SOUTH DAKOTA CDL AIR BRAKES PRACTICE TEST
21.
The total stopping distance for vehicles with air brake systems is made up of __ different factors.
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2
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3
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4
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5
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22.
In air brake vehicles, the parking brake should be used:
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to hold your speed while going downhill.
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any time you park (with a few exceptions).
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when the spring brakes are on.
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as little as possible.
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23.
Which of the following is NOT a way to determine if your trailer is equipped with ABS (antilock braking system)?
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It was built after March 1, 1998.
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The letters "ABS" are printed on the side of the steering wheel.
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Wheel speed sensor wires are coming from the back of the brakes.
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It has yellow ABS malfunction lamps.
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24.
If your ABS malfunctions:
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the service brake will not work.
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you still have normal brake functions.
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the parking brakes will not work.
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you should immediately come to a complete stop.
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25.
What is the best way to test the low air pressure warning signal?
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pump the brakes until the air pressure drops below 45 psi.
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step on and off the brake pedal while the engine is running.
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Shut the engine off when you have enough air pressure, turn the electrical power on and step on and off the brake pedal to reduce air pressure to below 60 psi.
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All of the above.
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