Air Brakes #2 - Florida Cdl

1 . Some air brake systems use alcohol:

To reduce the risk of ice forming in air brake valves. To make the compressor run more efficiently. To lubricate parts of the braking system. To reduce the risk of rust forming on air brake valves. Click Here Full Cheat Sheet

2 . An air compressor governor will stop the compressor from pumping air once the air tanks have an air pressure level of:

125 psi. 100 psi. 150 psi. 80 psi. Take a FREE Practice Test Now

3 . When using the controlled braking method in an emergency situation, you should:

Apply the brakes as hard as possible without locking the wheels. Apply the brakes with about half of your usual force. Apply the brakes so the wheels lock. Apply the brakes with minimal pressure. Take a FREE Practice Test Now

4 . 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

5 . What can happen if a parking brake is used in very wet weather when temperatures are 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 explode. Click Here Full Cheat Sheet

6 . What is removed when an air tank is drained?

Water and oil Ammonia Wood Chlorine Take a FREE Practice Test Now

7 . Foundation brakes are used:

Only at the front wheels. Only at the rear wheels. Only at the driver’s side wheels. At each wheel. Take a FREE Practice Test Now

8 . If using air tanks with manually operated drains, how often should you drain the tanks?

Every day Once a week Once a month Once every 3,000 miles Take a FREE Practice Test Now

9 . What color light indicates a vehicle's ABS is not working?

Green Blue Yellow Click Here Full Cheat Sheet

10 . What do anti-lock brakes do?

Help a driver avoid wheel lockup Lock up the front wheels Prevent a vehicle from accelerating while traveling uphill Prevent a vehicle from accelerating while traveling downhill Take a FREE Practice Test Now

11 . 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

12 . Before driving a vehicle with air brakes, you should ensure that the spring brakes come on automatically when:

Air pressure falls below 45 psi. Air pressure falls below 20 psi. Driving downhill. Driving uphill. Take a FREE Practice Test Now

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

Air tanks. Hoses. Air lines. An air compressor. 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 . What does ABS do?

Prevent wheel lockup Prevent the air compressor from overheating Prevent the front brakes from being used on ice Prevent the brakes from being used if downshifting would be more effective Take a FREE Practice Test Now

15 . Front brake limiting valves were intended to:

Prevent the front tires from skidding. Prevent the front tires from overheating. Create equal brake usage. Remove uncertainty when applying the brakes. Take a FREE Practice Test Now

16 . Friction inside a brake drum is caused when the brake shoes and linings:

Push against each other. Separate from the axle. Push against the inside of the drum. Create excess heat. Take a FREE Practice Test Now

17 . An alcohol evaporator in an air brake system:

Makes the brakes work without squeaking. Prevents ice from forming in the braking system. Lubricates parts of the braking system. Click Here Full Cheat Sheet

18 . All air tanks must include:

A drain valve. A lock. A trap door. A warning sticker. Take a FREE Practice Test Now

19 . A modulating control valve can control the:

Spring brakes. Landing gear. Air brakes. Anti-lock braking system (ABS). Take a FREE Practice Test Now

20 . Before starting down a hill, be sure to:

Accelerate. Switch into a high gear. Sound your horn. Switch into a low gear. Take a FREE Practice Test Now

21 . 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. Click Here Full Cheat Sheet

22 . If the safety relief valve in an air brake system is releasing air:

You should not be concerned as this is a normal process. There is something wrong with the brakes. The valve is operational. Take a FREE Practice Test Now

23 . A dual air brake system:

Has a single air brake system, but uses two sets of controls. Has one air brake system for each side of the truck. Has two brakes for each wheel. Has two separate air brake systems, but uses a single set of controls. Take a FREE Practice Test Now

24 . Why do you need to drain air tanks regularly?

Because the air gets old and needs to be replaced Because compressed air contains some water which must be drained from the tanks To allow for a change in air pressure To remove bad air from the tanks Take a FREE Practice Test Now

25 . How many air storage tanks are used in an air brake system?

Two tanks Four tanks Six tanks The number varies. Click Here Full Cheat Sheet