In Partnership with William K. Kohrs Memorial Library
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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 Montana CDL knowledge test. The MT 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 Montana CDL Manual. Take this MT CDL practice test now to prepare for the actual air brakes test!
1.
To prevent rollover, you should:
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place the cargo near the rear of the trailer.
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keep the cargo as close to the ground as possible.
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put the lightest parts of the cargo under the heaviest parts.
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place the cargo near the front of the trailer.
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2.
To control your speed on a downgrade, you should:
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use controlled braking.
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coast in neutral.
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use engine braking.
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fully apply the brakes.
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3.
When should you be particularly careful about high winds?
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When emerging from a tunnel
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When going downhill
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When driving in winter
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When driving at night
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4.
When driving on slippery roads, you should NOT:
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use the engine brake.
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go slowly.
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watch far enough ahead to keep a steady speed.
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try to anticipate stops early.
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5.
Typically an air system is fully-charged at:
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125 psi
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25 psi
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250 psi
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75 psi
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