CDL Practice Tests: Pre-Trip Inspection
Choose A Section:
Go!Which is the proper procedure for checking the trailer parking brakes?
- Gently trying to pull forward with the trailer parking brake on
- Check the angle of the S-cam coming out of the brake chamber
- All these are correct
- Measure the distance between the parking brake shoe and the drum. Make sure it is less than 1 inch
When inspecting the air and electrical connections to the trailer, which of the following items does NOT need to be checked?
- Check that trailer air connectors are sealed and in good condition.
- Make sure the brake fluid lines are properly attached and not leaking
- Make sure the trailer electrical plug is firmly seated and locked in place.
- Make sure glad hands are locked in place, free of damage and oil/grease that can cause air leaks.
Air/Electrical Connections
- Check that trailer air connectors are sealed and in good condition.
- Make sure glad hands are locked in place, free of damage and oil/grease that can cause air leaks.
- Make sure the trailer electrical plug is firmly seated and locked in place.
During the pre-trip inspection test you must:
- Show that the vehicle is safe to drive
- Walk around the vehicle and point to or touch each item
- All these are correct
- Explain to the examiner what you are checking and why
When checking the suspension components, what should you check for?
- Air ride suspension should be checked for damage and leaks.
- Look for missing, shifted, cracked or broken leaf springs.
- All these are correct
- Look for broken or distorted coil springs.
Suspension Springs/Air/Torque
- Look for missing, shifted, cracked or broken leaf springs.
- Look for broken or distorted coil springs.
- If vehicle is equipped with torsion bars, torque arms or other types of suspension components, check that they are not damaged and are mounted securely.
- Air ride suspension should be checked for damage and leaks.
Which is the proper procedure for checking hydraulic brakes?
- Hold the brake pedal down. Make sure the pedal slowly moves all the way to the floor within 10 seconds
- Pump the brake pedal three times and then hold it down for five seconds. The brake pedal should not move (depress) during the five seconds.
- All these are correct
- Pump the brake three times and watch the hydraulic pressure gauge to make sure it's building pressure
Hydraulic Brake Check (if equipped)
- Pump the brake pedal three times and then hold it down for five seconds. The brake pedal should not move (depress) during the five seconds.
- If equipped with a hydraulic brake reserve (back-up) system, with the key off, depress the brake pedal and listen for the sound of the reserve system electric motor.
- Check that the warning buzzer or light is off.
When checking the steering box components under the hood, what should you check for?
- Look for any missing nuts, bolts and cotter keys
- Check that the steering box is securely mounted and not leaking
- Check for power steering fluid leaks or damage to power steering hoses
- All these are correct
Steering Box/Hoses
- Check that the steering box is securely mounted and not leaking. Look for any missing nuts, bolts and cotter keys.
- Check for power steering fluid leaks or damage to power steering hoses.
What are two indications of loose lug nuts?
- Rusty trails or shiny threads
- Low hub oil level or brakes squeaking
- All these are correct
- Twisted or bent valve stem and over-inflated tires
When doing an air brake system leak check, how long do you hold the pedal and what do you check for?
- Hold the pedal for two minutes. Check the air gauge to see if the air pressure drops more than 1 pound in one minute (single vehicle) or 2 pounds in one minute (combination vehicle)
- Hold the pedal for 10 seconds. Check the air gauge to see if the air pressure drops more than 3 pounds in one minute (single vehicle) or 4 pounds in one minute (combination vehicle)
- Hold the pedal for one minute. Check the air gauge to see if the air pressure drops more than 6 pounds in one minute (single vehicle) or 8 pounds in one minute (combination vehicle)
- Hold the pedal for one minute. Check the air gauge to see if the air pressure drops more than 3 pounds in one minute (single vehicle) or 4 pounds in one minute (combination vehicle)
In addition to checking for spare electrical fuses (if equipped), three red reflective triangles and a properly charged and rated fire extinguisher, school bus drivers must also inspect which of the following emergency equipment?
- Emergency flares and flashlight
- First aid kit and body fluid cleanup kit
- None of these are correct
- Tool kit and tire patching kit
In addition to checking for spare electrical fuses (if equipped), three red reflective triangles and a properly charged and rated fire extinguisher, school bus drivers must also inspect the following emergency equipment:
- First Aid Emergency Kit
- Body Fluid Cleanup Kit
When doing an emergency system check on air brake systems, the low air warning device (buzzer, light, other) should activate when the pressure gets below what reading?
- 60 psi
- 100 psi
- 80 psi
- 140 psi
About The Pre-Trip Inspectin CDL Exam
The The Pre-Trip Inspectin portion of the CDL Exam is required to obtain your CDL. During the pre-trip inspection, you must show that the vehicle is safe to drive. You may have to walk around the vehicle and point to or touch each item and explain to the examiner what you are checking and why. You will NOT have to crawl under the hood or under the vehicle.
Drivers need to have knowledge of how the actual vehicle(s) that they are conducting the test in operate. The drivers need to be able to explain and demonstrate different checks for the examiner as requested.
Taking the CDL Pre-trip Inspection Test
Class A Pre-trip Inspection Test
If you are applying for a Class A CDL, you will be required to perform a pre-trip inspection in the vehicle you have brought with you for testing. The vehicle must be a combination vehicle, representative of the unit you will be driving and must meet the class weight requirements. If the vehicle is an air brake vehicle, you must first pass the air brake knowledge test. You also must have passed all applicable endorsement knowledge tests that pertain to the vehicle you bring in for testing. Your test will require an inspection of the areas of the vehicle as instructed by your CDL examiner.
Class B and C Pre-trip Inspection Test
If you are applying for a Class B or C CDL, you will be required to perform a pre-trip inspection in the vehicle you have brought with you for testing. The vehicle must be a straight truck, passenger bus or school bus, representative of the vehicle you will be driving and must meet the class weight requirements. If the vehicle is an air brake vehicle, you must first pass the air brake knowledge test. You also must have passed all applicable endorsement knowledge tests that pertain to the vehicle you bring in for testing. Your test will require an inspection of the areas of the vehicle as instructed by your CDL examiner.
TruckingTruth's Pre-Trip Inspection Study Guide
We have an excellent Pre-trip Inspection Study Guide which includes a complete pre-trip inspection with photos and descriptions, numerous pre-trip inspection videos, and a complete vehicle checklist.
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