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CDL Practice Test: Pre-Trip Inspection

These CDL practice questions are from our High Road Training Program, a CDL test preparation course designed to help you learn the CDL manual.

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CDL Practice Test: Pre-Trip Inspection

Pre-Trip Inspection Questions

Click On The Picture To Begin

Good Luck!

When checking the steering wheel, how much free play is allowed?
  • Play should not exceed 15 degrees
  • Play should not exceed 20 degrees
  • Play should not exceed 10 degrees
  • Play should not exceed 5 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."

Next
Which of the following statements is incorrect about inspecting the emergency exits on a coach bus?
  • They should open and close securely from the outside
  • All exits should operate smoothly
  • Make sure all emergency exits are not damaged
  • Check that any emergency exit warning devices are working
This is a question from page 87 - click here to look up the answer

Quote From Page 122 Of The Illinois CDL Manual:

Emergency exits:

- Make sure all emergency exits are not damaged, operate smoothly, and close securely from the inside.
- Check that any emergency exit warning devices are working.

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Next
When checking the coolant level during the pre-trip inspection, you should:
  • Be sure the coolant level is below the fill line
  • Take a sample of the coolant to check for foreign debris
  • Only remove the radiator cap if the engine is hot
  • Never remove the radiator cap if the engine is hot
This is a question from page 80 - click here to look up the answer

Quote From Page 116 Of The Illinois CDL Manual:

Oil level:

  • Indicate where dipstick is located.
  • See that oil level is within safe operating range. Level must be above refill mark.

TruckingTruth's Advice:

When checking the coolant level, tell the examiner:

"The coolant level is filled above the minimum level and the reservoir is not cracked, broken, or leaking."

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Next
Dash indicators must work when all of the following lights are turned on, except:
  • Fog lamps
  • Right Turn Signal
  • 4-way emergency flashers
  • High beam headlights
This is a question from page 81 - click here to look up the answer

Quote From Page 117 Of The Illinois CDL Manual:

Lighting indicators: Test that dash indicators work when corresponding lights are turned on:

  • Right turn signal
  • 4-way emergency flashers
  • High-beam headlights

TruckingTruth's Advice:

Be sure to demonstrate each lighting indicator on the dash and tell the examiner what you're doing. For example, while demonstrating, you should say:

"I am now checking the lighting indicators to be certain the dashboard lights function properly. The turn signal indicators work (while checking the turn signals), the 4-way emergency flashers indicator works (while checking the 4-way emergency flashers), and the high beam headlight indicator works properly."

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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 4 psi
  • No more than 3 psi
  • No more than 6 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
Can rims have welding repairs?
  • Yes, but any welds must be made by a certified mechanic
  • Yes, but the rim has to be replaced within 1 year of the weld being made
  • Yes, welding is allowed on rims
  • No, rims cannot have welding repairs
This is a question from page 83 - click here to look up the answer

Quote From Page 119 Of The Illinois CDL Manual:

Rims: Check for damaged or bent rims. Rims cannot have welding repairs.

TruckingTruth's Advice:

While inspecting a rim during your pre-trip exam, tell the examiner:

"I am checking the rim to make sure it is not cracked, bent, or broken and contains no welds."

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Next
When inspecting the seats on a bus, you should:
  • Look for broken seat frames
  • All of these answers are correct
  • Check that seat cushions are attached securely to the seat frames
  • Check that seat frames are firmly attached to the floor
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
When pulled by hand, how much should a brake rod move when the brakes are released?
  • No more than 1.5 inches
  • No more than 1 inch
  • No more than 1/2 inch
  • No more than 2 inches
This is a question from page 83 - click here to look up the answer

Quote From Page 118 Of The Illinois CDL Manual:

Slack adjusters:



       
  • Look for broken, loose or missing parts.

  •    
  • The angle between the push rod and adjustor arm should be a little over 90 degrees when the brakes are released and not less than 90 degrees when the brakes are applied.

  •    
  • When pulled by hand, the brake rod should not move more than 1 inch (with the brakes released).

  •    
  • The manual adjustment of automatic slack adjusters is dangerous because it gives the vehicle operator a false sense of security about the effectiveness of the braking system.

TruckingTruth's Advice:

While inspecting the slack adjuster and push rod, you should tell the examiner:

"I am now checking the slack adjuster and push rod to be sure they are properly mounted and secure, not cracked, bent, or broken. When the brakes are released and pulled by hand, the rod should not move more than approximately 1 inch."

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