Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| How do brakes work on a long, steep downgrade? | show 🗑
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| show | Every time you leave your vehicle, with a few exceptions
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| The purpose of a supply pressure gauge is: | show 🗑
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| show | Safety Valve
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| Which of the following can cause brakes to fade or fail? | show 🗑
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| Which of the following are true about a dual air brake system? | show 🗑
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| show | Radio signal system
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| show | Your brakes may fail because of water freezing
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| show | Provides the air supply for the brake system, will close if you apply the parking brakes, will close automatically if the air supply drops to a certain level
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| show | All vehicles with air brakes currently in operation
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| show | Set the parking brakes, chock the wheels, remove the keys
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| An antilock braking system (ABS): | show 🗑
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| show |
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| show 🗑
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| Under which conditions are front wheel brakes good? | show 🗑
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| show | You should drive faster so that you will be able to keep the trailer and tractor in sight
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| show | With the engine off, step on and off the brake pedal to lower the air pressure below 60 psi
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| show | You will still have normal brake function and will need to get the ABS repaired soon
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| show | Use gloves and pull hard on each slack adjuster you can reach
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| show | 150 psi
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| How can you tell if your vehicle is equipped with an ABS? | show 🗑
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| show | Between the push rod and S-cam on drum brakes, part of the air brake system that is used to adjust the brakes, and between the power screw and push rod on disc brakes
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| show | All are correct
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| show | Brakes that come on automatically on a truck or tractor when the psi drops too low, not going to take full effect until your psi drops to a certain range (20-30 psi), made up of powerful springs that are held back by air pressure while you are driving
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| show | Depends on whether the service brakes are in proper adjustment
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| The driver must be able to see a low pressure warning, which comes on before pressure in the service air tank falls below: | show 🗑
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| The safety valve is set to automatically reduce pressure at: | show 🗑
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| The SERVICE brake system applies: | show 🗑
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| The application pressure gauge shows the amount of air pressure: | show 🗑
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| show | When air is pumped into the air storage tanks
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| The stop light switch: | show 🗑
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| show | Stop and park safely. Continue only after the system has been fixed.
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| show | 45
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| show | Service
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| On a long or steep downgrade, once you have reached your “safe” speed, brake until you are traveling: | show 🗑
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| show | 3 psi in one minute
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| show | Spring pressure
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| In a vehicle equipped with air brakes, the brake pedal: | show 🗑
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| show | S-cam drum brake
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| In the event of a brake system failure, the emergency brake system uses _____ to stop the vehicle. | show 🗑
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| The S-cam: | show 🗑
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| At 55 mph on dry pavement, the air brake lag distance is about: | show 🗑
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| What is the supply pressure gauge used for? | show 🗑
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| The parking brake control: | show 🗑
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| show | Slack adjusters, brake camshaft
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| show | Spring brakes
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| show | Release the spring emergency/parking brakes
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| To make an emergency stop with the “stab braking” method, you should: | show 🗑
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| If the air compressor should develop a leak, what will keep air in the tanks? | show 🗑
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| Excessive use of the service brakes may result in overheating, which can lead to : | show 🗑
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| show | 55 psi
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| show | 1 inch
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| show | Let the air out of the brake chambers
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| show | 125
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| show | Release the spring brakes
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| Your vehicle has a dual air brake system. One of the systems loses air pressure. What will happen? | show 🗑
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| show | Never.
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| Tractor and straight truck spring brakes will come fully on when the air pressure drops to a range of: | show 🗑
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| A typical air brake system is fully charged at: | show 🗑
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| show | Air pressure
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| show | It may lead to sudden emergency braking in a single-circuit air system
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| show | If the brakes are very hot.
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| show | Brake drum
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| show | Compressed air enters the brake chambers
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| Under ideal conditions, the average driver of a truck or bus equipped with air brakes and traveling at 55 mph would require what stopping distance? | show 🗑
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| If you need to stop quickly and your vehicle lacks antilock brakes, you can use: | show 🗑
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| Which of the following is the most important thing about hard braking? | show 🗑
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| A converter dolly with ABS is required to have: | show 🗑
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| During your final air brake check, if the air pressure does not build up fast enough: | show 🗑
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| show | Stop braking, turn quickly, and counter steer
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| show | Brake firmly while slowly moving forward
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| show | It is shaped like the letter “S”
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| How do you adjust a manual slack adjusters? | show 🗑
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| In controlled braking, you: | show 🗑
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| show | Turn off the engine, release the parking brake, and let the system settle
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| Before starting down a hill, you should be in the proper gear: | show 🗑
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| show | 1/2
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Created by:
zedoc43