pre trip inspection class a quizlet

• Register / Login
• Trucker's Forum
• Paid CDL Training
• Truck Driving Jobs
• CDL Practice Tests
• High Road Training

Pre-Trip Inspection Study Guide

Our Pre-Trip Inspection Study Guide has everything you need to prepare for the Class A CDL Pre-Trip Inspection Exam . Our study guide will cover the pre-trip inspection terminology as well as a thorough list of all of the parts you will be inspecting on the vehicle. For each part you will be inspecting there will also be a list of items you will be checking for. Our study guide is broken down into the following sections:

• What You Need to Know About Pre-Trip Inspection

Pre-Trip Inspection Practice Questions

• Pre-Trip Inspection Checklist

Pre-Trip Inspection Videos

Pre-trip inspection printable resources, what you need to know about the pre-trip inspection.

The Pre-Trip Inspection is a thorough inspection of the vehicle and all of its major systems. Inspecting the vehicle before driving each day is a Federal requirement and normally takes about 15 minutes. It must be logged in your logbook as "on duty not driving."

You will have to do thorough safety inspections of the coupling system, the vehicle lights, engine compartment, tires and brakes, the chassis, the fuel tanks, and an in-cab inspection.

The following information is a brief summary of Daniel's Complete Pre-Trip Inspection taken from our oustanding free PDF download:

Engine Compartment

You will be checking the engine compartment for any sort of leaks. You will also be checking to see if all components are properly mounted and secured. None of the mounts must be cracked, bent, or broken.

You will be checking all hoses to make sure they aren't leaking, frayed, or sliced and the fluid levels including the oil level, the coolant, and the power steering fluid.

You must check the components like the water pump, the power steering pump, and the alternator to make sure nothing is leaking, the belts are not frayed, and that everything is properly mounted and secured.

From inside the engine compartment you will also find the steering system, the front suspension system, and the front brake system. All components of these systems must be properly mounted and secured without anything being cracked, bent, or broken. Finally you will be checking the tires, rims, and axle seals to make sure the tires are properly inflated, the rim isn't bent or cracked, and the axle seals are not leaking.

Fuel Tank And Battery Area

You will be standing along the side of the tractor doing a series of checks on the mirrors, fuel tanks, batteries, exhaust system, and more. You will check to make sure nothing is bent, cracked, broken, or leaking.

Check the mirrors, door hinges, door handle to make sure nothing is cracked, bent, or broken. Check to make sure there is no fuel leaking and that the fuel cap is secured and the gasket is not missing.

Check the exhaust system to make sure nothing is cracked, bent, or broken. Check the driveshaft, cat walk, and steps to make sure nothing is cracked, bent, or broken.

Check the frame and crossmembers for structural integrity. Check the air lines going to the trailer to make sure they're properly connected and that there are no abrasions, bulges, or cuts. Make sure the gaskets are present.

Check the suspension system and brakes on the drive axles, making sure nothing is cracked, bent, or broken. Make sure the brake linings are the proper thickness and that the air bags and properly inflated. Inspect the brake chambers, slack adjusters, and pushrods are properly mounted and secure. Not Cracked, Bent, or Broken. With the brakes released and pulled by hand, the Push Rod should not move more than 1 inch.

Check the rims, tires, and axle seals of the drive tires for proper inflation, no leaks around the seal, and the lugs are all present and secured.

Coupling System

You will be standing where the tractor and trailer are connected and you'll start by checking the electrical line and air lines to make sure they're properly mounted and secure at both ends. No abrasions, bulges or cuts. Not leaking air. Make sure the electrical line has no wires exposed. Check the gladhands to make sure the seals are in good condition, no cracks or signs of dry rotting. Not leaking air.

Check the skid plate of the fifth wheel and the apron of the trailer to make sure there is no debris and nothing is cracked, bent, or broken. Make sure the fifth wheel is properly greased. Also make sure there is no gap in between the fifth wheel and the trailer apron once the tractor and trailer are coupled. Make sure the kingpin of the trailer is properly mounted and not cracked, bent, or broken and that the locking jaws of the fifth wheel are properly secured when the tractor and trailer are coupled.

Check the mounting bolts where the fifth wheel attaches to the tractor frame. Make sure there are no missing bolts and that everything is secured properly. Check the locking pin if you having a sliding fifth wheel to make sure it's properly locked into place.

Make sure that there is the proper clearance space between the tractor mudflap and the trailer landing gear so that they don’t hit each other when making a turn.

You will start inspecting the trailer at the head board, which is the front wall of the trailer. Make sure there are no holes or missing rivets. Check the landing gear to make sure it is properly mounted and secure. Not cracked, bent, or broken. Make sure the fully raised and the handle is secure in the cradle when the tractor and trailer are coupled.

Check the frame and crossmembers under the trailer to make sure they're not cracked, bent, or broken. Check the tandem frame and release pins to make sure the frame is in good condition and the release handle and locking pins are in the fully locked position.

You will check the entire suspension and brake system for the trailer tandems the same way you did for the drive axles of the tractor. You will also make sure the mudflaps are properly secured. For dual tires check to see that there is proper space between the tires and there is nothing stuck between the tires.

Check the rear door and hinges to make sure they are properly mounted and nothing is cracked, bent, or broken. Make sure the door seals are not worn, torn, or dry rotted.

Light Check

You will be checking all of the lights and reflectors on both the tractor and the trailer. Check the reflectors and reflective tape to make sure they are properly mounted and secure, not cracked, bent, or broken, and clean and illuminated. Check that you have the proper color of amber to the front and sides, and red to the rear.

Start by turning on your marker lights and headlights. Now walk around the entire truck and trailer and point out the lights. Give the function of the light and the location. You should then ask your examiner to help you check your five functions.

While you're sitting in the drivers seat, the examiner will stand to the front of the truck, then behind the trailer. He will then check your Turn Signals, Four Way Flashers and Brake Lights. You must do each function at every location.

