AIR BRAKES CDL PRACTICE TEST - ILLINOIS
21.
An ABS system:
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gives you more control over the vehicle during braking.
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helps you avoid skids caused by over braking.
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keep your wheels from locking when you brake hard.
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All of the above.
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22.
In some vehicles a modulating control valve may be used to:
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decrease the pressure in the brake system.
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apply the front brakes.
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apply the parking brake.
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apply the spring brakes gradually.
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23.
If the drive wheels begin to spin when accelerating, you should:
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brake gently.
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set the parking brake.
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continue to accelerate.
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take your foot off the accelerator.
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24.
In vehicles with air brakes, water and compressor oil in the bottom of the air tank:
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should be drained completely.
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should not be removed.
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should be added regularly.
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None of the above.
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25.
At passive railroad crossings, even if there are active railroad signals that indicate the tracks are clear, you must _________ to be sure it is safe to proceed.
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listen, look and stop
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go, look and put the transmission in neutral
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stop, look, and listen
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go, stop and listen
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