A Combination Vehicle Can Not Lose Air Faster Than
A dual air brake system has two systems. What are they?
Definition
Primary system
Secondary system
TermA combination vehicle (tractor-trailer) air brake system cannot leak more than _____PSI per minute with the engine off and the brakes released.
DefinitionTerm
A straight truck or bus (single vehicle) air brake system cannot leak more than____PSI per minute with the engine off in the breaks released
DefinitionTerm
A vehicle with a dual air system
DefinitionWill have only one set of break controls
Term
Air pressure loss in a combination vehicle must not exceed 1 psi per minute one pressure in on the brake pedal.
True
false
DefinitionTerm
Air brake equipped vehicles must
DefinitionHave an air pressure gauge, to show the pressure available for breaking
TermAir loss in a single vehicle should not be more than_____(after the initial pressure drop) with the engine off in the brakes on.
DefinitionTerm
Air tanks should be drained at least
DefinitionTerm
Air brakes cool very slowly
True
False
DefinitionTerm
In a single air loss vehicle should not be more than_____(after the initial pressure drop) with the engines off and the brakes on.
DefinitionTerm
Air tanks should be drained at least
DefinitionTerm
Air brakes cool very slowly.
True
False
DefinitionTerm
The extra time that it takes for air brakes to work when compared with hydraulic brakes is due to the time it takes for air to flow. This is called…
DefinitionTerm
At 55 mph on dry pavement, the air brakes lag distant adds about 32 feet to total stopping distance.
True
False
DefinitionTerm
Drum brakes are the only type of breaks in which brakes fade occurs.
True
False
DefinitionTerm
During normal operations, the parking and emergency brakes are usually held back by…
DefinitionTerm
Effective breaking distance is…
DefinitionThe distance your vehicle travels after the brakes actually apply
TermEmergency brakes are activated…
DefinitionBy a loss of air pressure
TermHow do you check the free play in manual slack adjusters?
DefinitionPork on level ground, chock wheels, released the parking brakes, and pull slack adjuster.
TermIf the air system should develop a leak, what will keep the air in the tanks?
DefinitionTerm
If you have a dual air brake system and a low air pressure warning is activated, you…
DefinitionMust stop in safely park your vehicle in get air system inspected and repaired.
TermIf your truck does not have a dual air system in an emergency brake line ruptures…
DefinitionThe spring breaks will come on
TermIf your vehicle is equipped with an alcohol evaporator, every day during winter weather you should…
DefinitionCheck the alcohol level and feel the evaporator, if needed
TermIf your vehicle has an alcohol evaporator, is there too…
DefinitionReduce the risk of ice in airbrake tanks, valves, and other parts in cold weather
TermIf your experience a sudden drop in the air system pressure you should…
DefinitionStop immediately when safe to do so
TermIf your truck or bus has dual parking turn valves, you can use pressure from a separate tank to…
DefinitionRelease the spring breaks to move the vehicle and an emergency
Term
If the lower air pressure warning comes on, you should stop in safely park your vehicle as soon as possible.
True
or
False
DefinitionTerm
If your vehicle pulls to one side while testing the service brakes, there may be a problem with the service brakes.
True
or
False
Term
In air brake equipped vehicles, use the parking brakes…
DefinitionWhenever you park the vehicle
Term
Modern air brake system used three combined parking system called service, parking, and emergency.
True
False
DefinitionTerm
On newer vehicles with air brakes, the parking brake control is…
DefinitionA diamond-shaped, yellow, push-pull control
TermParking or emergency brakes of trucks and buses can legally held
DefinitionTerm
Slack adjusters on S-cam brakes need adjustment if they move more than 2 inches where the push rod attaches.
True
or
False
DefinitionTerm
Some vehicles have a separate air tank which can be used to release the spring breaks
True
or
False
DefinitionTerm
The air compressor governor controls…
DefinitionWhen the compressor will pump air into the storage tanks
TermDefinition
Controls the air pressure applied to operate the brakes
TermThe braking power of the spring breaks…
DefinitionDepends on the service brakes being in adjustment
TermThe most common type of foundation break found on heavy commercial vehicles is
DefinitionTerm
The purpose of engine retarders is to…
DefinitionHelp slow the vehicle while driving and reduced break wear
TermThe air supply pressure gauge shows the driver how much pressure…
DefinitionIs available in the air tanks
TermThe spring breaks or emergency brake system…
DefinitionWill work only if the brakes are adjusted properly
TermA warning device which you can see must come on when the air supply pressure dropped below____PSI or one half the compressor governor cut out pressure on older vehicles
DefinitionTerm
The front brake limiting valves should be used…
DefinitionTerm
The air loss (after initial pressure drop) for a straight truck or bus with the engine off and the brakes applied should not be more…
DefinitionTerm
The alcohol evaporator condenses the air in the brake system
True
or
False
DefinitionTerm
The most common type of foundation break is S-
cam drum
True
or
False
DefinitionTerm
The tractor protection valve…
DefinitionIs also called the breakaway valve
Term
The governor is an air compressor regulator which controls when air the compressor will pump air into the air storage tanks
True
or
False
DefinitionTerm
The total stopping distance for an average driver at 55 mph under good traction and break conditions is about 150 feet
True
or
False
DefinitionTerm
The emergency brake on a heavy vehicle is usually held in place by spring pressure because air pressure Kim lost because of leakage
True
or
False
DefinitionTerm
The first tank the air compressor pumps air to have a safety relief valve installed to protect the tank and to the rest of the system from too much air pressure
True
or
false
DefinitionTerm
The breaking effects of the engine when going down a long and/or state downgrade may be supplemented by the use of the brakes
True
or
False
DefinitionA Combination Vehicle Can Not Lose Air Faster Than
Source: https://www.flashcardmachine.com/air-brakes.html
