Air Brakes - Nebraska Cdl

1 . In a dual air brake system:

Air tanks are shared between both systems. Each system has its own air tanks. You must designate which system you are using. Click Here Full Cheat Sheet

2 . During a static leakage test, the maximum leakage rate for a double combination vehicle is:

3 psi in one minute. 6 psi in one minute. 8 psi in one minute. 4 psi in one minute. Take a FREE Practice Test Now

3 . To stop in a vehicle that uses air brakes, the driver should:

Pull the air brake lever. Engage the brake lever. Push the brake pedal down. Pull the brake pedal up. Take a FREE Practice Test Now

4 . What tells you how much pressure is in your vehicle's air tanks?

The supply pressure gauge The ABS malfunction lamp The tractor protection valve Take a FREE Practice Test Now

5 . Both systems in a dual air brake systems share:

Air tanks. Hoses. Air lines. An air compressor. Click Here Full Cheat Sheet

6 . A tank endorsement is:

Only required when transporting gases. Only required when transporting liquids. Required when transporting both liquids and gases. Optional when transporting hazardous materials. Take a FREE Practice Test Now

7 . To inspect slack adjusters on S-cam brakes, you need to:

Park on a hill and test the brakes. Put on gloves and push in the slack adjusters. Remove the drum and look inside. Chock the wheels and disengage the parking brake. Take a FREE Practice Test Now

8 . What color is the low air pressure warning light?

Green Orange Red Purple Take a FREE Practice Test Now

9 . In a dual air brake system, if one air system is very low on pressure:

None of the brakes will work at all. Either the front or rear brakes will not be fully operable. There is usually no noticeable effect. Click Here Full Cheat Sheet

10 . While driving, spring brakes are generally held in place by:

Air pressure. Chocks. Foundation brakes. Sturdy ties. Take a FREE Practice Test Now

11 . A low air pressure warning signal should activate:

When tank pressure falls below 120 psi. When tank pressure falls below 55 psi. When tank pressure falls below 10 psi. Take a FREE Practice Test Now

12 . On newer vehicles, how do you put on the parking brake?

Move a lever to the right. Push in the yellow, diamond-shaped knob. Pull out the yellow, diamond-shaped knob. Pull up on the steering column. Take a FREE Practice Test Now

13 . Most heavy-duty vehicles use ____ air brake systems.

Single Dual Triple Quad Click Here Full Cheat Sheet

Study tip: Reduce your study time from hours to minutes with a DMV exam “Cheat Sheet” 99.2% of people who use the cheat sheet pass the FIRST TIME Click Here Full Cheat Sheet

14 . Using an Anti-Lock Braking System (ABS):

Shortens stopping distance. Shortens brake response time. Provides less control. Provides more control. Take a FREE Practice Test Now

15 . Emergency brakes:

Are not required on vehicles with air brakes. Are required only on buses. Are required on all vehicles. Take a FREE Practice Test Now

16 . The ____ between an air compressor and reservoir tank prevents air from escaping if the air compressor has a leak.

Slack adjuster One-way check valve Tractor protection valve Take a FREE Practice Test Now

17 . What must be on an air tank in an air-braked vehicle?

A check valve A lock A trap door An oxidizer Click Here Full Cheat Sheet

18 . Using the brakes creates heat. If too much heat is produced:

The brakes may not work. The brakes may squeak more than usual. The brakes will brake unevenly. Take a FREE Practice Test Now

19 . Anti-Lock Braking Systems (ABS):

Reduce normal braking capacity. Are equipped in addition to other braking systems and do not reduce normal braking power. Are not effective on larger vehicles. Are illegal in some states. Take a FREE Practice Test Now

20 . When traveling down a steep downgrade, the best way to use your brakes is to:

Ride the brakes all the way down the hill. Apply the brakes for a few seconds, then release the brakes for a few seconds. Continue to repeat these steps as you travel down the hill. Apply the brakes only near the bottom of the downgrade. Apply consistent pressure to the brake pedal all the way down the hill. Take a FREE Practice Test Now

21 . What color are ABS malfunction lamps?

Orange Yellow Green Blue Click Here Full Cheat Sheet

22 . What is brake lag?

The time required for the brakes to work after the brake pedal is pressed The distance between the brake pedal and the floor The amount of air pressure used to stop the vehicle Take a FREE Practice Test Now

23 . If your tractor is equipped with ABS but your trailer is not, the ABS:

Will not be effective. Will still improve your steering control. Will make jackknifing easier. Will allow others to see when you brake. Take a FREE Practice Test Now

24 . To ensure normal stopping power, drivers of vehicles equipped with a front brake limiting valve should:

Set the control to normal. Set the control to the off position. Set the control to neutral. Keep the control at the halfway mark. Take a FREE Practice Test Now

25 . An emergency brake must be controlled by:

Mechanical force. Air pressure. Gravity. Click Here Full Cheat Sheet