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30 Cards in this Set
- Front
- Back
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The air compressor governor controls |
When the air compressor will pump air into the storage tanks |
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Which brake system applies and release the brakes when the driver uses the brake pedal? |
The service brake system |
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When a failure occurs in the service brake system the system you need to stop the vehicle is |
The emergency brake system |
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Three different systems are found on modern air brake system, service brakes, the brake and |
Emergency brakes |
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If your vehicle has an alcohol evaporator, it is there to? |
Reduces the risk of ice in the air brake valves in cold weather |
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Oil and water usually collect in compressor air tanks, if Tyson not have automatic tank drains when should you drain the air tanks |
After every working day |
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The brake pedal |
Controls the air pressure applied to operate the service brakes |
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If your vehicle is equipped with an alcohol evaporator every day during cold weather you should |
Check and fill the alcohol level |
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Which of the following is ok to find in the air brake system |
Oil Air Water All of the above |
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Why drain water from compressed air tanks? |
Water can freeze in cold weather and cause brake failure |
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The most common type of foundation brake found on heavy commercial vehicle is |
S-can drum |
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The air supply pressure gauge shows the driver how much pressure |
Is available in the air tanks |
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When using the parking brake or emergency brake what type of pressure is being used |
Spring pressure |
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Air brake equipped vehicle must have |
An air pressure gauge to show the pressure available for braking |
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You can tell if your vehicle is equipped with antilock braking system if there is a ———malfunction lamp on the dash board |
Yellow |
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The application pressure gauge shows the driver how much pressure |
Is being applied to the brakes |
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The vehicle must have a warning device which comes on before the air pressure in the service air tanks falls below |
60 psi |
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What can legally hold a parking or emergency brake in position for a truck, truck tractor, or bus? |
Spring pressure |
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What turns on the electrical stop light switch in an air brake system |
Air pressure |
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If your truck or bus has a dual |
Whenever you park the vehicle |
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What will determine how effective the spring emergency brake or the parking brakes are working |
Depends on the adjustment of the service brakes |
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If your truck or bus has a dual parking control valve you can use pressure from a separate tank to |
Release the emergency brakes to move a short distance |
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Your vehicle has a dual air brake system, if a low air warning pressure comes on for the secondary system, you should |
Stop, safely park, and continue only when the system is repaired |
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Of the choices below, the first thing to do when the low air pressure warning comes on is |
Stop and safely park as soon as you can |
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When does the drivers manual advise disconnecting the steering axle brake to help keep the unit straight? |
Never |
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How would you use the stab braking technique during emergency braking |
Brake hard with the pedal until the wheels lock, then let off until the wheels start rolling again |
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On a heavy vehicle, the emergency brake is usually held in place by spring pressure air pressure can leak away |
True |
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The color of the parking control knob on the dash of the vehicle is—- |
True |
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A tractor, truck or bus equipped with antilock braking system |
Is used on wet pavement |
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During normal driving, parking and emergency brakes are usually held back by |
Air pressure |
