AIR BRAKES CDL PRACTICE TEST - FLORIDA
21.
If you're feeling tired while driving you should:
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increase your speed to get to your destination quicker.
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drink coffee.
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eat something.
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stop driving and get some rest.
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22.
When is it safe to leave your vehicle unattended without applying the parking brakes or chocking the wheels?
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Only while you are taking a rest break.
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When the tank pressure falls to the "cut-in" pressure.
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When you are conducting your pre-trip inspection.
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Never.
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23.
At 55 mph, the total stopping distance for vehicles with air brake systems traveling in ideal conditions is:
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over 250 feet.
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over 450 feet.
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less than 150 feet.
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less than 250 feet.
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24.
How do you test hydraulic brakes for leaks?
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Pump the brake pedal three times, then apply firm pressure to the pedal and hold for five seconds. The pedal should not move.
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Pull forward against parking brake to make sure the hydraulic brakes holds.
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Pump the brake pedal ten times and see if it holds.
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None of the above.
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25.
To make the brakes work, air brakes use:
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compressed air.
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hydraulic air.
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nitrogen.
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carbon monoxide.
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