AIR BRAKES CDL PRACTICE TEST - TENNESSEE
6.
Your truck has a dual air system. If either system is very low on pressure:
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the low pressure warning signal will stop working.
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the tractor protection valve will not work properly.
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the ABS will not work properly.
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either the front or the rear brake will not be fully operational.
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7.
A passive railroad crossing is one that:
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has a traffic control device installed at the crossing to regulate traffic.
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has at least two traffic control devices installed at the crossing to regulate traffic.
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does not have any type of traffic control device.
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requires you to stop and wait until the traffic control device installed at the crossing tells you to proceed.
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8.
To control your speed on a downgrade, you should:
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fully apply the brakes.
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use controlled braking.
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use engine braking.
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coast in neutral.
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9.
In newer vehicles with air brakes, you put on the parking brake:
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using a P-shaped, yellow control knob.
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using a diamond-shaped, yellow, push-pull control knob.
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moving the orange push-pull lever to the right.
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placing the transmission in Park.
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10.
The braking power of the spring brakes:
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depends on the brakes being in adjustment.
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is not affected by the air pressure level.
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is not affected by the condition of the service brakes.
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All of the above.
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