CDL Practice Tests: Pre-Trip Inspection
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Go!When doing an emergency system check on air brake systems, how do you begin the test?
- Turn electrical power on and begin fanning off the air pressure by rapidly applying and releasing the foot brake
- Turn off the electrical power and begin fanning off the air pressure by pulling out the red parking brake knob
- Turn electrical power off and begin fanning off the air pressure by rapidly applying and releasing the foot brake
- Turn the engine on and begin fanning off the air pressure by rapidly applying and releasing the foot brake
What is the minimum tire tread depth allowed during a pre-trip inspection?
- 4/32 on trailer axle tires and 2/32 on all other tires
- 2/32 on steering axle tires and 4/32 on all other tires
- 4/32 on drive axle tires and 2/32 on all other tires
- 4/32 on steering axle tires and 2/32 on all other tires
The following items must be inspected on every tire:
- Tread depth: Check for minimum tread depth (4/32 on steering axle tires and 2/32 on all other tires).
- Tire condition: Check that tread is evenly worn and look for cuts or other damage to tread or sidewalls. Also, make sure that valve caps and stems are not missing, broken or damaged.
- Tire inflation: Check for proper inflation by using a tire gauge or a mallet. Note: You will not get credit if you simply kick the tires to check for proper inflation.
- That there is no mismatch tires (size and construction).
- Re-grooved or re-capped tires are not permitted on bus steer tires.
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.
What are two indications of loose lug nuts?
- All these are correct
- Rusty trails or shiny threads
- Twisted or bent valve stem and over-inflated tires
- Low hub oil level or brakes squeaking
When doing a pre-trip inspection of the engine compartment, which of the following are you NOT looking for?
- Make sure the air lines are properly attached to the trailer
- Inspect hoses for condition and leaks.
- Look for puddles on the ground.
- Look for dripping fluids on the underside of the engine and transmission.
Engine Compartment (Engine Off) Leaks/Hoses
- Look for puddles on the ground.
- Look for dripping fluids on underside of engine and transmission.
- Inspect hoses for condition and leaks.
Which is the proper procedure for checking hydraulic brakes?
- All these are correct
- 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.
- 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.
Re-grooved or re-capped tires are not permitted on:
- Steer tires
- Trailer tires
- Any tires
- Drive tires
The following items must be inspected on every tire:
- Tread depth: Check for minimum tread depth (4/32 on steering axle tires and 2/32 on all other tires).
- Tire condition: Check that tread is evenly worn and look for cuts or other damage to tread or sidewalls. Also, make sure that valve caps and stems are not missing, broken or damaged.
- Tire inflation: Check for proper inflation by using a tire gauge or a mallet. Note: You will not get credit if you simply kick the tires to check for proper inflation.
- That there is no mismatch tires (size and construction).
- Re-grooved or re-capped tires are not permitted on bus steer tires.
Which of the following is NOT one of the dash indicators you will look for during your pre-trip inspection?
- Air lines reversed indicator
- Four-way emergency flashers
- Left turn signal indicator
- Antilock Braking System (ABS) indicator
Test that dash indicators work when corresponding lights are turned on:
- Left turn signal
- Right turn signal.
- Four way emergency flashers.
- High-beam headlight.
- Antilock Braking System (ABS) indicator.
When doing an emergency system check on air brake systems, the tractor parking valve and the trailer parking valve should close (pop out) when the pressure gets below what reading?
- 60-80 psi
- 20-45 psi
- 10-30 psi
- 80 - 100 psi
What do you check for with the safety belt during a pre-trip inspection?
- The belt is not ripped or frayed
- The belt is securely mounted
- All these are correct
- The belt adjusts and latches properly
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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