The five locations that you must check your lights:

• Front of the Truck
• Both sides of the Truck
• Rear of the Truck
• Both sides of the Trailer
• Rear of the Trailer

The Five Functions you are checking for:

• Left Turn Signal
• Right Turn Signal
• Four Way Flashers
• High Beams/Low Beams
• Brake Lights

In-Cab Inspection

The in-cab inspection and air brake check will cover the various gauges and systems inside the cab along with several tests to make sure you air brake system is working properly.

You will start by checking the following:

• Seat Belt- Properly Mounted and Secure. Not ripped or frayed Adjusts and latches properly.
• Fire Extinguisher- Properly Mounted and Secure. Fully charged
• Three Red Reflective Triangles- My three red reflective triangles are GIVE LOCATION
• Spare Electrical Fuses- My spare electrical fuses are GIVE LOCATION
• Volmeter, Oil Pressure Gauge, Water Temperature Gauge, and Air Pressure Gauge all show proper operation
• City horn and air horn functioning properly
• The windshield and mirrors are clean, no cracks or breaks, no obstructions. The mirrors are in proper adjustment.
• Windshield Wipers and Washers - Demonstrate that the washers work by spraying the windshield. The Wipers are: Properly Mounted and Secure and operate smoothly. The blades aren't cracked or dry rotten.
• Heater and Defroster - Demonstrate that both the Heater and Defroster are working properly.
• Lighting Indicators - Left Turn, Right Turn, Four Way Flashers, and High Beams.

Trailer Parking Brakes - Set the Trailer Brake, release the tractor brake, and then tug lightly on the trailer.

Tractor Parking Brakes- Then set the Tractor Brake, release the trailer brake, and then tug lightly on the tractor.

Service Brake Check - Release both Tractor and Trailer Brakes. Now drive at idle speed. Apply the Service Brake to make sure you come to a complete stop, and that it doesn't pull to the left or right when applying the brakes.

Air Brake Test

The air brake test will consist of a leakdown test to make sure your air brakes aren't leaking air and losing pressure. It will also test the warning lights and buzzer to make sure the driver gets the proper warning if the air pressure drops too low.

There are three stages to an Air Brake Test

#1: Applied Pressure Test

#2: Warning Light and Buzzer

#3 Tractor/Trailer Protection Valve Pop Out

Applied Pressure Test: Build the air pressure to governor cut out. Put the truck in the lowest gear. Then turn off the engine Immediately turn the engine back on. Push in both the tractor and trailer valves. (This will release the parking brakes.) Push and hold the Brake pedal fully. Allow the gauges to stabilize. Announce the gauges have stabilized and the Primary and Secondary PSI. With the Brakes fully pressed, you should not lose more than 4 PSI in one minute. Announce that you are listening for air leaks during that minute.

Warning Light and Buzzer Test: Pump down on the Brake pedal until the warning light and buzzer comes on, at or before 60 PSI.

Tractor/Trailer Protection Valve Pop Out Test: Pump down on the brake pedal until both the tractor and trailer protection valves pop out. They should both pop out between 40 and 20 PSI.

We have a ton of Pre-Trip Inspection Practice Questions along with the answers and a complete scoring system in our Free Online CDL Practice Tests :

The Engine Compartment Section will include questions about checking the oil level and coolant levels, inspecting belt-driven engine components (like the water pump, alternator, and air compressor), and the safety devices required in the cab. There will also be questions regarding the windshield wipers and free play in the steering wheel.

The Lights And Brakes Section will include questions about dashboard indicator lights, inspecting the parking brakes, and doing a leakdown test on the air brakes. It will also include questions about the low air pressure warning signal and testing your air horn and city horn.

The Suspension And Steering Section will include questions about the tractor protection valve, inspecting the steering box, and inspecting many suspension system parts. It will also include questions about welds being present on tire rims and the minimum tread depth required on steering axle tires.

The Tires And Coupling Devices Section will include questions about shiny trails or rusty threads on lug nuts, inspecting the battery box and cover, and inspecting electrical lines. It will also contain questions about inspecting the coupling devices and the fifth wheel skid plate.

The Emergency Equipment And Fifth Wheel Section will include questions about additional emergeny equipment required by school buses, inspecting the gap between the kingpin apron and the fifth wheel skid plate, and the landing gear securement. It will also contain questions about inspecting driver mirrors and the trailer frame.

Pre-Trip Inspection Checklist - Class A

Our pre-trip inspection checklist covers every part of the truck from front to back, both inside and outside of the truck. It covers the air brakes, suspension parts, steering components, wheels and rims, fuel tanks, batteries, lights, and more. It also covers the air brake tug test and checks for everything under the hood including alternator, water pump, fuel pump, fluids, and more.

This is a super handy checklist to study anytime you have a few minutes to spare:

Pre-Trip Inspection Checklist - Free Word Document Download (Editable Version)

Pre-Trip Inspection Checklist - Free PDF Download (Print Version)

Pre-Trip Inspection Video By Apex CDL Institute

Jeff from Apex Institute does an in-depth explanation of the entire pre-trip inspection process. This video is loaded with tips that go beyond the CDL test to help drivers really understand how to identify problems.

Pretrip Inspection Self-Test By CDL College

The Pretrip Inspection Self-Test By CDL College is really unique. It's a silent video which will show you the part you're inspecting and then gives you a few seconds to figure out what you should be checking for before giving you the answer. Definitely check this one out. Great for practicing before the CDL exam.

Pre-Trip Inspection Video By Averitt Express

This is a complete back to front pre-trip inspection of a truck and trailer by Averitt mainentance associate Kevin Breeding. This thorough pre-trip inspection covers all inportant points of inside the cab, lights, engine, the tractor itself and the trailer.

We have included two print versions of the pre-trip inspection process from Daniel. The first is the entire pre-trip inspection and the second is an abbreviated checklist for the inspection.

• PDF: Daniel's Pre-trip Inspection (Print Version)
• PDF: Daniel's Pre-trip Inspection Checklist (Print Version)

Why Join Trucking Truth?

