FL CDL AIR BRAKES PRACTICE TEST
6.
The safety relief valve is usually set to open at ____ psi.
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50
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75
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150
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100
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7.
If you get stuck on the railroad tracks, the first thing you should do is:
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stay in your vehicle and call 911.
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scream for help.
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try to move your vehicle until you see the train.
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immediately get out of the cab and move away from the tracks.
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8.
Why should you check your mirrors regularly to know where other vehicles are around you?
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To flash the brake lights if you are being tailgated.
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To know whether you can make a quick lane change in an emergency.
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To better assess your own speed.
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To move out of their way if they want to get past.
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9.
The trailer hand valve should:
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never be used for parking.
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be used in driving.
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never be used to test the trailer brakes.
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All of the above.
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10.
Air tank drains:
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are used to move air to the brakes.
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protect the tanks and the rest of the system from too much pressure.
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are used to remove water and oil from the air tanks.
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should not be used in wet weather.
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