Which device allows you to remove oil and water from the air brake systems?
Correct answer(s):
- Air tank drain
Topic
Air Brakes Test
If you plan on driving any CMV equipped with air brakes, you must take and pass the air brakes test to remove the air brakes restriction from your CDL. The air brakes test is different than the endorsement tests because the air brakes test works as a restriction instead of an endorsement. If you do not pass the air brakes test, your CDL will bear a mark of restriction which means that you are not authorized to drive a CMV with air brakes.
Quizzes in Air Brakes Test
What does it mean when the safety valve opens and releases air?
Correct answer(s):
- The pressure has exceeded 150 psi
- Something is wrong, and a mechanic needs to check it
What should the air pressure loss be in a single vehicle with a fully charged air system?
Correct answer(s):
- Less than 2 psi per minute
In a combination vehicle, what should the air pressure loss be with a fully charged air system?
Correct answer(s):
- Less than 3 psi per minute
Where is compressed air stored?
Correct answer(s):
- Main reservoirs
Which of the following devices indicates how much air pressure you are applying to your brakes?
Correct answer(s):
- Application pressure gauge
Which of the following devices can be used as the low air pressure warning signal?
Correct answer(s):
- Any of a buzzer, red warning light, or a mechanical arm (wig wag)
What is a wig-wag?
Correct answer(s):
- A mechanical arm that comes into view when the air pressure falls below 60 psi
What is a modulating control valve?
Correct answer(s):
- A lever used to apply the spring brakes gradually
What does the Air Compressor Governor control?
Correct answer(s):
- When the air compressor pumps air into the storage tanks