Dashboard

Dashboard

Note: Your are not logged in. We can not keep your scores or track your progress unless you Register and Log In

Cab Check/Engine Start Oil Pressure Gauge (continued)

Pedals

  • Check for obstructions under or around the floor pedals.
  • Check for good pedal pad or grooved surface.
  • Check for proper pedal working order.

Horn

  • Check that air horn and/or electric horn work.

Heater/Defroster

  • Test that the heater and defroster work.

Parking Brake Check

  • Pulling Unit: With the parking brake engaged (trailer brakes released on combination vehicles), check that the parking brake will hold vehicle by gently trying to pull forward with the parking brake on.
  • Trailer (if applicable): With the tractor parking brake released and the trailer parking brake engaged (combination vehicles only), check that the trailer parking brake will hold the vehicle by gently trying to pull forward with the trailer parking brake on.

Hydraulic Brake Check (if equipped)

  • Pump the brake pedal three times and then hold it down for five seconds. The brake pedal should not move (depress) during the five seconds.
  • If equipped with a hydraulic brake reserve (back-up) system, with the key off, depress the brake pedal and listen for the sound of the reserve system electric motor.
  • Check that the warning buzzer or light is off.

Air Brake Check (Air Brake Equipped Vehicles Only)

Failure to perform all areas of the air brake check will result in an automatic failure of the pre-trip inspection test.

Air brake safety devices vary. However, this procedure will ensure that any safety device operates correctly as air pressure drops from normal to a low air condition.

For safety purposes, in areas where an incline is present, you will use wheel chocks during the air brake check. The proper procedures for inspecting the air brake system are as follows.

  • System Leak Check. With the air pressure built up to the governor cut-off (120-140 psi), shut off the engine, chock your wheels, (if necessary), release the tractor parking valve and trailer parking valve (combination vehicles), 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 one minute (single vehicle) or 4 pounds in one minute (combination vehicle).
  • Emergency System Check. Turn electrical power on and begin fanning off the air pressure by rapidly applying and releasing the foot brake. Low air warning devices (buzzer, light, other) should activate before air pressure drops below 60 psi. Continue to fan off the air pressure. Normally within the range of 20-45 psi on a tractor-trailer combination vehicle, the tractor parking valve and the trailer parking brake valve should close (pop out). On other combination vehicle types and single vehicle types, the parking brake valve should close (pop out).

Service Brake Check

  • You will be required to check the application of air or hydraulic service brakes. This procedure is designed to determine that the brakes are working correctly and that the vehicle does not pull to one side or the other.
  • Pull forward at 5 mph, apply the service brake and stop. Check to see that the vehicle does not pull to either side and that it stops when the brake is applied.

Safety Belt

  • Check that the safety belt is securely mounted, adjusts and latches properly, and is not ripped or frayed.

Multiple-Choice Questions:

Question #512 (1 of 9)

Give a brief explanation of the problem:

Optional: Leave your email address if you would like a reply:

Report Cancel

When doing an emergency system check on air brake systems, how do you begin the test?

  • Turn electrical power on and begin fanning off the air pressure by rapidly applying and releasing the foot brake
  • Turn electrical power off and begin fanning off the air pressure by rapidly applying and releasing the foot brake
  • Turn the engine on and begin fanning off the air pressure by rapidly applying and releasing the foot brake
  • Turn off the electrical power and begin fanning off the air pressure by pulling out the red parking brake knob
Emergency System Check. Turn electrical power on and begin fanning off the air pressure by rapidly applying and releasing the foot brake. Low air warning devices (buzzer, light, other) should activate before air pressure drops below 60 psi. Continue to fan off the air pressure. Normally within the range of 20-45 psi on a tractor-trailer combination vehicle, the tractor parking valve and parking brake valve should close (pop out). On other combination vehicle types and single vehicle types, the parking brake valve should close (pop out).
Next
Question #516 (2 of 9)

Give a brief explanation of the problem:

Optional: Leave your email address if you would like a reply:

Report Cancel

What do you check for with the safety belt during a pre-trip inspection?

  • The belt is not ripped or frayed
  • All these are correct
  • The belt adjusts and latches properly
  • The belt is securely mounted
Check that the safety belt is securely mounted, adjusts and latches properly, and is not ripped or frayed.
Previous Next
Question #514 (3 of 9)

Give a brief explanation of the problem:

Optional: Leave your email address if you would like a reply:

Report Cancel

When doing an emergency system check on air brake systems, the tractor parking valve and the trailer parking valve should close (pop out) when the pressure gets below what reading?

  • 60-80 psi
  • 10-30 psi
  • 80 - 100 psi
  • 20-45 psi
Emergency System Check. Turn electrical power on and begin fanning off the air pressure by rapidly applying and releasing the foot brake. Low air warning devices (buzzer, light, other) should activate before air pressure drops below 60 psi. Continue to fan off the air pressure. Normally within the range of 20-45 psi on a tractor-trailer combination vehicle, the tractor parking valve and the trailer parking valve should close (pop out). On other combination vehicle types and single vehicle types, the parking brake valve should close (pop out).
Previous Next
Question #513 (4 of 9)

Give a brief explanation of the problem:

Optional: Leave your email address if you would like a reply:

Report Cancel

When doing an emergency system check on air brake systems, the low air warning device (buzzer, light, other) should activate when the pressure gets below what reading?

