Written by Andrei Zakhareuski. With over 16 years of expertise, Andrei leads Driving-Tests.org, a top online resource for driver education. His leadership has established vital partnerships with over 2,600 libraries, educational bodies, and state agencies.
In a hurry? Quick summary: The Pre-Trip Inpection is one of the three parts of your CDL Skills test, You will be required to demonstrate a thorough pre-trip inspection of your vehicle to ensure it is safe to drive. This includes checking the engine compartment, brake system, fuel system, and more.
The CDL Pre-Trip Inspection Exam is an integral part of obtaining your commercial driver’s license. This guide covers Class A and Class B pre-trip inspections, provides a checklist, and offers tips for memorizing the inspection process.

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Start a free Pre-Trip Inspection practice test:

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Class A

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Class B

Here’s what to know for the CDL class B.
1

Vehicle Overview

Begin with a general overview of the vehicle, checking for obvious signs of damage or issues.
2

External Inspection

Inspect all external components, including tires, lights, and mirrors.
3

Internal Inspection

Check all internal controls, ensuring everything is functional and within reach.

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What to Remember

  • Lights and reflectors: Ensure all are clean and functional.
  • Engine oil and coolant levels: Check for adequate levels.
  • Steering mechanism: Ensure it’s secure and functioning.
  • Horn: Test for functionality.
  • Windshield wipers: Check for operability and condition.
  • Mirrors: Adjust for optimal visibility.
  • Emergency equipment: Ensure presence and accessibility.
  • Air brake system: Test for leaks and proper pressure.

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Memorization Tips to Help You Out

  • Create a Routine: Develop a consistent order in which to conduct your inspection.
  • Use Mnemonics: Create acronyms or phrases to help remember the steps.
  • Practice Regularly: Hands-on practice is the most effective way to memorize the inspection process.
  • Visual Aids: Use diagrams or checklists as visual reminders.
Pro Tip: Practice the pre-trip inspection in a real-world setting. The more you perform the inspection in a practical environment, the more natural it will become.
Remember, the pre-trip inspection is not just a test requirement – it’s a fundamental safety practice every commercial driver should master. For more resources and detailed guides, visit Driving-Tests.org.

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