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CDL Practice Test: Pre-Trip Inspection

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CDL Practice Test: Pre-Trip Inspection

Pre-Trip Inspection Questions

Click On The Picture To Begin

Good Luck!

What is the proper order for checking the clutch and gearshift?
  • Depress the clutch, start the engine, move the gearshift lever into the neutral position, release the clutch slowly
  • Place gearshift lever in the neutral position, start the engine, then depress the clutch
  • Depress the clutch, place gearshift lever in the neutral position, start the engine and release the clutch slowly
  • Start the engine, depress the clutch, place gearshift lever into the neutral position, release clutch slowly
This is a question from page 81 - click here to look up the answer

Quote From Page 116 Of The Illinois CDL Manual:

Clutch/gearshift:

  • Depress clutch.
  • Place gearshift lever in neutral (or park, for automatic transmissions).
  • Start engine, then release clutch slowly.
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What is the minimum amount of tread depth allowed on a drive axle or trailer axle?
  • 2/32-inch
  • 1-inch
  • 4/32-inch
  • 1/2-inch
This is a question from page 83 - click here to look up the answer

Quote From Page 119 Of The Illinois CDL Manual:

Tires: The following items must be inspected on every tire:

  • Tread depth - Check for minimum tread depth (4/32-inch on steering axle tires, 2/32-inch 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 by striking tires with a mallet or other similar device.

TruckingTruth's Advice:

When checking a drive tire, tell the examiner:

"I'm checking the drive tire to make sure the tread is evenly worn and there are no abrasions, bulges, or cuts to the tread or sidewalls. The tread must have a minimum depth of 2/32 of an inch. The tires must be properly inflated according to factory specifications. I'm also making sure there is proper spacing between the dual tires and the space is free from foreign objects."

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Next
For school buses, what additional lighting indicators need to be inspected?
  • All of these are correct
  • Alternately flashing red lights indicator
  • Alternately flashing amber lights indicator, if equipped
  • Strobe light indicator, if equipped
This is a question from page 85 - click here to look up the answer

Quote From Page 120 Of The Illinois CDL Manual:

Lighting indicators: In addition to checking the lighting indicators listed in Section 10.2, school bus drivers also must 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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What part does the following inspection refer to: All are present, free of cracks and distortions, and show no signs of looseness such as rust trails or shiny threads.
  • Brake Linings
  • Axle Seals
  • Lug Nuts
  • Slack Adjusters
This is a question from page 83 - click here to look up the answer

Quote From Page 119 Of The Illinois CDL Manual:

Lug nuts:

  • Check that all lug nuts are present, free of cracks and distortions, and show no signs of looseness such as rust trails or shiny threads.
  • Make sure all bolt holes are not cracked or distorted.

TruckingTruth's Advice:

During the pre-trip exam, you'll want to mention the lug nuts for each wheel. You should say:

"All lug nuts are present, not loose, and there are no rust trails around the nuts or cracks around bolt holes."

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What happens if you forget to perform an air brake check on an air brake vehicle during the pre-trip inspection exam?
  • Performing an air brake inspection is voluntary
  • You will receive an automatic failure
  • You will be docked 25 points
  • You will be reminded of the oversight
This is a question from page 82 - click here to look up the answer

Quote From Page 117 Of The Illinois CDL Manual:

Air brake check (air brake-equipped vehicles only): Failure to perform an air brake check will result in an automatic failure of the Vehicle Inspection Test.

TruckingTruth's Advice:

If you forget to perform an air brake check, you will be automatically disqualified and will need to retest. Further, the air brake check must be performed in a very specific order. If any step is done improperly or if you forget any step, that will also be grounds for disqualification. The proper steps to checking an air brake system is as follows:

  • 1. With air pressure built up to 120 - 125 psi (fully charged system), depress the clutch and put the transmission into a low gear (keeping the transmission in gear will prevent the truck from rolling).
  • 2. Shut the engine off, but turn the key back to the "on" position (this will allow you to hear the low air pressure warning alarm later in the test).
  • 3. Release your foot off the clutch.
  • 4. Release both the yellow tractor parking brake and the red trailer parking brake if equipped (remember, the truck is in gear so you won't roll - stay off the service brakes).
  • 5. After air stabilizes (no sound of rushing air), fully apply the foot brake and hold it for one full minute (you can ask the examiner to time it for you). The system should not lose any more than 3 psi for a single vehicle and 4 psi for a combination vehicle in that minute. During this time, listen for any air leaks.
  • 6. Begin "fanning" off the air pressure by rapidly pushing and releasing the foot brake. The low air warning light and buzzer should activate before pressure drops below 60psi.
  • 7. Continue to fan the service brakes. At approximately 40 psi, the red tractor protection valve (trailer brakes) should pop out. Continue to fan off air pressure until the yellow tractor valve pops out (tractor brakes).
  • 8. Put the transmission into neutral, depress the clutch, and restart the truck.
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When checking the steering wheel, how much free play is allowed?
  • Play should not exceed 10 degrees
  • Play should not exceed 20 degrees
  • Play should not exceed 5 degrees
  • Play should not exceed 15 degrees
This is a question from page 81 - click here to look up the answer

Quote From Page 117 Of The Illinois CDL Manual:

Steering play:

  • Non-Power steering - Check for excessive play by turning steering wheel back and forth. Play should not exceed 10 degrees (or about 2 inches on a 20-inch wheel).
  • Power steering - With the engine running, check for excessive play by turning the steering wheel back and forth. Play should not exceed 10 degrees (or about 2 inches on a 20-inch wheel) before front left wheel barely moves.

TruckingTruth's Advice:

What to tell the examiner:

"The steering wheel has less than 10 degrees of free play, is not bent, broken, or cracked and is properly mounted and secured."

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How much air loss is allowed in 1 minute on a single vehicle without any brakes being applied?
  • No more than 4 psi
  • No more than 2 psi
  • No more than 1 psi
  • No more than 3 psi
This is a question from page 82 - click here to look up the answer

Quote From Page 117 Of The Illinois CDL Manual:

With the engine running, build the air pressure to governed cut-out (100-125 psi). Shut off the engine, turn the electrical power on, chock your wheels, if necessary, release the tractor protection valve and parking brake (push in), fully apply the foot brake and hold it for one minute. Check the air gauge to see if the air pressure drops more than 3 pounds in 1 minute (single vehicle) or 4 pounds in 1 minute (combination vehicle) with brake applied. When brake is unapplied, air pressure drops more than 2 pounds in 1 minute with a single vehicle and 3 pounds in 1 minute in a combination vehicle.

TruckingTruth's Advice:

Be sure to memorize how much air loss is acceptable when the service brakes are applied and not applied.

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Next
When inspecting suspension components, you must:
  • Check the components for every axle
  • Check the components on the trailer only
  • Checking suspension components is not required
  • Check the components on the tractor only
This is a question from page 83 - click here to look up the answer

Quote From Page 118 Of The Illinois CDL Manual:

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.

Mounts:

Look for cracked or broken spring hangers, missing or damaged bushings and broken, loose or missing bolts, Ubolts or other axle mounting parts. (The mounts should be checked at each point where they are secured to the vehicle frame and axle(s)).

Shock absorbers:

Check that shock absorbers are secure and that there are no leaks.

Note: Be prepared to perform the same suspension components inspection on every axle (power unit and trailer, if equipped).

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