• The High Road Training Program
• The High Road Article Series
• The Friendliest Trucker's Forum Ever!
• Email Updates When New Articles Are Posted

Apply For Paid CDL Training Through TruckingTruth

Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? Seriously! The application only takes one minute. You will speak with recruiters today. There is no obligation whatsoever. Learn more and apply here:

• Privacy Policy

• Free Practice Tests

Commercial Driving

• Introduction

Getting a CDL

• Fees and costs

CDL Types & Permits

Endorsements & Restrictions

CDL Exam Preparation

Written exams

Practical exams

• Skills test
• Pre-trip inspection
• TSA background check
• Retake policy

CDL Maintenance

ELDT Training & Certification

CDL how-to guides

Mastering the CDL Pre-Trip Inspection Exam: A Complete Guide

Learn how to conduct thorough pre-trip inspections with our guide, a critical component for commercial vehicle safety.

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.

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.

​ Start a free Pre-Trip Inspection practice test:

• Alabama - AL - Alabama Pre-Trip Inspection Practice Test
• Alaska - AK - Alaska Pre-Trip Inspection Practice Test
• Arizona - AZ - Arizona Pre-Trip Inspection Practice Test
• Arkansas - AR - Arkansas Pre-Trip Inspection Practice Test
• California - CA - California Pre-Trip Inspection Practice Test
• Colorado - CO - Colorado Pre-Trip Inspection Practice Test
• Connecticut - CT - Connecticut Pre-Trip Inspection Practice Test
• Delaware - DE - Delaware Pre-Trip Inspection Practice Test
• District of Columbia - DC - District of Columbia Pre-Trip Inspection Practice Test
• Florida - FL - Florida Pre-Trip Inspection Practice Test
• Georgia - GA - Georgia Pre-Trip Inspection Practice Test
• Hawaii - HI - Hawaii Pre-Trip Inspection Practice Test
• Idaho - ID - Idaho Pre-Trip Inspection Practice Test
• Illinois - IL - Illinois Pre-Trip Inspection Practice Test
• Indiana - IN - Indiana Pre-Trip Inspection Practice Test
• Iowa - IA - Iowa Pre-Trip Inspection Practice Test
• Kansas - KS - Kansas Pre-Trip Inspection Practice Test
• Kentucky - KY - Kentucky Pre-Trip Inspection Practice Test
• Louisiana - LA - Louisiana Pre-Trip Inspection Practice Test
• Maine - ME - Maine Pre-Trip Inspection Practice Test
• Maryland - MD - Maryland Pre-Trip Inspection Practice Test
• Massachusetts - MA - Massachusetts Pre-Trip Inspection Practice Test
• Michigan - MI - Michigan Pre-Trip Inspection Practice Test
• Minnesota - MN - Minnesota Pre-Trip Inspection Practice Test
• Mississippi - MS - Mississippi Pre-Trip Inspection Practice Test
• Missouri - MO - Missouri Pre-Trip Inspection Practice Test
• Montana - MT - Montana Pre-Trip Inspection Practice Test
• Nebraska - NE - Nebraska Pre-Trip Inspection Practice Test
• Nevada - NV - Nevada Pre-Trip Inspection Practice Test
• New Hampshire - NH - New Hampshire Pre-Trip Inspection Practice Test
• New Jersey - NJ - New Jersey Pre-Trip Inspection Practice Test
• New Mexico - NM - New Mexico Pre-Trip Inspection Practice Test
• New York - NY - New York Pre-Trip Inspection Practice Test
• North Carolina - NC - North Carolina Pre-Trip Inspection Practice Test
• North Dakota - ND - North Dakota Pre-Trip Inspection Practice Test
• Ohio - OH - Ohio Pre-Trip Inspection Practice Test
• Oklahoma - OK - Oklahoma Pre-Trip Inspection Practice Test
• Oregon - OR - Oregon Pre-Trip Inspection Practice Test
• Pennsylvania - PA - Pennsylvania Pre-Trip Inspection Practice Test
• Rhode Island - RI - Rhode Island Pre-Trip Inspection Practice Test
• South Carolina - SC - South Carolina Pre-Trip Inspection Practice Test
• South Dakota - SD - South Dakota Pre-Trip Inspection Practice Test
• Tennessee - TN - Tennessee Pre-Trip Inspection Practice Test
• Texas - TX - Texas Pre-Trip Inspection Practice Test
• Utah - UT - Utah Pre-Trip Inspection Practice Test
• Vermont - VT - Vermont Pre-Trip Inspection Practice Test
• Virginia - VA - Virginia Pre-Trip Inspection Practice Test
• Washington - WA - Washington Pre-Trip Inspection Practice Test
• West Virginia - WV - West Virginia Pre-Trip Inspection Practice Test
• Wisconsin - WI - Wisconsin Pre-Trip Inspection Practice Test
• Wyoming - WY - Wyoming Pre-Trip Inspection Practice Test

​ CDL Class A Pre-Trip Inspection

Engine Compartment Inspection

Includes checking for leaks, belt tension, and the condition of hoses, among other components.

Cab Check/Engine Start

Involves inspecting the cab’s interior, gauges, and starting the engine to check for abnormalities.

Brake Check

Focuses on air brake systems, including air brake checks and the parking brake test.

​ CDL Class B Pre-Trip Inspection

Vehicle Overview

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

External Inspection

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

Internal Inspection

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

​ Pre-Trip Inspection Checklist

• Lights and reflector s: 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.
• Mirror s: Adjust for optimal visibility.
• Emergency equipment : Ensure presence and accessibility.
• Air brake system : Test for leaks and proper pressure.

​ Tips for Memorizing the Pre-Trip Inspection for CDL

• 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 .

Secure your CDL with confidence!

Our exclusive CDL Premium program offers comprehensive online training with an ELDT certificate, authentic exam questions, and a solid Pass Guarantee, starting at only $49. Ideal for first-time applicants, seasoned drivers, and those new to the U.S. road rules.

Explore CDL Premium

Was this page helpful?

