ROBERT AIR BRAKES

ROBERT AIR BRAKES

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Question Answer
Modern air brake systems combine three different systems. The systems are the service, parking, and _____brake systems Emergency
The driver must be able to see a warning before air pressure in the service tanks fall below ___psi 60
The brake pedal in an air brake system: Controls the air pressure applied to the brakes
Air braking takes more time than hydraulic braking because air: Takes more time to flow through the lines than hydraulic fluid
If your vehicle has a alcohol evaporator, it is there to: Reduce the risk of ice in air brake valves in cold weather
If your truck has dual parking control valves, you can use pressure from a separate tank to: Release the spring emergency parking brakes to move a short distance
To check the free play of manual slack adjusters on s-cam brakes, you should park on Level ground, chock the wheels, and turn off the parking brakes
Of the choices below, the first thing to do when a low air pressure warning light comes on is: top and safely park as soon as possible
The air compressor governor controls: When air is pumped into the air tanks
The braking power of the spring brakes: Depends on whether the service brakes are in adjustment
All vehicles equipped with air brakes have: A supply pressure gauge
1If you must make a emergency stop, brake so you: Can steer and your vehicle stays in a straight line
If you don’t have automatic tank drains, how often should you drain the oil and water from the bottom of the compressed air storage tanks? At the end of each day of driving
The application pressure gauge shows how much air pressure you: Are applying to the brakes
Your brakes are fading when You have to push harder on the brake pedal to control your speed on a downgrade
If your vehicle has an alcohol evaporator, everyday during cold weather you should: Check alcohol level and fill the evaporator if needed
Why should you drain water from compressed air tanks? Water can freeze in cold weather and cause brake failure
Your vehicle has a dual air brake system. If the low air pressure warning comes on for the secondary system, you should: Bring the vehicle to a safe stop and continue only when the system is fixed.
During normal driving, spring brakes are usually held back by: Air pressure
In air brake vehicles, the parking brakes should be used Any time the vehicle is parked
Emergency stab braking is when you Brake as hard as you can, release the brake when the wheels lock, then put the brakes on again when the wheels start rolling.
A straight truck air brake system should not leak at a rate more than___ psi per minute with the engine off and the brakes released. 2
The air loss rate for a straight truck with the engine off and the brakes on should not be more than 3 psi in one minute
The supply pressure gauge shows how much pressure Is in the air tanks
The brake system that applies and releases the brakes when the driver uses the brake pedal is the brake system Service
Before driving a vehicle with a dual air system, allow time for the air compressor to build up to a minimum of ______ psi pressure in both primary and secondary systems. 100
Total stopping distance for air brakes is longer than that for hydraulic brakes due to distance. Brake lag
The most common type of foundation brake found on heavy vehicles is the S-cam drum brake
Which of the following makes total stopping distance longer for air brakes than for hydraulic brakes: Brake lag
If the air compressor develops a leak, what keeps the air in the tanks? The one-way check valve

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