OKLAHOMA CDL AIR BRAKES PRACTICE TEST
21.
Before transporting sealed loads, you should check that:
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the load is properly secured.
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the seal numbers match the placard numbers.
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the load can be inspected.
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22.
To check the slack adjusters:
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Park on level ground and chock the wheels, release the parking brakes and pull hard on each slack adjuster. The slack adjuster shouldn't move more than one inch.
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check the air hoses connected to the brake chambers to make sure they aren't cut or worn.
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park downhill and see if the vehicle rolls.
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23.
Parking brakes are:
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not required on commercial vehicles with air brakes.
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required on all vehicles.
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not required on trailers.
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24.
To brake in a way that will keep your vehicle in a straight line and allow you to turn if it becomes necessary, you can use:
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the "stab braking" method.
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the "controlled braking" method.
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the "controlled braking" method or the "stab braking" method.
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25.
How do you check that spring brakes come on automatically?
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On a tractor-trailer combination vehicle, continue to step on and off the brake pedal until the tractor protection valve and the parking brake valve close.
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Continue to step on and off the brake pedal until the air pressure falls to the manufacturer’s specification.
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All of the above.
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