• Start a free Pre-Trip Inspection practice test:
• CDL Class A Pre-Trip Inspection
• CDL Class B Pre-Trip Inspection
• Pre-Trip Inspection Checklist
• Tips for Memorizing the Pre-Trip Inspection for CDL

CDL Pre-Trip Inspection Checklist

Studying this Class-A CDL pre-trip inspection checklist is an important part of truck driver training. Before getting your Class-A CDL and finding an entry level truck driving job , most states will require students to pass a DOT (department of transportation) pre-trip inspection test and a general knowledge test .

Each company’s pre-trip inspection varies slightly. Most likely you will have to do the coupling system, light check and in-cab inspections plus one of the remaining three sections.

Pre Trip Inspection Checklist

Download free and print it! Printable Pre Trip Inspection Checklist (PDF)

There are many sections to learn but the test is not as difficult as it may seem. Studying our simplified Class-A pre-trip inspection checklist and taking classes at your local CDL training school will get you prepared.

Engine Compartment

Driver door fuel area, coupling area, light check, in-cab inspection and brake tests, belt driven alternator, belt driven water pump, brake chamber, brake lining, caste nuts and cotter pins, coolant reservoir, gear box and hoses, gear driven air compressor, gear driven power steering pump.

• General Hoses

Leaf Springs

Power steering fluid reservoir, shock absorber, slack adjuster and push rod, spring hanger, steering column, what to check for:.

When checking the engine compartment, you will always want to make sure the following components are properly mounted and secured. You should also make sure they are not cracked, bent or broken. The items you will need to check for include:

• Make sure all of the wires are connected. The belt should not be cracked or frayed and the free play on the belt should be between ½ to ¾ of an inch.
• The free play on the belt should be between ½ to ¾ of an inch. Also check all the hoses running to and from the water pump to make sure nothing is leaking.
• The brake chamber should not be leaking air.
• The brake drum should be properly mounted and secure.
• The brake hose is rubber, so it is important to make sure it is not leaking air.
• Check for oil or debris on the lining. There should be at least ¼ of an inch of friction material.
• Make sure all three caste nuts and cotter pins are present.
• The reservoir should not leaking and must be filled to the manufacturer’s specifications.
• Make sure the drag link is properly mounted and secure, and not cracked, bent or broken.
• The gear box and hoses should have no abrasions, bulges or cuts, and should not be leaking.
• Although the air compressor is hard to see, you must make sure it is properly mounted and does not leak.
• The steering pump is located in the same place as the air compressor and is also gear driven. Ensure the steering pump is not leaking.

General Hoses (Passenger and Driver’s Side)

• The hoses should be secure at both ends. There should be no abrasions, bulges or cuts. Fluids run through these hoses, so it is important to make sure they are not leaking.
• The hub seal (or axle seal) should not be leaking and should be filled to the manufacturer’s specifications.
• Make sure none of the leaf springs have shifted.
• Check for leaks under the truck.
• There should be no lug nuts missing. Look for rust trails, powder residue and cracks around the bolt holes.
• The oil level should be filled to the manufacturer’s specifications.
• Make sure the pitman arm is properly mounted and secure. It should be not cracked, bent or broken.
• Make sure this reservoir is not leaking and filled to the manufacturer’s specifications.
• The rim cannot have any unauthorized welds.
• Make sure the shock absorber is not leaking. If it is leaking, the leak will be at the point where the top and bottom portion of the shock meet.
• With the brakes released and pulled by hand, the push rod should never move more than one inch.
• The spring hanger should be properly mounted and secure.
• Make sure the steering column is properly mounted and secure. It should not be cracked, bent or broken.
• Look for abrasions, bulges or cuts on the tread or sidewalls. Tread depth should have a depth no less than 4/32 of an inch. Tires must be properly filled to the manufacturer’s specifications. This can be checked with an air gauge.
• Make sure the tie rod is properly mounted and secure, not cracked, bent or broken.
• Make sure all are accounted for.

Back to top of Engine Compartment

Catwalk and Steps

Door and hinges, drive shaft, exhaust system, frame and cross members, spring mount.

Again it is important to make sure these items are properly mounted and secure. Look for cracks, bends, and breaks.

• The actual airbag is rubber, so it is important to check for abrasions, bulges, cuts and leaks, in addition to any missing mounting bolts.
• The axle seal should not be leaking and should be filled to the manufacturer’s specifications.
• Make sure to mention the brake chamber is not leaking air.
• Make sure the brake drum is secured properly. Also look for cracks, bends and breaks.
• Check the brake hose at both ends to make sure it is not leaking air.
• There should be no oil or debris on the brake lining. There should be at least ¼ of an inch of friction material.
• The cat walk and steps should be clear of any loose objects.
• Physically demonstrate that the doors open, close and latch properly. Door seals should not be worn, torn or rotten.
• The drive shaft should not be twisted and the u-joints should be free of any debris.
• The tread and sidewalls should have no abrasions, bulges or cuts. The tread depth should be no less than 2/32 of an inch. Tires should be properly filled to the manufacturer’s specifications. This can be checked with an air gauge.
• The exhaust system should show no signs of leaks.
• There should be no unauthorized holes or welds. Bundle up the cross members to ensure none are missing.
• Fuel should not be leaking from the tank and the cap should always be on tight.
• Rust trails could indicate loose bolts, while powder residue and racks around the bolts could mean the bolts have been over-tightened.
• Mirrors should be clean for best visibility.
• Make sure the mud flap is secured properly. Also look for cracks, bends and breaks.
• Make sure to mention there should be never be any unauthorized welds.
• The shock absorber should be secure at both ends and not leaking. If it does leak, it will leak in the middle.
• With the brakes released and pulled by hand, the push rod should not move more than one inch.
• If you are equipped with duals, check to see there is proper spacing between the tires and there is nothing stuck.
• The spring arm should be secure at both ends.
• The spring mount should be secure at both ends.
• Make sure the torque arm is secured properly. Also look for cracks, bends and breaks.
• Make sure to check and mention that no U-bolts are missing.

