Texas CDL Air Brakes, TX CDL #3- Air Brakes- Section 5, CDL Air Brakes 2
Study online at https://quizlet.com/_53nx61
1. Air brake systems combine what Service brakes, parking brakes and emergency
three different systems? brakes.
2. When should you drain the air After every working day.
tanks?
3. Why drain water from the com- Water can freeze in cold weather and cause brake
pressed air tanks? failure.
4. Air brake equipped vehicles must A supply pressure gauge and warning signal when
have: psi drops below 60.
5. What can legally hold a parking or Spring pressure.
emergency brake in position for a
truck, truck tractor or bus?
6. What makes the total stopping dis- Brake lag distance.
tance for air brakes longer than that
for hydraulic brakes?
7. The first thing you should do when Stop and safely park ASAP.
the low air pressure warning comes
on?
8. The braking power of the spring Depends on the adjustment of the service brakes.
brakes:
9. The air compressor governor con- When air is pumped into the air tanks.
trols what?
10. The application pressure gauge Is being applied to the brakes.
shows the driver how much pres-
sure:
, Texas CDL Air Brakes, TX CDL #3- Air Brakes- Section 5, CDL Air Brakes 2
Study online at https://quizlet.com/_53nx61
11. When you apply pressure to the Pushing against a spring and against air pressure to
brake pedal, you are... the brakes.
12. The air compressor is connected to Gears or a V-belt
the engine through...
13. Which type of brake is the most com- S-cam brake
mon in commercial vehicles?
14. An application pressure gauge... Shows how much air pressure you are applying to the
brakes.
15. All vehicles with air brakes are re- A red light, wig wag mechanical arm or a buzzer.
quired to have a low pressure warn-
ing signal. This could be...
16. To test service brakes you should... Release the parking brake, move forward slowly and
depress brakes.
17. Stab braking occurs when you... 1. Press on a brake pedal as hard as you can. 2.
Release the brakes when the wheels lock up. 3. Apply
the brakes when the wheels start rolling.
18. Air brakes take longer to stop than It takes longer for the air to flow through the lines.
hydraulic brakes because...
19. The proper way to go down long Apply brakes just hard enough to reduce speed to 5
grades is to... mph below safe speed then release until back to safe
speed and repeat process.
20. When should you avoid using the When the brakes are hot.
parking brake?
21. Check and fill the alcohol level.
, Texas CDL Air Brakes, TX CDL #3- Air Brakes- Section 5, CDL Air Brakes 2
Study online at https://quizlet.com/_53nx61
If your vehicle has an alcohol evapo-
rator, everyday during cold weather
you should:
22. During normal driving, spring Air pressure
brakes are usually he'd back by
what?
23. In air brake vehicles, the parking Whenever the vehicle is parked.
brakes should be used when?
24. The brake pedal in an air brake sys- Controls the air pressure applied to put on the
tem does what? brakes.
25. If your bus has dual parking con- Release the spring brakes to move a short distance.
trol valves it means that you can use
pressure from a separate tank to:
26. A straight truck or bus air brake sys- 2
tem should not leak at a rate of more
than ____ PSI per minute with the
engine off and the brakes released.
27. An alcohol evaporator does what? Reduces the risk of ice in the air brake valves in cold
weather.
28. If you must make an emergency Stay in a straight line and can steer.
stop, you should brake so that you:
29. Air loss should not be more than ___ 2 psi per minute
with the engine off and brakes re-
leased.
30. Stab braking
Study online at https://quizlet.com/_53nx61
1. Air brake systems combine what Service brakes, parking brakes and emergency
three different systems? brakes.
2. When should you drain the air After every working day.
tanks?
3. Why drain water from the com- Water can freeze in cold weather and cause brake
pressed air tanks? failure.
4. Air brake equipped vehicles must A supply pressure gauge and warning signal when
have: psi drops below 60.
5. What can legally hold a parking or Spring pressure.
emergency brake in position for a
truck, truck tractor or bus?
6. What makes the total stopping dis- Brake lag distance.
tance for air brakes longer than that
for hydraulic brakes?
7. The first thing you should do when Stop and safely park ASAP.
the low air pressure warning comes
on?
8. The braking power of the spring Depends on the adjustment of the service brakes.
brakes:
9. The air compressor governor con- When air is pumped into the air tanks.
trols what?
10. The application pressure gauge Is being applied to the brakes.
shows the driver how much pres-
sure:
, Texas CDL Air Brakes, TX CDL #3- Air Brakes- Section 5, CDL Air Brakes 2
Study online at https://quizlet.com/_53nx61
11. When you apply pressure to the Pushing against a spring and against air pressure to
brake pedal, you are... the brakes.
12. The air compressor is connected to Gears or a V-belt
the engine through...
13. Which type of brake is the most com- S-cam brake
mon in commercial vehicles?
14. An application pressure gauge... Shows how much air pressure you are applying to the
brakes.
15. All vehicles with air brakes are re- A red light, wig wag mechanical arm or a buzzer.
quired to have a low pressure warn-
ing signal. This could be...
16. To test service brakes you should... Release the parking brake, move forward slowly and
depress brakes.
17. Stab braking occurs when you... 1. Press on a brake pedal as hard as you can. 2.
Release the brakes when the wheels lock up. 3. Apply
the brakes when the wheels start rolling.
18. Air brakes take longer to stop than It takes longer for the air to flow through the lines.
hydraulic brakes because...
19. The proper way to go down long Apply brakes just hard enough to reduce speed to 5
grades is to... mph below safe speed then release until back to safe
speed and repeat process.
20. When should you avoid using the When the brakes are hot.
parking brake?
21. Check and fill the alcohol level.
, Texas CDL Air Brakes, TX CDL #3- Air Brakes- Section 5, CDL Air Brakes 2
Study online at https://quizlet.com/_53nx61
If your vehicle has an alcohol evapo-
rator, everyday during cold weather
you should:
22. During normal driving, spring Air pressure
brakes are usually he'd back by
what?
23. In air brake vehicles, the parking Whenever the vehicle is parked.
brakes should be used when?
24. The brake pedal in an air brake sys- Controls the air pressure applied to put on the
tem does what? brakes.
25. If your bus has dual parking con- Release the spring brakes to move a short distance.
trol valves it means that you can use
pressure from a separate tank to:
26. A straight truck or bus air brake sys- 2
tem should not leak at a rate of more
than ____ PSI per minute with the
engine off and the brakes released.
27. An alcohol evaporator does what? Reduces the risk of ice in the air brake valves in cold
weather.
28. If you must make an emergency Stay in a straight line and can steer.
stop, you should brake so that you:
29. Air loss should not be more than ___ 2 psi per minute
with the engine off and brakes re-
leased.
30. Stab braking
