CDL Practice Tests: Pre-Trip Inspection

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Question #509 (1 of 10)

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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 three times and watch the hydraulic pressure gauge to make sure it's building pressure
  • 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

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.
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Question #512 (2 of 10)

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When doing an emergency system check on air brake systems, how do you begin the test?

  • Turn off the electrical power and begin fanning off the air pressure by pulling out the red parking brake knob
  • Turn the engine on and begin fanning off the air pressure by rapidly applying and releasing the foot brake
  • Turn electrical power on and begin fanning off the air pressure by rapidly applying and releasing the foot brake
  • Turn electrical power off and begin fanning off the air pressure by rapidly applying and releasing the foot brake
Emergency System Check. Turn electrical power on and begin fanning off the air pressure by rapidly applying and releasing the foot brake. Low air warning devices (buzzer, light, other) should activate before air pressure drops below 60 psi. Continue to fan off the air pressure. Normally within the range of 20-45 psi on a tractor-trailer combination vehicle, the tractor parking valve and parking brake valve should close (pop out). On other combination vehicle types and single vehicle types, the parking brake valve should close (pop out).
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Question #528 (3 of 10)

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In addition to checking the lighting indicators listed in Section 10.2 of this manual, school bus drivers must also check which of the following lighting indicators:

  • Strobe light indicator, if equipped.
  • All these are correct
  • Alternately flashing red lights indicator.
  • Alternately flashing amber lights indicator, if equipped.

In addition to checking the lighting indicators listed in Section 10.2 of this manual, school bus drivers must also check the following lighting indicators (internal panel lights):

  • Alternately flashing amber lights indicator, if equipped.
  • Alternately flashing red lights indicator.
  • Strobe light indicator, if equipped.
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Question #520 (4 of 10)

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What should you check for on drum brakes during a pre-trip inspection?

  • Brake linings (where visible) should not be worn dangerously thin.
  • Check for cracks, dents or holes. Also check for loose or missing bolts.
  • Check for contaminates, such as debris or oil/grease.
  • All these are correct

Drum Brake

  • Check for cracks, dents or holes. Also check for loose or missing bolts.
  • Check for contaminates, such as debris or oil/grease.
  • Brake linings (where visible) should not be worn dangerously thin.
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Question #503 (5 of 10)

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When doing a pre-trip inspection of the engine compartment, which of the following are you NOT looking for?

  • Look for dripping fluids on the underside of the engine and transmission.
  • Make sure the air lines are properly attached to the trailer
  • Look for puddles on the ground.
  • Inspect hoses for condition and leaks.

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.
The air lines do not connect to the trailer inside the engine compartment.
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Question #504 (6 of 10)

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Which of the following is NOT one of the belts you will check during a pre-trip inspection of the engine compartment?

  • Camshaft belt
  • Water pump belt
  • Power steering belt
  • Alternator belt

Check the following belts for snugness (up to 1/4-inch play at center of belt), cracks or frays:

  • Power steering belt.
  • Water pump belt.
  • Alternator belt.
  • Air compressor belt.
The camshaft is inside the engine and does not have a belt you can see or check.
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Question #515 (7 of 10)

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Describe the proper service brake check:

  • While sitting still, release the parking brake and pump the service brake 5 times, then release it. Make sure the pressure does not drop more than 3 psi in one minute
  • Pull forward at 5 mph, apply the emergency brake and stop. Check to see that the vehicle does not pull to either side and that it stops when the emergency brake is applied
  • Pull forward at 5 mph, apply the service brake and stop. Check to see that the vehicle does not pull to either side and that it stops when the brake is applied
  • All of these are correct

Service Brake Check

  • You will be required to check the application of air or hydraulic service brakes. This procedure is designed to determine that the brakes are working correctly and that the vehicle does not pull to one side or the other.
  • Pull forward at 5 mph, apply the service brake and stop. Check to see that the vehicle does not pull to either side and that it stops when the brake is applied.
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Question #529 (8 of 10)

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When inspecting the air and electrical connections to the trailer, which of the following items does NOT need to be checked?

  • Make sure the trailer electrical plug is firmly seated and locked in place.
  • Make sure the brake fluid lines are properly attached and not leaking
  • 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.

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.
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Question #508 (9 of 10)

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Which is the proper procedure for checking the trailer parking brakes?

  • Measure the distance between the parking brake shoe and the drum. Make sure it is less than 1 inch
  • Check the angle of the S-cam coming out of the brake chamber
  • All these are correct
  • Gently trying to pull forward with the trailer parking brake on
Trailer (if applicable): With the tractor parking brake released and the trailer parking brake engaged (combination vehicles only), check that the trailer parking brake will hold the vehicle by gently trying to pull forward with the trailer parking brake on.
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Question #502 (10 of 10)

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During the pre-trip inspection test you must:

  • Walk around the vehicle and point to or touch each item
  • Show that the vehicle is safe to drive
  • Explain to the examiner what you are checking and why
  • All these are correct
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. At the time of your test, the examiner will direct you to the areas of the vehicle to inspect for the test. In addition to this section, you should also review Section 2 prior to conducting the pre-trip inspection.
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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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