20 Tests

Air Brakes Endorsement Test Online | Delaware 2021

Train for FREE online with our Delaware CDL air brake test. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a DE Class A/Class B driver license in 2021, practice as much as.. Read More

Train for FREE online with our Delaware CDL air brake test. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a DE Class A/Class B driver license in 2021, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that the requirements for CDL may vary from state to state.

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

When performing a static leakage test on a double combination vehicle with air brakes, the leakage rate should be no more than 3 psi in one minute. If the air leaks from the air brake system at a quicker rate, the vehicle should not be driven because something likely needs to be repaired.

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

The number varies. Air storage tanks are used to hold compressed air. The number and size of air tanks in an air brake system varies among vehicles.

3 . A modulating control valve can control the:

Anti-lock braking system (ABS). A modulating control valve allows a driver to gradually apply spring brakes. In equipped vehicles, the valve is controlled by a lever located on the dashboard.

4 . Air tank drains:

Must remain open while driving. In an air brake system, the air storage tanks are equipped with drains to allow water and compressor oil to be removed. The water and oil can damage the brakes if left to accumulate in the system.

5 . What tells you how much pressure is in your vehicle's air tanks?

A vehicle that is equipped with air brakes must also be equipped with a supply pressure gauge. This gauge tells the driver how much air pressure is in each of the vehicle's air tanks.

6 . Before a vehicle with dual air brakes is driven, pressure of at least ____ should be built up in both braking systems.

100 psi Before driving a vehicle with a dual air brake system, allow time for the air compressor to build up pressure of at least 100 psi in both the primary and secondary systems.

Wait, before you go

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