Back to  top of Driver Door Fuel Area

Electric Line

Locking jaws, mounting bolts, release arm, sliding fifth wheel locking pin.

• Air lines should be secure at both ends with no abrasions, bulges or cuts. They should not be leaking, dragging or tangled.
• Make sure the apron is properly mounted and secure. Look for cracks, bends and breaks.
• Make sure there is enough space between the tractor mudflap and the trailer landing gear so that they don’t hit each other when making a turn.
• The electric line should be secure at both ends. There should be no abrasions, bulges, cuts or exposed wires.
• The gap is not an actual item, however there should be no space between the apron and the skid plate.
• The seals should be in good condition with no cracks, signs of rotting, or leaking air.
• Make sure the king pin is properly mounted and secure. Look for cracks, bends and breaks.
• You must physically check that the locking jaws is fully locked around the king pin.
• No mounting bolts should be missing.
• Make sure the platform is properly mounted and secure. Look for cracks, bends and breaks.
• The release arm should be in the fully locked position.
• The skid plate needs to be properly lubed.
• The pin must be in the fully locked position.

Back to top of Coupling Area

Header Board

Landing gear, rear door and hinges.

• Shock Absorbers

Tandem Frame and Release

Trailer tire.

• Again make sure the airbag has no abrasions, bulges, cuts or leakings. The airbag should not be missing any mounting bolts.
• The brake chamber should be properly mounted so that is does not leak air.
• The brake hose should be secure at both ends with no abrasions, bulges, cuts or leaks.
• Check for oil or debris on the brake lining. There should be at least ¼ of an inch of friction material.
• There cannot be any missing cross members.
• The header board cannot have any holes or missing rivets.
• The landing gear must be fully raised and the cradle handle secure.
• Rust trails indicate loose bolts. Powder residue and cracks around the bolt holes could be an indication of over-tightened bolts.
• The rims cannot have any unauthorized welds.
• The rear door should open, close and latch properly. Door seals should not be worn, torn or dry rotten.
• The shock absorber should be checked at both ends for leaks.
• When the brakes are released and pulled by hand, the push rod should not move more than one inch.
• Release handle and locking pins should be in the fully locked position.

There should be no abrasions, bulges or cuts to the tread or sidewalls. Tread depth should be no less than 2/32 of an inch. The tire should be properly filled to manufacturer’s specifications and checked with an air gauge.

• Front of the truck
• Both sides of the truck
• Rear of the truck
• Both sides of the trailer
• Rear of the trailer

Back to top of Trailer

The five functions are:

• Left turn signal
• Right turn signal
• Four way flashers
• High/low beams
• Brake lights

Back to top of Light Check

• Airbrake Test

Air Pressure Gauges

Emergency equipment, heater and defroster, lighting indicators, oil pressure gauge, parking brake, service brake check, water temperature gauge, windshield and mirrors, windshield wipers and washers.

The last section is In-Cab Inspection and Brake Tests. For the In-Cab Inspection you will once again want to make sure all of the following components are properly mounted and secure. As well as the following:

Air Brake Test

There are three stages to an air brake test:

• Applied Pressure Test – When doing the Applied Pressure Test, you will want to build the air pressure to governor cut out. Put the truck in the lowest gear, turn the engine off and immediately turn it back on. Push in the tractor and trailer valves which will then release the parking brakes. Push and hold the brake pedal, allowing the gauges to stabilize. When the gauges have stabilized, announce the Primary and Secondary PSI. Listen for air leaks while doing this.
• Warning Light and Buzzer – Pump down on the brake pedal until the warning light and buzzer comes on. This is typically at or before 60 PSI.
• Tractor/Trailer Protection Valve Pop Out – Pump down on the brake pedal until the tractor and trailer protection valves pop out, this will be between 20 and 40 PSI.
• The air pressure gauges should build to governor cut out.
• Your truck should have a fire extinguisher, three red reflective triangles and spare electrical fuses.
• Demonstrate both the heater and defroster are working properly.

Horns (Air Horn and City Horn)

• Blow both horns to make sure they are working.
• Check the left turn, right turn, four way flashers and high beams; also point these out on the dashboard.
• Make sure transmission is in neutral and then fully depress the clutch. Turn the key on, check the ABS light, announce when it comes on and off, and start the engine.
• The seat belt should not be ripped or frayed and should adjust and latch properly.
• The engine oil pressure gauge should rise to normal operating range.
• Trailer Parking Brakes – Set the trailer brake, release the tractor brake, then tug lightly on the trailer.
• Tractor Parking Brakes – Set the tractor brake, release the trailer brake and tug lightly on the trailer.
• Release both the tractor and trailer brakes. Drive at idle speed. Apply the service brake to make sure you come to a complete stop and that it doesn’t pull to the left or right when applying the brakes.
• The voltmeter should be charging between 13 and 14 volts.
• The water temperature gauge should also rise to normal operating range.
• The windshield and mirrors must be clean, with no obstructions and in proper adjustment.
• Demonstrate the wipers and washers are working properly by spraying the windshield.

Back to top of In-Cab Inspection and Brake Tests

During a CDL pre-trip inspection, truckers inspect many aspects of their commercial vehicle, including the overall safety of the vehicle; major hoses, fluid levels, and vehicle belts; the clutch or gear shift; and emergency equipment. The driver demonstrates their knowledge by walking around the vehicle, checking various safety components and explaining why each part should be checked for safety.

Reference and practice tests:

• Printable Pre Trip Inspection Checklist (PDF)
• CDL General Knowledge Practice Test
• Pre Trip Inspection Practice Test
• CDL HAZMAT Endorsement Practice Test

Edited for 2024 on  12/5/23

• OTR Flatbed Company
• OTR Van Company
• Regional/Dedicated Van Company
• OTR Heavy Haul Company
• OTR Flatbed Lease
• OTR Van Lease
• Regional/Dedicated Van Lease
• OTR Heavy Haul Lease
• Owner-Operator
• Career Path
• Available Positions
• Hiring Areas
• Job Matcher
• Learning Center

«  View All Posts

The Importance of Class A CDL Pre-Trip Inspections

May 20th, 2022

Kelli Bloom

Kelli has been in the trucking industry since 2003. She got her start working in compliance for a trucking carrier that specialized in government freight. She has been the compliance manager with ATS since 2017.

