WASHINGTON CDL AIR BRAKES PRACTICE TEST
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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 Washington CDL knowledge test. The WA 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 Washington CDL Manual. Take this WA CDL practice test now to prepare for the actual air brakes test!
1.
With the air pressure built up to governor cutoff, the maximum leakage rates per minute after the initial pressure drop are:
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1 psi for single vehicles and 2 psi for a combination of 2 vehicles.
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5 psi for single vehicles and 6 psi for a combination of 2 vehicles.
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3 psi for single vehicles and 4 psi for a combination of 2 vehicles.
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2.
If stopped on a hill, how can you start moving without rolling back?
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Partly engage the clutch before you take your right foot off the brake, put on the parking brake if necessary.
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Press on the gas pedal, even if you have to roll back a little.
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Release the parking brake before you have applied enough engine power to keep from rolling back.
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3.
Front wheel braking is good:
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only in wet conditions.
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under all conditions.
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Never.
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4.
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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5.
Hydroplaning is more likely if:
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tire tread is worn.
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tire pressure is low.
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All of the above.
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