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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!

Locking Jaws on a fifth wheel should be fully closed around what part of the trailer?
  • Kingpin
  • Securing Hook
  • Tandem
  • Crossbeam
This is a question from page 84 - click here to look up the answer

Quote From Page 120 Of The Illinois CDL Manual:

Locking jaws:

  • Look into fifth wheel gap and check that locking jaws are fully closed around the kingpin.
  • On other types of coupling systems (i.e., ball hitch, pintle, hook, etc.), inspect the locking mechanism for missing or broken parts and make sure it is locked securely. If present, safety cables or chains must be secure and free of kinks and excessive slack.

TruckingTruth's Advice:

While inspecting the fifth wheel locking jaws, tell the examiner:

"I need to make sure the locking jaw is fully engaged and that the fifth wheel is positioned properly so that the tractor frame will clear the landing gear during turns."

Next
The three required safety items all commercial vehicles must have are:
  • Spare electrical fuses, three red reflective triangles, fire extinguisher
  • Road flares, reflective safety vest, fire extinguisher
  • First aid kit, road flares, fire extinguisher
  • CB radio, spare light bulbs, first aid kit
This is a question from page 81 - click here to look up the answer

Quote From Page 117 Of The Illinois CDL Manual:

Emergency equipment:

  • Check for spare electrical fuses.
  • Check for three red reflective triangles.
  • Check for a properly charged and rated fire extinguisher.

TruckingTruth's Advice:

Be sure to memorize all of the required safety equipment and know where the equipment is located so you can show the examiner.

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Next
When checking the mirrors and windshield, what should you look for?
  • No obstructions
  • Clean and properly adjusted
  • No damage
  • You should look for all of these things
This is a question from page 81 - click here to look up the answer

Quote From Page 117 Of The Illinois CDL Manual:

Mirrors and windshield:

  • Mirrors should be clean and adjusted properly from the inside.
  • Windshield should be clean with no illegal stickers, no obstructions or damage to the glass.

TruckingTruth's Advice:

What to tell the examiner:

There are no cracks, breaks, or obstructions in the windshield or mirrors and the the mirror and windshield are clean and properly adjusted.

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Next
How can you tell if there is a leak in your exhaust system?
  • A loose fitting may cause a leak
  • There will be rust visible in a particular spot
  • All of these can be signs of an exhaust leak
  • There will be carbon soot collected into one area of the pipe
This is a question from page 84 - click here to look up the answer

Quote From Page 119 Of The Illinois CDL Manual:

Exhaust system:

  • Check system for damage and signs of leaks such as rust or carbon soot.
  • System should be connected tightly and mounted securely.

TruckingTruth's Advice:

While inspecting the exhaust system, tell the examiner:

"The exhaust should be properly mounted and secured, no loose clamps, no signs of leaks such as rust or soot, and it must contain no holes, cracks, or dents."

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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
  • No, rims cannot have welding repairs
  • Yes, welding is allowed on rims
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
Do you need to test the horn during your pre-trip inspection?
  • Yes, but only the electric horn has to function properly
  • Yes, but only the air horn has to function properly
  • No, the horns do not need to be checked during a pre-trip inspection
  • 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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Next
When checking the coolant level during the pre-trip inspection, you should:
  • Only remove the radiator cap if the engine is hot
  • Never remove the radiator cap if the engine is hot
  • Be sure the coolant level is below the fill line
  • Take a sample of the coolant to check for foreign debris
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."

Prev
Next
Which part has couplings (u-joints) that need to be checked:
  • Fuel Tank
  • Drive Shaft
  • Air Lines
  • Fifth Wheel
This is a question from page 84 - click here to look up the answer

Quote From Page 119 Of The Illinois CDL Manual:

Drive shaft:

  • See that drive shaft is not bent or cracked.
  • Couplings should be secure and free of foreign objects.

TruckingTruth's Advice:

When inspecting the drive shaft, tell the examiner:

"The drive shaft should not be twisted, cracked, bent or broken. U-joints must appear secure and free of foreign objects."

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