AIR BRAKES CDL PRACTICE TEST - CALIFORNIA
6.
Air tanks must be drained completely to:
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remove all moisture and oil.
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remove all the air.
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pump water and compressor oil into the tanks.
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7.
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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8.
Vehicles with air brakes require more stopping distance than vehicles with hydraulic brakes. Why?
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It takes one half second or more for the air to flow through the lines to the brakes.
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Stopping distance for vehicles with air brakes is made up of six different factors.
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Air brakes use different brake drums.
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9.
If your ABS is not working:
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the drive wheels will begin to spin, and you should take your foot off the accelerator.
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you still have normal brake functions, and should drive and brake as you always have.
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it will slow your truck to a halt and force you to pull over.
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10.
In some vehicles a modulating control valve may be used to:
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apply the spring brakes gradually.
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decrease the pressure in the brake system.
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apply the front brakes.
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