Air Brakes
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| Which of the following is okay to find in the air brake system? | show 🗑
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| show | 3 psi in one minute
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| show | 60 psi
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| show | The one-way check valve
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| Which brake system applies and releases the brakes when the driver uses the brake pedal? | show 🗑
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| show | Spring pressure
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| The air loss rate for a straight truck or bus with the engine off and the brakes applied should not be more than: | show 🗑
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| show | An air pressure gauge, to show the pressure available for braking
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| show | The heavier a vehicle or the faster it is moving, the more heat the brakes have to absorb to stop it
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| show | Emergency brakes
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| The purpose of engine retarders is to: | show 🗑
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| To use the stab braking technique during emergency braking, you: | show 🗑
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| If your vehicle has an alcohol evaporator, it's there to: | show 🗑
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| If your vehicle is equipped with an alcohol evaporator, every day during the winter you should: | show 🗑
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| The air supply pressure gauge shows the driver how much pressure: | show 🗑
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| The most common type of foundation brake found on heavy commercial motor vehicles is: | show 🗑
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| A straight truck or bus air brake system cannot leak more than how many psi per minute with the engine off and the brakes released? | show 🗑
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| How do you check the free-play in manual slack adjusters? | show 🗑
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| show | Use the braking effects of the engine, and when the vehicle speed reaches the "safe" speed, apply brakes firmly until vehicle speed is reduced to approximately 5 mph below "safe" speed
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| When a failure occurs in the service brake system, the system you need to use to stop the vehicle is the: | show 🗑
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| show | Release the emergency brakes to move a short distance
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| The air compressor governor controls: | show 🗑
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| When you have to make a quick emergency stop, you should brake in a way that allows you to: | show 🗑
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| show | Air pressure
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| In air brake equipped vehicles, you use the parking brakes when? | show 🗑
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| show | The adjustment of the service brakes
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| show | 3 psi
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| show | Controls the air pressure applied to operate the brakes
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| show | Air pressure
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| Why should you not fan the brakes on and off during long downgrades? | show 🗑
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| Modern air brake systems combine three different systems. The systems are the service, parking and ________ brake systems. | show 🗑
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| show | 60.
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| The brake pedal in an air brake system: | show 🗑
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| show | Takes more time to flow through the lines than hydraulic fluid.
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| If your vehicle has an alcohol evaporator, it is there to: | show 🗑
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| show | Release the spring emergency parking brakes to move a short distance.
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| To check the free play of manual slack adjusters on S-cam brakes you should park on: | show 🗑
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| show | Stop and safely park as soon as possible.
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| The air compressor governor controls: | show 🗑
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| show | Depends on whether the service brakes are in adjustment.
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| show | A supply pressure gauge.
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| If you must make an emergency stop, brake so you: | show 🗑
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| If you do not have automatic tank drains, how often should you drain the oil and water from the bottom compressed air storage tanks? | show 🗑
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| The application pressure gauge shows how much air pressure you: | show 🗑
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| Your brakes are fading when: | show 🗑
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| show | Check the alcohol level and fill the evaporator if needed
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| show | Water can freeze in cold weather and cause brake failure.
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| show | Bring the vehicle to a safe stop and continue only when the system is repaired.
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| During normal driving, spring brakes are usually held back by: | show 🗑
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| show | Anytime the vehicle is parked.
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| Emergency stab braking is when you: | show 🗑
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| show | 2.
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| The air loss rate for a straight truck with the engine off and the brakes on should not be more than: | show 🗑
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| show | Is in the air tanks.
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| show | Service.
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| Total stopping distance for air brakes is longer than that for hydraulic brakes due to distance. | show 🗑
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| show | S-cam drum brake.
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| show | The one-way check valve.
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| Air brakes take-more time to-activate than hydraulic-brakes because: | show 🗑
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| show | Brake lag distance.
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| What affects the power of spring brakes? | show 🗑
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| show | Service.
