Air Brakes #2

FREE Air Brakes Endorsement Test Online | Massachusetts 2024

Train for FREE online with our Massachusetts 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 MA Class A/Class B driver license in 2021, practice as much as..

Train for FREE online with our Massachusetts 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 MA 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 . A tank endorsement is:

Optional when transporting hazardous materials. In general, a tank endorsement is required to a drive tank vehicle used to transport liquids or gases. This applies to both hazardous and non-hazardous materials.

2 . What does the air compressor governor do?

Controls the temperature of the air leaving the air storage tanks. In an air brake system, the air compressor governor controls when the air compressor pumps air into the air storage tanks.

3 . Braking mechanisms are located ____ a brake drum.

On top of Drum brakes are attached to the wheels and located on the axles of a vehicle. The braking mechanisms that cause the vehicle to stop can be found inside of a drum brake.

4 . During a static leakage test, the maximum leakage rate for a single vehicle with air brakes is ____ in one minute.

4 psi When performing a static leakage test on a single vehicle with air brakes, the leakage rate should be no more than 2 psi in a minute. If air leaks from the air brake system at a quicker rate, the vehicle should not be driven because something likely needs to be repaired.

5 . A low air pressure warning signal should activate:

When tank pressure falls below 5 psi. In an air brake system, a low air pressure warning signal must come on if air pressure in the tanks falls below 60 psi. This warning signal may come in the form of a light, a buzzer, or a wig wag.

6 . The air pressure in a dual air brake system should build from 85 to 100 psi within:

45 seconds. When inspecting a vehicle with a dual air brake system, you should wait for air pressure to build from 85 to 100 psi in both the primary and secondary systems. This should take about 45 seconds.

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