- Study guides, Class notes & Summaries

To test air service brakes you should: - Answer- Brake firmly while slowly moving forward The driver must be able to see a low air pressure warning which comes on before pressure in the service air tanks falls below ____ psi - Answer- 60 If your vehicle has an alcohol evaporator, every day during cold weather you should: - Answer- Check and fill the alcohol level All air brakes equipped vehicles have: - Answer- A supply pressure gauge The most common type of foundation brake found on...

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101 pages

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Oil and water usually collect in compressed air tanks. If you do not have an automatic tank drain, when should you drain the air tanks? - ANSWERAfter every working day EXPLANATION: If your vehicle does not have automatic air tank drains, drain your air tanks at the end of each working day to remove moisture and oil. Otherwise, the brakes could fail. What is the S-cam used for? - ANSWERTo apply the brakes. Explanation: When you push the brake pedal, air is let into each brake chamber. Air ...

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15 pages

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To check the slack adjusters on S cam brakes, you should: - ANSWER Wear gloves and pull hard on each slack adjuster. To test the low pressure warning signal, you should (3): - ANSWER * Shut the engine off * Turn the electrical power on * Step on and off the brake pedal to reduce air pressure.

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3 pages

Written in 2025/2026

Grade A+

shantelleG

Air tanks must be drained - ANSWER to drain moisture and oil out of the tanks Air braking takes more time than hydraulic braking because air - ANSWER Takes more time to flow through the lines than hydraulic fluid. What is the best way to test your vehicle's low air pressure warning signal? - ANSWER With the engine off, step on and off the brake pedal to lower the air pressure below 60 psi.

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5 pages

Written in 2025/2026

Grade A+

shantelleG

An anti-lock braking system (ABS) A - increases your normal braking capability B - decreases your normal braking capability C - activates when your wheels are about to lock up D - shortens your stopping distance - ANSWER C - activates when your wheels are about to lock up Which of the following are true about a dual air brake system? A - usually, one system operates the front axle and the other one operates the rear axle B - one system is called the "primary" system and the o...

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5 pages

Written in 2025/2026

Grade A+

shantelleG