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| show | Emergency.
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| What does the air compressor governor control? | show 🗑
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| show | Water can freeze and cause brake failure.
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| In cold weather, what should you do to an alcohol evaporator? | show 🗑
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| In an air brake system, a brake pedal: | show 🗑
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| What do all air brake-equipped vehicles have? | show 🗑
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| The air supply pressure gauge indicates: | show 🗑
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| show | To release the spring brake in an emergency.
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| show | You have to push harder to control your speed.
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| show | Park on level ground, chock the wheels, turn off the parking brakes.
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| What does the application pressure gauge show? | show 🗑
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| The air pressure warning light should come on before the pressure gets below: | show 🗑
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| show | Air pressure.
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| show | Spring pressure.
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| With the engine off and the service brake released, a straight truck air brake system should not leak at a rate greater than: | show 🗑
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| You have a problem if you are testing the service brakes and notice that: | show 🗑
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| show | Stopping action is delayed.
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| show | D.All of the above.
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| show | All axles.
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| show | Bring the vehicle to a safe stop and get the system fixed.
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| show | The air pressure falls to between 20 and 40 psi.
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| During an emergency stop, how should you brake? | show 🗑
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| Emergency stab braking is: | show 🗑
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| Why is controlled or stab braking better than short, light brake pedal pressure on long downhill grades? | show 🗑
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| show | Stop and park as soon as possible.
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| show | Any time you park.
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| If it is not done automatically in your vehicle, how often should you drain your air tanks? | show 🗑
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| show | The service brake and parking brake and emergency system.
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| What is used to make the brakes work? | show 🗑
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| What does the air compressor do? | show 🗑
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| show | It controls when the compressor will pump air into the air storage tanks.
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| How much compressed air must the storage tanks hold? | show 🗑
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| If oil and water collect in the air tanks what can happen to the brakes? | show 🗑
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| show | Every day.
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| Where will you find the drain valve for each air tank? | show 🗑
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| show | Manually operated. . .Automatic.
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| What is a purpose of an alcohol evaporator? | show 🗑
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| show | Check the alcohol container and fill up as necessary every day.
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| What is a purpose of the safety release valve in the first tank? | show 🗑
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| What are two other names for the brake pedal? | show 🗑
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| show | Air can be let out of the system faster than the compressor can replace.
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| Where are foundation brakes found? | show 🗑
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| Where are brake shoes and linings located? | show 🗑
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| show | This causes friction which slows the vehicle and creates heat.
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| show | Air pressure forces out the push rod and moves the slack adjuster.
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| show | It presses them against the inside of the brake drum.
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| show | The one-way check valve.
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| What is one kind of gauge that is required for vehicles with air brakes? | show 🗑
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| show | A low air pressure warning signal.
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| show | A red light ...or a buzzer ...or a wigwag
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| show | An electric switch that works by air pressure.
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| In normal driving parking and emergency brakes are usually held back by? | show 🗑
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| The effectiveness of the spring brakes are usually held back by? | show 🗑
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| Why do some buses have a separate air tank to release spring brakes? | show 🗑
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| show | Two separate air brake systems with a single set of brake controls.
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| What should you look for in checking an air compressor belt? | show 🗑
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| show | Park on level ground and chock the wheels and release parking brakes.
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| show | Less than three pounds per square inch.
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| Single vehicle: brakes released. Maximum air leakage in one minute? | show 🗑
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| After applying brakes fully, maximum air loss in one minute – single vehicles? | show 🗑
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| show | Four pounds per square inch
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| When should the air governor cut out the air compressor? | show 🗑
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| show | Do not push the clutch in until the engine R.P.M.'s are down close to idle.
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| show | Stay in a straight line and can steer.
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| show | Squeeze braking.
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| show | Pressing the brake pedal and releasing brakes when wheels lock up.
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| Why does air braking take more time than hydraulic braking? | show 🗑
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Created by:
kevin18st