AIR BRAKES CDL PRACTICE TEST - NEBRASKA
11.
Typically an air system is fully-charged at:
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75 psi
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125 psi
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250 psi
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25 psi
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12.
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 gear that will cause your brakes to overheat.
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to a speed that you can control without using the brakes hard.
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13.
Some air brake systems have an alcohol evaporator. Checking the alcohol container and filling it up as necessary:
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reduces the risk of having an accident due to drowsy driving.
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helps keep the engine cool, as well as lubricating it.
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helps you avoid wheel lock up.
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reduces the risk of ice in air brake valves during cold weather.
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14.
The service brake applies and releases:
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the parking brake when you use the parking brake control.
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the brake when you use the brake pedal during normal driving.
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the brake in an emergency situation.
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None of the above.
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15.
Before driving a vehicle with a dual air brake system, you should allow time for the air compressor to build up a minimum of ____ pressure in both the primary and secondary systems.
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50 psi
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150 psi
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100 psi
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35 psi
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