Ahh, the despised pre-trip inspection. 

Most drivers dislike them. Many overlook them completely. 

Despite how much drivers dislike the pre-trip inspection they have to do every day, it’s an integral part of the job. A pre-trip inspection can be the difference between filling up a tire before you start driving or having a blowout on the road and potentially causing a dangerous accident.

A good pre-trip can also mean the difference between passing a Department of Transportation (DOT) inspection at a weigh station or receiving compliance, safety and accountability (CSA) points . 

Just 15 minutes of your day can help prevent major accidents and prevent yourself from receiving safety points that can impact your standing at your trucking company.  

So why are so many drivers rushing through them or skipping them altogether? 

As one of the members of the safety team at Anderson Trucking Service (ATS), my role is to ensure our drivers are following safe practices to not only keep themselves safe but to ensure the safety of the motoring public. 

I’ll explain why pre-trip inspections are so important, how often you need to be doing them and what can happen if you skip them. 

When you finish reading, you’ll not only understand why you should never skip a pre-trip inspection, but you’ll also have a list of everything you need to check during your pre-trip. 

Who Requires A Pre-Trip Inspection? 

Pre-trip inspections are required by the Federal Motor Carrier Safety Association (FMCSA).  

A pre-trip inspection consists of checking your truck and trailer to ensure it’s road-worthy and in good working order before you start driving. 

A thorough pre-trip inspection should take between 10 and 15 minutes — if not longer as a new driver. 

How Often Do I Need to Do a Class A CDL Pre-Trip Inspection? 

You should do a pre-trip inspection before any wheel movement after you’ve been off duty. For example, if you’ve taken your 10-hour break, you need to do a pre-trip inspection before you start driving. If you stop at a truck stop to grab fuel and a quick meal, you don’t need to do a pre-trip inspection. (However, a quick look at the truck and your securements is recommended.) 

That means every day you’re out on the road and moving, you should be doing a pre-trip inspection. Sometimes you might do more than one in a day. For instance, you may choose to do a split sleeper, where you split your 10 consecutive hours of off-duty time into two shifts. If you’re off-duty for three hours or more, you need to do a pre-trip before you start driving again. 

You’re also required to do a post-trip inspection when you stop for the day to look things over and see if you should have anything fixed. Because you’re checking it out before your 10-hour break, you have some time to get it fixed before you plan to be back on duty. 

The Consequences of Skipping a Pre-Trip Inspection

Pre-trip inspections are absolutely crucial, not just because they’re required by the FMCSA, but because they can prevent accidents, expensive roadside repairs or tows and CSA points. 

Doing pre-trip inspections helps you catch a lot of potential problems before you encounter them on the road. There are minor things you can catch, like low windshield wiper fluid, and then there are major issues, like a low tire or a problem with the engine. 

Imagine blowing a tire on the road or losing your brakes. That has the potential to cause a major accident. Even if no one is driving around you when it happens, you could get hurt and your truck could suffer major damage. If you do happen to cause an accident on the road and you didn’t do a pre-trip inspection, there may be unforeseen consequences. 

Failing to do a pre-trip inspection can also lead to a costly roadside repair. There’s an issue you may encounter on the road that could’ve been prevented had you completed your pre-trip. If you have to pull over, you may need to wait hours on the side of the road for a road service repair technician or a tow. You’ll be paying a set roadside fee for the service, an hourly rate for the technician to drive to and from your location and mileage. Due to labor shortages arising since the pandemic, you may be waiting hours on the side of the road.

Not only will it eat a hole in your pocket, but it’ll also eat away at your clock. You have to remain on duty even when you’re parked on the side of the road. Not only that but parking on the side of the road also increases your risk of becoming involved in a crash/getting hit. All of this can be prevented if you do your pre-trip and fix any issues before getting on the road.

Drivers who are caught skipping their pre-trip inspection will get CSA points. Failing to conduct an inspection results in a four-point violation. To give you some perspective, the highest violation you can get results in 10 points, so a pre-trip inspection violation carries some weight. 

Those CSA points will follow you for three years and they’ll show up on your pre-employment screening . Companies review this before hiring you and if your CSA points are too high, you could fall outside their hiring guidelines. 

You might be wondering how you can get caught by DOT inspectors. If you get pulled over at a DOT-operated weigh station, they’ll review your electronic logs. You should log your pre-trip inspections as on duty. If you’ve only logged a couple of minutes, they know you didn’t do a proper inspection. 

You may also get hit with additional CSA points for maintenance issues on your truck. Each violation usually ranges in CSA points from two to six points. If you have a brake light out, you’ll get six points. If a marker light is out, it’s a two-point violation. Brake violations are four points. Issues with your tires can be upwards of 10 CSA points. 

The number of points rises with the severity of the issues found. While things sometimes do just happen, DOT inspectors have heard it all. Your light may very well have just gone out, but far too often lights are out because a driver didn’t inspect their truck before they started driving. You should always do a quick walk around every time you get in your truck to start driving. 

Pre-Trip Inspection Checklist 

There’s no particular order you need to check each of these items. You just need to make sure you’re checking everything. A good practice is to begin at the front of your vehicle and move around the vehicle from front to back and then back to front on the other side. You should start the truck, run it for a few minutes, shut it off and then start the inspection. 

Remember this checklist next time you’re doing your pre-trip. Essentially, if it holds air or fluid, check for leaks. Make sure all bolted-on items are properly mounted and secured. 

Front of Vehicle

• Lights: All lights should be intact, not damaged and functioning properly. This includes high beams, headlights, exterior maker lights and turn signals. 
• Leaks: Look for signs of leaking fluid, such as puddles under or near the truck. 
• Lean: Ensure the truck isn’t leaning left or right. It should sit level.

