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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!

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 air horn has to function properly
  • Yes, but only the electric 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!

Next
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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Next
For school buses, what additional lighting indicators need to be inspected?
  • Alternately flashing amber lights indicator, if equipped
  • Alternately flashing red lights indicator
  • Strobe light indicator, if equipped
  • All of these are correct
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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Next
During your pre-trip inspection, you must check the oil level and:
  • Show how to test the oil for water
  • Rub some oil between your fingers to make sure the oil is free of metal shards and foreign debris
  • Indicate where the dipstick is located
  • Demonstrate how to add oil to the engine
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:

What to say to the examiner:

"The dipstick should be pulled to show that the oil level is above the refill mark and in safe operating range."

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Next
What is the minimum amount of tread depth allowed on a drive axle or trailer axle?
  • 2/32-inch
  • 1/2-inch
  • 4/32-inch
  • 1-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
Which of these statements about checking the oil pressure gauge is correct?
  • After starting the engine, check that the pressure gauge shows declining oil pressure
  • The pressure gauge should show normal pressure immediately after engine start
  • None of these answers are correct
  • After starting the engine, check that the pressure gauge shows increasing oil pressure
This is a question from page 81 - click here to look up the answer

Quote From Page 117 Of The Illinois CDL Manual:

Oil pressure gauge:

  • Make sure oil pressure gauge is working.
  • Check that pressure gauge shows increasing or normal oil pressure or that the warning light goes off.
  • If equipped, oil temperature gauge should begin a gradual rise to the normal operating range.

TruckingTruth's Advice:

What to tell the examiner:

I'm checking the oil pressure gauge to make sure pressure is building to normal operating range.

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Next
Which statement about the air and electrical lines is FALSE:
  • Listen for air leaks
  • Make sure air and electrical lines are not tangled
  • Steel braid should not show through on the air or electrical lines
  • Make sure the air and electrical lines are dragging against the tractor cat-walk for additional support
This is a question from page 84 - click here to look up the answer

Quote From Page 120 Of The Illinois 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.

TruckingTruth's Advice:

You should say the following to the examiner for the air and electrical lines:

Air Lines: "The air lines are securely mounted to the tractor and trailer. The lines are secured to the trailer using glad hands and glad hand seals which are in good condition and not leaking air. They are not dragging on the cat walk, no leaks are present, and they are free of abrasions, bulges, or cuts."

Electrical Lines: "Electrical line is properly connected to the tractor and trailer, is not dragging on the cat walk, and has no cracked, frayed, or bare wires showing."

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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 6 psi
  • No more than 3 psi
  • No more than 4 psi
  • No more than 5 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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