice 10 questions.
2. Read the explanation on every miss.
3. Open Mistakes and practice only those.
4. When a topic passes 80%, take the mock test.

Ads appear only between sets, never during a question or on your results. Works offline. No account needed.

What’s new

Version 1.0.0 · Updated October 10, 2026

First release: CDL practice tests, mock tests, mistakes notebook and readiness by topic.

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