OREGON CDL AIR BRAKES PRACTICE TEST
21.
If you're feeling tired while driving you should:
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stop driving and get some rest.
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increase your speed to get to your destination quicker.
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eat something.
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drink coffee.
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22.
In a dual air brake system, if one air system is very low on pressure:
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the effect won't be noticeable for the first 50 miles.
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you should drive and brake as you always have.
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you should pump the brakes to restore pressure.
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either the front or rear brakes will not be operating fully.
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23.
The air compressor stops pumping air into the air storage tanks when air tank pressure rises to around:
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250 psi.
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125 psi.
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450 psi.
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100 psi.
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24.
Air pressure should build up in a single air system, within about:
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3 minutes.
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15 minutes.
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10 minutes.
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1 minute.
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25.
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 has yellow ABS malfunction lamps.
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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 was built after March 1, 1998.
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