CDL AIR BRAKES PRACTICE TEST - ALABAMA
6.
You are driving on a steep downgrade. If your safe speed is 35 mph, you should apply the brakes when your speed reaches:
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25 mph
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30 mph
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45 mph
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35 mph
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7.
The safety relief valve is located:
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on the dashboard.
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in the first tank the air compressor pumps air to.
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on each end of the vehicle's axles.
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in the front brake.
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8.
You are coming down a long, steep downgrade. Which of the following is a sign that your brakes may have started to fade?
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You have to apply your brakes harder and harder to get the same stopping power.
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The brake pedal feels spongy or goes to the floor.
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You hear a loud "bang".
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The steering feels heavy.
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9.
In a vehicle with a dual air brake system:
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both systems typically operate the regular brakes on the rear axle.
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each system has its own air tanks.
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one system supplies air to the trailer.
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All of the above.
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10.
Before starting down a hill, you should slow down and shift down:
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so you can coast downhill.
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to a gear that will cause your engine to exceed its redline.
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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 brakes to overheat.
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