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!

How much air loss is allowed in 1 minute on a single vehicle without any brakes being applied?
  • No more than 1 psi
  • No more than 3 psi
  • No more than 2 psi
  • No more than 4 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.

Next
Axle Seals can also be called:
  • Pipe seals
  • Rim oil seals
  • Hub oil seals
  • Drive seals
This is a question from page 83 - click here to look up the answer

Quote From Page 119 Of The Illinois CDL Manual:

Hub oil seals/axle seals:

Check that hub oil/grease seals and axle seals are not leaking and, if wheel has a sight glass, oil level is adequate.

TruckingTruth's Advice:

When checking an axle seal, tell the examiner:

"I'm checking the axle seal to make certain it is securely mounted, not damaged, and not leaking."

If a sight glass is present, say "I'm checking the sight glass to make sure the fluid is at the proper level."

Note: Not all axle seals have a sight glass.

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Next
Which statement about inspecting the steering box is incorrect?
  • Check for damaged hoses leading to the steering box
  • All of these answers are correct
  • Look for any missing nuts, bolts, and cotter pins
  • Make sure there is a small amount of steering fluid dripping from the bottom of the steering box
This is a question from page 83 - click here to look up the answer

Quote From Page 118 Of The Illinois CDL Manual:

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.

TruckingTruth's Advice:

After pointing out the steering box and hoses, tell the examiner:

"I am making sure the steering box is properly mounted and secured, not cracked bent or broken, and not leaking fluid. I'm also making sure all the hoses are not damaged or leaking."

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Next
How much air loss can occur in a combination vehicle in 1 minute with the service brakes applied?
  • No more than 2 psi
  • No more than 5 psi
  • No more than 3 psi
  • No more than 4 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.

Prev
Next
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.
  • Slack Adjusters
  • Brake Linings
  • Lug Nuts
  • Axle Seals
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."

Prev
Next
With a non-combination vehicle, how much air loss can occur in 1 minute with the service brake depressed?
  • No more than 5 psi
  • No more than 6 psi
  • No more than 3 psi
  • No more than 4 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.

Prev
Next
When inspecting the seats on a bus, you should:
  • Check that seat frames are firmly attached to the floor
  • Look for broken seat frames
  • Check that seat cushions are attached securely to the seat frames
  • All of these answers are correct
This is a question from page 85 - click here to look up the answer

Quote From Page 121 Of The Illinois CDL Manual:

Seating:

- Look for broken seat frames and check that seat frames are firmly attached to the floor.

- Check that seat cushions are attached securely to the seat frames.

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Next
Do you need to test the horn during your pre-trip inspection?
  • No, the horns do not need to be checked during a pre-trip inspection
  • Yes, but only the electric horn has to function properly
  • Yes, but only the air horn has to function properly
  • Yes, both the electric horn and the air horn must be shown to work properly
This is a question from page 81 - click here to look up the answer

Quote From Page 117 Of The Illinois CDL Manual:

Horn:
Check that air horn and/or electric horn work.

TruckingTruth's Advice:

While laws vary from state to state, when taking your pre-trip exam, you should demonstrate that both the city (electric) horn and the air horn function properly. As you're demonstrating, here's what to say:

"I am now checking the city horn and the air horn to be sure they are both properly functioning."

This is one thing that many people forget to do when taking the pre-trip exam. Don't forget the horns!

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