Air Brakes #2 - Oklahoma Cdl

1 . When leaving your vehicle unattended:

The parking brake should be used. The parking brake only needs to be used if the vehicle is parked on a slope. The parking brake should not be used, as it can damage the tires. Click Here Full Cheat Sheet

2 . You should test the low pressure warning signal by:

Turning on the engine and applying the trailer hand brake. Rapidly pressing and releasing the brake pedal. Removing wheel chocks and disengaging the parking brake. Take a FREE Practice Test Now

3 . Before driving a vehicle with air brakes, you should ensure that the ____ come on automatically when air pressure falls below 45 psi.

Spring brakes Parking brakes Air brakes Take a FREE Practice Test Now

4 . To make a stop in a vehicle equipped with air brakes, the driver should:

Press the brake pedal down. Lift the brake pedal up. Pull out the air brake knob. Take a FREE Practice Test Now

5 . When you are about to start down a hill, you should switch into a ____ gear.

Higher Faster Lower Click Here Full Cheat Sheet

6 . If the safety relief valve in the air brake system releases air:

The compressor needs more air. The air pressure has become too high. The brakes are fully operational. Take a FREE Practice Test Now

7 . During a static leakage test, what is the maximum leakage rate that is safe for a double combination vehicle?

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

8 . 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. Take a FREE Practice Test Now

9 . 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. Click Here Full Cheat Sheet

10 . Truck tractors with air brakes built on or after March 1, 1997 must have:

An Anti-Lock Braking System (ABS). Bluetooth. A GPS. Take a FREE Practice Test Now

11 . 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 the neutral position. Take a FREE Practice Test Now

12 . During an applied leakage test, the maximum leakage rate for a double combination vehicle is ____ in a minute.

2 psi 4 psi 6 psi Take a FREE Practice Test Now

13 . In a vehicle with dual parking control valves, a separate air tank can be used:

To make the air brakes work more effectively. To temporarily release the spring brakes. To charge the brakes on the rear trailer. 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 . In a dual air brake system, air pressure should build from 85 to 100 psi within ____ seconds.

25 10 45 Take a FREE Practice Test Now

15 . Brakes out of adjustment will:

Work properly. Cause some of the brakes to overwork and malfunction. Allow better acceleration. Take a FREE Practice Test Now

16 . What helps prevent wheel lockup when braking?

An Anti-Lock Braking System (ABS) Air brakes An alternator Take a FREE Practice Test Now

17 . Air tank drains:

Should not be used in cold weather. Are helpful to remove water and oil from the air tanks. Are used to move air to the brakes. Click Here Full Cheat Sheet

18 . Anti-Lock Braking Systems (ABS):

Reduce a vehicle's normal braking capacity. Are in addition to other braking systems and do not reduce a vehicle's braking power. Are not effective on larger vehicles. Take a FREE Practice Test Now

19 . When operating a vehicle with a dual air brake system, the driver should:

Let the vehicle warm up before driving to ensure that the fuel reaches the engine. Let the air compressor build up a minimum of 100 psi pressure in the primary and secondary systems before driving. Begin driving just after the vehicle starts. Take a FREE Practice Test Now

20 . A slack adjuster should move no more than ____ from where it is attached to the push rod.

Two inches Five inches One inch Take a FREE Practice Test Now

21 . ABS brakes:

Help you avoid wheel lockup. Lock up your vehicle's wheels. Prevent your vehicle from accelerating when going uphill. Click Here Full Cheat Sheet

22 . If the low air pressure warning signal comes on in a vehicle with air brakes, the driver should:

Test the brakes while driving, but continue driving if nothing seems wrong. Immediately stop driving. Drive with the hazard lights activated. Take a FREE Practice Test Now

23 . Some water and compressor oil is usually found in the compressed air within an air brake system. The water and compressor oil:

Are necessary for the proper function of the system. Should take up about 10 percent of the tank. Should be removed regularly. Take a FREE Practice Test Now

24 . What kind of brakes do most newer heavy-duty trucks use?

Single air brakes Dual air brakes Triple air brakes Take a FREE Practice Test Now

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

One foot. One centimeter. One inch. Click Here Full Cheat Sheet