Engine Compartment

• Fluid Levels: Check oil, coolant levels, power steering levels and windshield washer fluid. 
• Air and Water Hoses: Check for any leaking and listen for air leaks from hoses. 
• Alternator Belt/Wires: Ensure there are no cracks, splits or excess play. It should be tight and in good condition. 
• Steering Linkage/Components: Look for excess play at the joint. Follow the link of components from the steering wheel to the tires and make sure everything is in good condition. 
• Steer Axle: Look at leak springs and airbags (if it’s equipped with them). Look at the shocks and shock absorbers to ensure they’re attached and not leaking. Look at the front axles and brake pads and make sure they’re the proper thickness with no cracks. 
• Wheel Assembly: Look at the rims to make sure they’re in good condition. Make sure the lug nuts and hub caps are in place and not loose. The tires should be properly inflated, in good condition and have the proper tread depth. Go around the entire vehicle and check every truck for those three variables.

Driver Side/Fuel Area

• Door and Mirror: Make sure they’re functioning properly, they aren’t damaged and they latch in place. 
• Fuel Tank: Ensure the cap and seal are in place and no diesel is leaking out. 
• Catwalk/Steps: Ensure the catwalk is attached to the vehicle and is intact. 
• Lights: Make sure the turn signals on the side of the truck are working. 

Under Vehicle

• Drive Shaft: Make sure there is no excess play and the overall condition is good. 
• Exhaust: Make sure there are no holes in the exhaust system.
• Frame: Check for any bends or cracks that could indicate bigger issues.
• Drive Axles: Check the suspension, airbags brakes and wheel assembly again to ensure everything looks to be in good working order from a different angle.

Rear of Vehicle

• Mudflaps: These should be in place and have reflectors on them. 
• Lights: Ensure your brake lights, turn signals and marker lights are working.

Coupling System 

• Air/Electrical Lines: Make sure the air lines and electrical lines are connected from the back of the truck to the trailer. Listen for leaks and ensure the glad hand seals are in good condition. 
• Fifth Wheel: Make sure the fifth wheel is attached to the trailer, the lock arm is in the locked position and the lock pins are wrapped around the kingpin. 

Trailer 

• Headboard: If your trailer is equipped with one, make sure the headboard is in good condition. 
• Front Lights/Reflectors: Make sure the lights work and are the proper color.
• Landing Gear: Ensure your landing gear is in good condition and functioning properly. It should properly lower and raise when turned. 
• Cross Members: Horizontal floor supports should be in position and not damaged.
• Side Lights/Reflectors: Lights should be in place, undamaged and functioning properly. 
• Tandem Slide/Release Arm: If equipped, make sure they’re in place and properly locked to the trailer. 
• Trailer Axle: Check the trailer axles and look at the suspension and airbags to ensure everything is in good working order. Check the brakes, wheel assembly and tires. 
• Back of Trailer: If you’re driving a van, make sure the door closes and latches properly. Check the mudflaps on the trailer as well as the rearmost lights, brake lights, turn signals and marker lights.
• Seat Belt: Make sure the seat belt works properly. 
• Safety Equipment: Make sure you have all the safety equipment you need and that it’s working. This includes a fire extinguisher, emergency triangles and an extra set of fuses. 
• Heater/Defroster: Make sure both the heat and cooling systems work. 
• Wipers: Make sure the wipers are in good condition and functioning and that you have washer fluid. 
• Turn Signal Indicators: Ensure your turn signals are functioning both inside and outside the vehicle.
• ABS Light: Make sure the ABS light comes on during engine start-up and then goes off once the vehicle is running. 
• Gauges: Check oil, air and water gauges to ensure they’re in the proper range or voltage. 
• Horn: Make sure the city horn and air horn function. 
• All Glass: Make sure your windshield and mirrors are clean and free of cracks. 

Three-Step Air Brake Test 

You should ensure that your brakes are always in adjustment. You can do this with a three-step air brake test. Once the vehicle is at full air capacity, turn it off. Then, turn the ignition to the on position, press the brake and release both parking brakes. Hold the brake for one minute and watch the air gauges to make sure they hold the proper pressure. If pressure continues to decrease, you have a leak. It should hold steady pressure. 

Once you confirm you aren’t losing more than four pounds of pressure in a minute, fan the brakes to 60 PSI. Continue pumping the brakes until you see both brake valves pop at about 20 PSI. 

You should complete 10 full brake applications while your truck is parked. 

Prevent Accidents 

It can be tempting to skip out on pre-trip inspections or to speed through them, but doing so is not only against FMCSA regulations, it’s also incredibly unsafe. 

The more you do these inspections, the more familiar they’ll become to you. It’ll become habit and you’ll know what you’re looking for. They may become easier for you and you may be able to do them a bit quicker than you could previously. 

When you catch a light that’s out or a low tire, you’ll be happy you took the time to check your truck. You’ll also be doing your part to help reduce accidents on the road. 

These safe driving practices can also help you prevent accidents out on the road. 

CDL Pre-trip Inspection Quiz

Can you pass this "CDL Pre-Trip Inspection Quiz" with a good score? For you to become or keep being a commercial driver, there is a couple of tests that you must take to ensure that you are well capable of carrying out your job with minimal accidents. Are you getting ready for the CDL pre-trip inspection? The quiz below is perfect for helping you know what to expect. Give it a try! Best of luck to you!

WHAT STRUCTURE (THAT SUPPORTS THE FIFTH WHEEL SKID PLATE) SHOULD BE CHECKED FOR CRACKS OR BREAKS?

SLIDING PINTLE

Rate this question:

WHAT IS BEING INSPECTED WHEN YOU PUMP THE PEDAL THREE TIMES AND HOLD IT DOWN FOR FIVE SECONDS, MAKING SURE THAT THE PEDAL SHOULD NOT MOVE DURING THE FIVE SECONDS?

