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Pre-Trip Inspection Free CDL Practice Tests
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Prepare For The Pre-Trip Inspection Portion Of Your CDL Written Exams

Pre-Trip Inspection Questions

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All of the following are part of the acceptable tire inspection process except:
  • Kick the tires to check for proper inflation
  • Check for mis-matched tires
  • Check for minimum tire tread depth
  • Use a mallet or tire gauge to check tires for proper inflation
Click here to look up the answer

From The CDL Manual

Tires:

The following items must be inspected on every tire:

  • Tread depth: Check for minimum tread depth (4/32 on steering axle tires and 2/32 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 a mallet. Note: You will not get credit if you simply kick the tires to check for proper inflation.
  • That there is no mismatch tires (size and construction).
  • Re-grooved or re-capped tires not permitted on bus steer tires.
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Shiny threads or rust trails on lug nuts could indicate:
  • Leaking fluids
  • Low air pressure
  • Damaged valve stems
  • Loose lug nuts
Click here to look up the answer

From The 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.

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Pedals should be checked for which of the following?
  • These are all things that should be noted
  • Grooved surface and good pedal pad
  • The pedal is in proper working order
  • Obstructions around or under the pedals
Click here to look up the answer

From The CDL Manual

Pedals:

  • Check for obstructions under or around the floor pedals.
  • Check for good pedal pad or grooved surface.
  • Check for proper pedal working order.
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The battery and box and cover must be secure, generally free of corrosion, and:
  • Connections should be easily removeable
  • Painted bright orange
  • End caps should be removed
  • Connections tight, and end caps present
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From The CDL Manual

Battery/Box

  • Wherever located, see that battery(s) are secure, connections are tight and cell caps are present.
  • Battery connections should not show signs of excessive corrosion.
  • Battery box and cover or door must be secure.
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Exterior items on the side of the vehicle that are to be inspected include all of the following except:
  • Drive shaft
  • Low air pressure gauge
  • Frame
  • Fuel tank
Click here to look up the answer

From The CDL Manual

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The rear of the truck must be inspected for:
  • You should be prepared to check and explain all of these things
  • All straps, ties, binders and chains must be secure
  • Damage and proper operation of all doors
  • Cargo lift must be in working order, and physically sound
Click here to look up the answer

From The CDL Manual

Doors/Ties/Lifts:

  • Check that doors and hinges are not damaged and that they open, close and latch properly from the outside, if equipped.
  • Ties, straps, chains and binders must also be secure.
  • If equipped with a cargo lift, look for leaking, damaged or missing parts and explain how it should be checked for correct operation.
  • Lift must be fully retracted and latched securely.
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Are and electrical lines should not be physically damaged or worn, and also:
  • You should be able to hear leaking air
  • Should be the correct color
  • Checked to be sure steel braid is showing through
  • Should not be leaking, pinched, dragging, or tangled
Click here to look up the answer

From The CDL Manual

Air/Electric Lines:

  • Listen for air leaks. Check that air hoses and electrical lines are not cut, chafed, spliced or worn (steel braid should not show through).
  • Make sure air and electrical lines are not tangled, pinched or dragging against tractor parts.
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You must check the coupling devices for general damage, missing parts, and functionality of all of these except:
  • Fifth wheel skid plate
  • Locking jaws
  • Mounting bolts
  • All of these should be inspected
Click here to look up the answer

From The CDL Manual

Mounting Bolts:

Look for loose or missing mounting brackets, clamps, bolts or nuts. Both the fifth wheel and the slide mounting must be solidly attached.

On other types of coupling systems (i.e., ball hitch, pintle hook, etc.), inspect all coupling components and mounting brackets for missing or broken parts.

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.

Fifth Wheel Skid Plate:

Check for proper lubrication and that fifth wheel skid plate is securely mounted to the platform and that all bolts and pins are secure and not missing.

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Locking jaws should be:
  • Fully opened around the kingpin
  • Fully closed around the kingpin
  • Unlubricated
  • Completely left out of the pre-trip inspection
Click here to look up the answer

From The 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.

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The fifth wheel skid plate should be checked for proper securement and:
  • Cleanliness
  • Lubrication
  • Hardness
  • Thickness
Click here to look up the answer

From The CDL Manual

Fifth Wheel Skid Plate:

Check for proper lubrication and that fifth wheel skid plate is securely mounted to the platform and that all bolts and pins are secure and not missing.

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