AIR BRAKES CDL PRACTICE TEST - VIRGINIA
16.
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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35 mph
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30 mph
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17.
The air tanks should be drained completely to remove:
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carbon monoxide.
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water and oil.
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air.
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18.
You must take the CDL skills tests in the type of vehicle for which you wish to be licensed. If your test vehicle does not have air brakes:
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you will be restricted to driving vehicles without air brakes.
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you'll have to immediately retake your test using another vehicle.
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you'll need to take another knowledge test about air brakes.
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19.
On any upgrade, gravity:
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doubles your speed.
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speed you up.
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slows you down.
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20.
Which of the following is not a type of retarder?
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Hydraulic
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Pressure
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Exhaust
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