HYDRAULIC BRAKE

PARKING BRAKE

ALL OF THE ABOVE

WHAT TRANSMITS POWER FROM THE TRANSMISSION TO THE DRIVE AXLE?

STEERING PLAY

POWER STEERING BELT

AIR COMPRESSOR BELT

WHAT CARRIES AIR OR HYDRAULIC FLUID TO THE WHEEL BRAKE ASSEMBLY?

BRAKE HOSES/LINE

BRAKE LININGS

SLACK ADJUSTERS

BRAKE CHAMBERS

WHAT IS THE SLIDING MECHANISM AND LOCKING DEVICE FOR TANDEM AXLES ON TRAILERS?

TANDEM RELEASE (ARM/LOCKING PIN).

SUSPENSION SYSTEM

LANDING GEAR

WHAT DO YOU INSPECT TO MAKE SURE ALL ARE PRESENT, FREE OF CRACKS AND DISTORTIONS, AND SHOW NO SIGNS OF LOOSENESS SUCH AS RUST TRAILS OR SHINY THREADS?

NONE OF THE ABOVE

WHAT SHOULD YOU MAKE SURE IS SECURED, CAP(S) ARE ON TIGHT, AND HAS NO LEAKS FROM THE TANK(S) OR LINES?

BATTERY/BOX

AIR COMPRESSOR

WHAT SHOULD YOU CHECK SO THAT IT IS SOLID, CLEAR OF OBJECTS, AND SECURELY BOLTED TO THE TRACTOR FRAME?

What maintains air pressure in the air brake system.

AIR COMPRESSOR/BELT

ALTERNATOR/BELT

POWER STEERING/BELT

WATER PUMP/BELT

THERE SHOULD BE A MINIMUM TREAD DEPTH OF 4/32 OF AN INCH FOR THE:

STEERING AXLE TIRES

SPARE TIRES

NON-DRIVE AXLE TIRES

WHICH OF THE FOLLOWING DISENGAGES THE ENGINE FROM THE DRIVE TRAIN SO THE VEHICLE WON'T MOVE AND REDUCES THE LOAD ON STARTING THE MOTOR?

CLUTCH/GEARSHIFT

WHAT IS THE CONTAINER (HOSES) FOR THE MECHANISM THAT TRANSFORMS STEERING COLUMN ACTION INTO WHEELS ACTION?

STEERING LINKAGE

STEERING BOX/HOSES

WHAT ARE YOU INSPECTING BY MAKING SURE THAT HOSES AND LINES ARE NOT CUT, CHAFED, SPLICED, WORN, AND NOT TANGLED, PINCHED, OR DRAGGED AGAINST TRACTOR PARTS?

AIR/ELECTRIC LINES

LOCKING JAWS

DOORS/TIES/LIFTS

SPLASH GUARDS

IF LOOKING FOR PUDDLES ON THE GROUND, DRIPPING FLUIDS ON THE UNDERSIDE OF THE ENGINE AND TRANSMISSION, YOU WOULD BE LOOKING FOR:

POWER STEERING FLUID

WHAT SHOULD BE FULLY ENGAGED, WITH NO LOOSE OR MISSING PINS IN THE SLIDE MECHANISM OF THE SLIDING FIFTH WHEEL?

LOCKING PINS

TO IMPROVE VISIBILITY DURING INCLEMENT WEATHER, WHAT MUST BE SECURE, NOT DAMAGED, AND OPERATING SMOOTHLY AND CORRECTLY?

LIGHTING INDICATORS

HEATER/DEFROSTER

WIPERS/WASHERS

EMERGENCY EQUIPMENT

TO CHECK THE COOLANT LEVEL:

YOU WOULD INSPECT THE RESERVOIR SIGHT GLASS

REMOVE THE RADIATOR CAP AND CHECK THE LEVEL OF VISIBLE

CHECK THE DIPSTICK

EITHER A OR B

WHAT SHOULD BE CLEAN WITH NO ILLEGAL STICKERS, OBSTRUCTIONS, OR DAMAGES TO THE GLASS?

What is the brackets, bolt, or bushings that are used to attach spring and/or airbag to the axle and vehicle frame.

SHOCK ABSORBERS

SPRING MOUNTS

MOUNTING BOLTS

IF THE WHEEL HAS A SIGHT GLASS, CHECK THAT THE OIL LEVEL IS ADEQUATE OTHERWISE, LOOK FOR LEAKS AROUND THE:

HYDRAULIC BRAKES

HUB OIL/AXLE SEALS

WHAT RELEASES THE FIFTH WHEEL LOCKING JAWS SO THE TRAILER CAN BE COUPLED? (YOU SHOULD MAKE SURE IT IS IN THE ENGAGE POSITION AND THE SAFETY LATCH IS IN PLACE).

RELEASE ARM

IF WORN, WHAT CAN CAUSE EXCESSIVE HEAT BUILDUP FROM THE REDUCED ABILITY TO ABSORB AND DISSIPATE HEAT, POSSIBLE LEADING TO LOSS OF BRAKE RESPONSE?

BRAKE DRUM/LININGS

BRAKE HOSES/LINES

WHAT GAUGE INDICATES THE ALTERNATOR AND/OR GENERATOR IS CHANGING?

AMMETER/VOLTMETER

TEMPERATURE

OIL PRESSURE

WHAT SHOULD NOT BE BENT, DAMAGED, OR RUSTED THROUGH AND SHOULD BE EVENLY CENTERED WITH THE DUAL WHEELS AND TIRES EVENLY SEPARATED?

Quiz Review Timeline +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

• Current Version
• Jul 31, 2023 Quiz Edited by ProProfs Editorial Team
• Sep 09, 2009 Quiz Created by Susie04

Related Topics

• Bus Driving Test
• Transportation

Recent Quizzes

Featured Quizzes

Popular Topics

• Motorcycle Test Quizzes
• Practice Permit Test Quizzes
• Road Sign Quizzes
• Traffic Sign Quizzes

Related Quizzes

Wait! Here's an interesting quiz for you.