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6 Cards in this Set
- Front
- Back
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Why must air tanks be drained? |
Compressed air usually has some water and some compressor oil in it, which is bad for the air brake system the water and oil tend to collect in the bottom of the air tank. Be sure that you drain the air tanks completely. |
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What is a supply pressure gauge used for? |
These gauges tell you how much pressure is in the air tanks. |
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All vehicles with airbrakes must have a low air pressure warning signal. True or false? |
True. A warning signal you can see must come on before the air pressure in the tank falls below 60 psi. The warning is usually a red light, a buzzer may also come on. |
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What are spring breaks? |
All trucks, truck tractors, and buses must be equipped with emergency brakes and parking brakes. They must be held on by mechanical force. Spring breaks are usually used to meet these needs. |
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Front wheel brakes are good under all conditions. True or false? |
True. Tests have shown front wheel skid from breaking are not likely even on ice. |
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How do you know if your vehicle is equipped with antilock brakes? |
Look under the vehicle for the electronic control unit (ECU) and wheel speed sensor wires coming from the back of the brakes. |
