Air Brakes - Oregon Cdl

1 . The application pressure gauge:

Shows how much air pressure is being applied to the brakes. Shows the temperature of air being used in the braking system. Shows the pressure of the air coming from the compressor. Shows the number of times the brakes have been used. Click Here Full Cheat Sheet

2 . What happens if the air pressure in a system's air tanks falls below 60 psi?

A warning light will come on. The vehicle will not shift out of gear. The front lights will flash. The vehicle should stop. Take a FREE Practice Test Now

3 . Once the air tanks are at an air pressure level of 125 psi, the air compressor governor will:

Stop the compressor from pumping air. Release air from the tanks. Begin pumping air into the tanks. Take a FREE Practice Test Now

4 . Brake fading is caused when:

Brakes are not used often enough. Brakes overheat. Brakes are too cold. Brakes are wet. Take a FREE Practice Test Now

5 . An Anti-Lock Braking System (ABS):

Cannot be used with air brakes. Should be used on dry pavement. Can assist in maintaining control when braking. Should only be used if all axles have ABS. Click Here Full Cheat Sheet

6 . If one air system in a dual air brake system is very low on pressure:

None of the brakes will work at all. Either the front or rear brakes will not be operating fully. There will be no noticeable affect. Lights on the outside of the tractor will flash. Take a FREE Practice Test Now

7 . ABS brakes:

Help you avoid wheel lockup. Lock up your vehicle's wheels. Prevent your vehicle from accelerating when going uphill. Take a FREE Practice Test Now

8 . What color malfunction lamps do vehicles equipped with ABS have?

Green Yellow Blue Take a FREE Practice Test Now

9 . To confirm that a trailer has ABS, you can:

Look under the trailer for wheel speed sensors coming from the back of the brakes. Look under the hood for the ABS sticker. Look at the tires. Remove a tire and look for the ABS sensor on the axle. Click Here Full Cheat Sheet

10 . What can happen if the air pressure gets too low in an air brake system?

The brakes may squeak. The brakes may not work. The brakes may be sluggish. The brakes will be very sensitive. Take a FREE Practice Test Now

11 . During an inspection, slack adjusters on S-cam brakes should not move more than:

One foot. One centimeter. One inch. Take a FREE Practice Test Now

12 . The emergency brake system uses:

Only parts of the parking brake system. Only parts of the service brake system. Parts of both the parking and service brake systems. Only parts unique to the emergency brake system. Take a FREE Practice Test Now

13 . You should not use the parking brake:

If your vehicle is stopped on a level surface. If your vehicle is stopped on a slight incline. If your vehicle's brakes are very hot. If your vehicle's other braking systems seem to be working adequately. Click Here Full Cheat Sheet

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14 . During an applied leakage test, what is the maximum leakage rate that is safe for a single vehicle with air brakes?

10 psi in one minute 5 psi in one minute 3 psi in one minute Take a FREE Practice Test Now

15 . Foundation brakes are used:

Only on the front wheels of a vehicle. Only on the rear wheels of a vehicle. On each wheel of a vehicle. Take a FREE Practice Test Now

16 . What can happen if parking brakes are used in very wet weather with temperatures below freezing?

The brakes will squeak. The brakes may freeze so the vehicle cannot move. The brakes may suddenly release by themselves. The brakes may become too smooth to be used. Take a FREE Practice Test Now

17 . When only the tractor is equipped with an Anti-Lock Braking System (ABS):

There is a decreased risk of jackknifing. There is an increased risk of jackknifing. The brakes will not work as effectively as they would without ABS. The brakes will become more sensitive. Click Here Full Cheat Sheet

18 . 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

19 . Manual air tank drains should be:

Opened to drain the tanks after each day. Left open while driving. Sealed with glue. Take a FREE Practice Test Now

20 . Before driving a vehicle with a dual air brake system, you must wait for the air compressor to build a minimum of ____ in both the primary and secondary systems.

25 psi 50 psi 75 psi 100 psi Take a FREE Practice Test Now

21 . In cold weather, an alcohol evaporator should be checked and filled:

Once a week. Every day. Every hour. Once a month. Click Here Full Cheat Sheet

22 . When stopping in an emergency situation, you should:

Veer your trailer to the right and stop. Stop in a straight line. Veer your trailer to the left and stop. Take a FREE Practice Test Now

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

Is required in some states. Shortens brake response time. Provides additional control. Take a FREE Practice Test Now

24 . Air brakes use ____ to function.

Compressed air Liquid air Nitrogen Take a FREE Practice Test Now

25 . Truck tractors with air brakes that were built on or after March 1, 1997 are equipped with:

An extra set of brakes. Voice-activated brakes. Cruise control. Anti-Lock Braking Systems (ABS). Click Here Full Cheat Sheet