  • 60 psi
  • 140 psi
  • 80 psi
  • 100 psi
Emergency System Check. Turn electrical power on and begin fanning off the air pressure by rapidly applying and releasing the foot brake. Low air warning devices (buzzer, light, other) should activate before air pressure drops below 60 psi. Continue to fan off the air pressure. Normally within the range of 20-45 psi on a tractor-trailer combination vehicle, the tractor parking valve, and parking brake valve should close (pop out). On other combination vehicle types and single vehicle types, the parking brake valve should close (pop out).
Previous Next
Question #515 (5 of 9)

Give a brief explanation of the problem:

Optional: Leave your email address if you would like a reply:

Report Cancel

Describe the proper service brake check:

  • All of these are correct
  • Pull forward at 5 mph, apply the emergency brake and stop. Check to see that the vehicle does not pull to either side and that it stops when the emergency brake is applied
  • While sitting still, release the parking brake and pump the service brake 5 times, then release it. Make sure the pressure does not drop more than 3 psi in one minute
  • Pull forward at 5 mph, apply the service brake and stop. Check to see that the vehicle does not pull to either side and that it stops when the brake is applied

Service Brake Check

  • You will be required to check the application of air or hydraulic service brakes. This procedure is designed to determine that the brakes are working correctly and that the vehicle does not pull to one side or the other.
  • Pull forward at 5 mph, apply the service brake and stop. Check to see that the vehicle does not pull to either side and that it stops when the brake is applied.
Previous Next
Question #509 (6 of 9)

Give a brief explanation of the problem:

Optional: Leave your email address if you would like a reply:

Report Cancel

Which is the proper procedure for checking hydraulic brakes?

  • Pump the brake pedal three times and then hold it down for five seconds. The brake pedal should not move (depress) during the five seconds.
  • Pump the brake three times and watch the hydraulic pressure gauge to make sure it's building pressure
  • All these are correct
  • Hold the brake pedal down. Make sure the pedal slowly moves all the way to the floor within 10 seconds

Hydraulic Brake Check (if equipped)

  • Pump the brake pedal three times and then hold it down for five seconds. The brake pedal should not move (depress) during the five seconds.
  • If equipped with a hydraulic brake reserve (back-up) system, with the key off, depress the brake pedal and listen for the sound of the reserve system electric motor.
  • Check that the warning buzzer or light is off.
Previous Next
Question #511 (7 of 9)

Give a brief explanation of the problem:

Optional: Leave your email address if you would like a reply:

Report Cancel

When doing an air brake system leak check, how long do you hold the pedal and what do you check for?

  • Hold the pedal for two minutes. Check the air gauge to see if the air pressure drops more than 1 pound in one minute (single vehicle) or 2 pounds in one minute (combination vehicle)
  • Hold the pedal for one minute. Check the air gauge to see if the air pressure drops more than 6 pounds in one minute (single vehicle) or 8 pounds in one minute (combination vehicle)
  • Hold the pedal for 10 seconds. Check the air gauge to see if the air pressure drops more than 3 pounds in one minute (single vehicle) or 4 pounds in one minute (combination vehicle)
  • Hold the pedal for one minute. Check the air gauge to see if the air pressure drops more than 3 pounds in one minute (single vehicle) or 4 pounds in one minute (combination vehicle)
System Leak Check. With the air pressure built up to the governor cut-off (120-140 psi), shut off the engine, chock your wheels, (if necessary), release the tractor parking valve and trailer parking valve (combination vehicles), 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 one minute (single vehicle) or 4 pounds in one minute (combination vehicle).
Previous Next
Question #508 (8 of 9)

Give a brief explanation of the problem:

Optional: Leave your email address if you would like a reply:

Report Cancel

Which is the proper procedure for checking the trailer parking brakes?

  • Check the angle of the S-cam coming out of the brake chamber
  • All these are correct
  • Measure the distance between the parking brake shoe and the drum. Make sure it is less than 1 inch
  • Gently trying to pull forward with the trailer parking brake on
Trailer (if applicable): With the tractor parking brake released and the trailer parking brake engaged (combination vehicles only), check that the trailer parking brake will hold the vehicle by gently trying to pull forward with the trailer parking brake on.
Previous Next
Question #510 (9 of 9)

Give a brief explanation of the problem:

Optional: Leave your email address if you would like a reply:

Report Cancel

When doing an air brake system leak check, which of the following is the correct setup for the test?

  • With the air pressure built up to the governor cut-off (120-140 psi), shut off the engine, chock your wheels, (if necessary), release the tractor parking valve and trailer parking valve
  • With the air pressure built up to the governor cut-off (120-140 psi), shut off the engine running, chock your wheels, (if necessary), and engage the tractor parking valve and trailer parking valve
  • Build the air pressure until it is between 50 - 60 pounds, keep the engine running, chock your wheels, (if necessary), release the tractor parking valve and trailer parking valve
  • None of these are correct
System Leak Check. With the air pressure built up to the governor cut-off (120-140 psi), shut off the engine, chock your wheels, (if necessary), release the tractor parking valve and trailer parking valve (combination vehicles), 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 one minute (single vehicle) or 4 pounds in one minute (combination vehicle).
Previous Next

Why Join Trucking Truth?

We have an awesome set of tools that will help you understand the trucking industry and prepare for a great start to your trucking career. Not only that, but everything we offer here at TruckingTruth is 100% free - no strings attached! Sign up now and get instant access to our member's section:
High Road Training Program Logo
  • The High Road Training Program
  • The High Road Article Series
  • The Friendliest Trucker's Forum Ever!
  • Email Updates When New Articles Are Posted

Apply For Paid CDL Training Through TruckingTruth

Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? Seriously! The application only takes one minute. You will speak with recruiters today. There is no obligation whatsoever. Learn more and apply here:

Apply For Paid CDL Training