ARKANSAS CDL AIR BRAKES PRACTICE TEST
16.
Spring brakes:
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are not designed to work in an emergency when your service brakes fail.
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apply when air pressure leaves the brake chamber and release when air pressure builds up in the chamber.
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are air applied like service brakes.
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All of the above.
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17.
If your vehicle is hydroplaning, you should:
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use the brakes to slow down.
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release the accelerator and push in the clutch.
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accelerate to get through the water as quickly as possible.
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None of the above.
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18.
Spring brakes are usually held back by:
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the antilock braking system.
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modulating control valves.
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the brake pedal.
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air pressure.
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19.
Which of the following is not a type of retarder?
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Electric
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Exhaust
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Pressure
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Hydraulic
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20.
Before starting down a hill, you should slow down and shift down:
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to a speed that you can control without using the brakes hard.
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to a gear that will cause your engine to exceed its redline.
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to a gear that will cause your brakes to overheat.
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so you can coast downhill.
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