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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.
Most heavy-duty vehicles use:
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hydraulic brakes.
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pressure brakes.
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solid brakes.
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air brakes.
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2.
You are coming down a long, steep downgrade. Which of the following is a sign that your brakes may have started to fade?
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The steering feels heavy.
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You have to apply your brakes harder and harder to get the same stopping power.
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The brake pedal feels spongy or goes to the floor.
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You hear a loud "bang".
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3.
To prevent rollover, you should:
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put the lightest parts of the cargo under the heaviest parts.
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place the cargo near the rear of the trailer.
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place the cargo near the front of the trailer.
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keep the cargo as close to the ground as possible.
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4.
The ________ brake system applies and releases the brakes when the driver uses the brake pedal during normal driving.
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parking
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emergency
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service
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anti-lock
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5.
In air brake vehicles, the parking brake should be used:
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when the spring brakes are on.
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to hold your speed while going downhill.
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any time you park (with a few exceptions).
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as little as possible.
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6.
Spring brakes are usually held back by:
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the brake pedal.
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air pressure.
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the antilock braking system.
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modulating control valves.
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7.
When the spring brakes are on, you should never:
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upshift.
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change lanes.
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decrease your speed.
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push the brake pedal down.
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8.
The safety valve is usually set to open at:
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100 psi
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150 psi
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125 psi
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200 psi
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9.
The tire load rating is stated:
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on the side of each tire.
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inside the suspension system.
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on the dashboard.
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on each axle.
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10.
In vehicles with air brakes, the two markings on a front brake limiting valve are:
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normal and slippery.
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left and right.
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high and low.
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wet and dry.
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