AIR BRAKES CDL PRACTICE TEST - ILLINOIS
6.
If you are driving a 30-foot vehicle at 55 mph, you should leave at least _____ between you and the vehicle ahead.
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3 seconds
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5 seconds
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4 seconds
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2 seconds
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7.
With a fully-charged air system, the leakage rates should be less than:
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3 psi for single vehicles and 4 psi for a combination of two vehicles.
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2 psi for single vehicles and 3 psi for a combination of two vehicles.
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5 psi for single vehicles and 4 psi for a combination of two vehicles.
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5 psi for single vehicles and 10 psi for a combination of two vehicles.
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8.
If your ABS malfunctions:
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you should immediately come to a complete stop.
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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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9.
When driving in very hot weather, the heat will increase the chances of:
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loss of hydraulic pressure.
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suspension system defects.
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tire failure.
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ABS malfunction.
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10.
A driver distraction is anything that takes your attention away from driving, such as:
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adjusting the radio.
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billboards.
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pedestrians.
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All of the above.
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