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The air brakes endorsement applies to applicants who wish to drive a vehicle with air brakes in Class A, B, or C CDL. To drive a vehicle with air brakes, you must pass the air brake component of the Georgia CDL knowledge test. The GA CDL air brakes test consists of 25 questions, and you'll need at least 20 correct answers to pass (80%). The test covers the information found in the air brakes section of the Georgia CDL Manual. Take this GA CDL practice test now to prepare for the actual air brakes test!
1.
If your vehicle catches fire, you should pull over:
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in an open area.
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at a service station.
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near other vehicles.
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near trees.
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2.
When you release the brake pedal, the _____ rotates back and a spring pulls the brake shoes away from the drum.
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hydraulic brake system
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air compressor belt
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S-cam
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pressure gauge
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3.
By pushing the trailer air supply control knob in, you:
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shut the air off and put on the trailer emergency brakes.
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keeps air in the tractor or truck brake system.
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supply the trailer with air.
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supply the tires with air.
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4.
As part of your vehicle inspection, you are checking that air flows to all trailers. After using the trailer handbrake to provide air to the service line, you go to the rear of the rig. When you open the emergency line shut-off valve at the rear of the last trailer, you should hear:
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a mechanical vibration.
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a thumping sound.
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air escaping from the open valve.
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the service line valve close.
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5.
When driving on slippery roads, you should NOT:
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use the engine brake.
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try to anticipate stops early.
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go slowly.
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watch far enough ahead to keep a steady speed.
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6.
The safety relief valve is usually set to open at ____ psi.
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100
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50
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150
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75
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7.
If the spring brakes do not release when you push the trailer air supply control, you should:
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check the electrical cables.
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rev or
lug the engine.
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check the air line connections.
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pump the brakes.
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8.
When is it safe to leave your vehicle unattended without applying the parking brakes or chocking the wheels?
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When the tank pressure falls to the "cut-in" pressure.
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Only while you are taking a rest break.
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When you are conducting your pre-trip inspection.
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Never.
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9.
A low air pressure warning signal is required on:
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all vehicles with air brakes.
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all vehicles with air brakes built after 2009.
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all vehicles with air brakes built after 2005.
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Warning signals are optional.
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10.
Brake drums or discs must not have cracks longer than ____ the width of the friction area.
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1/3
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1/4
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1/2
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1/5
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