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BRAKE PRACTICE MASTER STUDY PACK
2026 PREMIUM SOLVED COMPENDIUM
โ If oil and water collects in the air tanks what can happen to the brakes?. Answer: The brakes could fail โ What is the purpose of an alcohol evaporator?. Answer: To reduce the risk of ice in the brake valves and other parts in cold weather. โ What is another name for controlled braking?. Answer: Squeeze braking โ The brake chamber fills with air pushing the rod out which moves the ___________________ __________________________, which twists the _____________________ ___________________.. Answer: Slack adjuster and brake camshaft. โ If your vehicle has an alcohol evaporator you should check and fill the alcohol level everyday during cold weather.. Answer: True
โ To test the air service brakes you should:. Answer: Brake firmly while slowly moving forward. โ The driver must be able to see a low pressure warning which comes on before pressure in the service air tank falls below:. Answer: 60 psi โ Converter dollies built on or after March 1, 1998 are required to have anti-lock brakes. These dollies will have:. Answer: A yellow malfunction lamp on the left side of the dolly. โ Which of these is the most important thing to remember about emergency braking?. Answer: If the wheels are skidding, you cannot control the vehicle. โ Controlled braking:. Answer: Is used to keep a vehicle in a straight line when braking. โ To correct a drive-wheel braking skid, you should:. Answer: Stop braking, turn quickly, and countersteer.
Answer: Whenever you leave the vehicle unattended โ The use of air brakes on a downgrade is only a supplement to the:. Answer: Braking effect of the engine. โ Excessive heat in the brakes can cause the:. Answer: Brakes to fade or fail โ You are on a steep down grade and have reached your safe speed of 40 mph. You would apply the service brakes until your speed drops to __________________ mph.. Answer: 35 โ If your bus or truck has dual parking control valves, you can use pressure from a separate tank to:. Answer: Release the spring emergency/parking brakes to move a short distance. โ The modulating control valve allows you to control the:. Answer: Spring brakes โ Some air brake systems have an alcohol evaporator. What may happen if you don't keep the unit filled with alcohol?.
Answer: Ice may form in the air storage tanks and cause the brakes to fail. โ Before driving a truck or bus with a dual air brake system, the pressure in each air brake system should be at least _____ psi.. Answer: 100 โ How should you check that the spring brakes come on when the air pressure in the system drops below a certain level?. Answer: Park on level ground, chock the wheels, release the parking brake when you have enough air pressure, shut the engine off, and repeatedly press and release the brake pedal. โ For air brake systems in good condition, the air compressor should start pumping at about _____ psi.. Answer: 100 โ In air brake vehicles, the parking brake should be used:. Answer: Any time the vehicle is parked. โ The most important thing to do when low air pressure warning comes on is:. Answer: Stop and safely park as soon as possible.
โ All air brake equipped vehicles have. Answer: A supply pressure gauge โ When the brakes are applied the brake shoes (or linings) are pressed against the. Answer: Brake drum or disc โ How should you check that your service brakes are working properly?. Answer: Park on level ground, wait for normal air pressure, release the parking brake, move the truck forward slowly (about 5 mph) and apply the brakes firmly using the brake pedal โ To test air service brakes, you should. Answer: Brake firmly when slowly moving forwards โ The modulating control valve allows you to control the. Answer: Spring brakes โ When is it okay to leave your truck unattended without applying the parking brake or chocking the wheels?. Answer: Never
โ The driver must be able to see a warning before air pressure in the service air tanks falls below. Answer: 60 psi โ An air brake system is fully charged at. Answer: 125 psi โ If the spring brakes are on, when should. Answer: Never โ How should you check that the spring brakes come on when air pressure in the system drops below a certain level?. Answer: Park on level ground, chock the wheels, engage the park brake when you have the correct amount of air pressure to do so, and shut the engine off โ The brake pedal in an air brake system. Answer: Controls the air pressure applied to put on the brakes โ If the spring brakes are on, when should you push the brake pedal?. Answer: Never
โ The proper method of braking when going down long and/or steep grades after selecting the proper gear is to brake until your speed is about. Answer: 5 miles per hour below your "safe" speed, then release your brakes โ You should know that your brakes are fading when. Answer: You have to push down harder on the brake pedal to control your speed on a downgrade โ The braking power of the spring brakes. Answer: Depends on the service brakes being in adjustment โ The safety valve is set to automatically reduce pressure at. Answer: 150 psi โ During normal driving, spring brakes are usually held back by. Answer: Air pressure โ Why drain water from compressed air tanks?. Answer: Water can freeze in cold weather and cause brake failure
โ A slack adjuster probably needs to be adjusted if it moves than about. Answer: 1 inch when you pull hard on it โ To check the free play of manual slack adjusters on S-cam brakes, you should park on. Answer: Level ground, chock the wheels, and turn off the parking brakes โ The use of air brakes on a long and/or steep downgrade under normal conditions is only a supplement to. Answer: The braking effect of the engine โ Emergency stab braking is when you. Answer: Brake as hard as you can, release the brakes when the wheels lock, put on the brakes again when the wheels start rolling
