CDL · Air brakes
During the final check of an air brake system, which of the following should you do?
Correct answer: All of these are correct.
Answer options
- ATest how quickly the system loses air
- BCheck the pressures at which the governor cuts the compressor in and out
- CAll of these are correct Correct
Why
The final air brake check is a series of tests, including the governor's cut-in and cut-out pressures, the air leakage rate, the low-pressure warning, automatic spring brake application, and the parking and service brakes. A vehicle that fails any of them should not be driven until it is repaired.
About this question
Topic: Air brakes License: CDL
Part of these practice sets:
Where it applies: Asked in every state.
Practice the whole set
This question is part of Checking and Using Air Brakes (15 questions). Take the full set and check your score.
Practice Checking and Using Air BrakesMore questions from Checking and Using Air Brakes
- While you are driving, the warning light and buzzer for low air pressure suddenly come on. What should you do?
- You test a combination vehicle's air system with the engine off and the brakes applied. The pressure loss should be less than:
- On a vehicle with air brakes, a visible low-pressure warning for the driver must activate before the pressure in the service tanks falls under a given value. What is that value, in psi?
- A dual air brake system has a primary and a secondary system. Before you drive, what is the least pressure, in psi, that each of them must reach?
- Some trucks have dual parking control valves that can use air stored in a separate tank. What is that stored air used for?
- Your truck's air tanks do not drain automatically. How often should you drain them yourself?
- A combination vehicle's air system has been built up to governor cut-out. With the engine shut off and the brake pedal fully applied, the air pressure should drop by less than:
- In a vehicle equipped with air brakes, how do you make a normal stop?
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