AIR BRAKES PRACTICE TEST - WASHINGTON

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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. Air tanks must be drained completely to:
pump water and compressor oil into the tanks.
remove all moisture and oil.
remove all the air.
2. Which of the following is NOT part of the drum brake?
Safety valve
Axle
Brake drum
3. On any upgrade, gravity:
slows you down.
doubles your speed.
speed you up.
4. A passive railroad crossing is one that:
does not have any type of traffic control device.
requires you to stop and wait until the traffic control device installed at the crossing tells you to proceed.
has a traffic control device installed at the crossing to regulate traffic.
5. When backing a trailer, turn the wheel right to make the cab go ________ and the trailer go ________.
left; right
right; left
left; left
6. To check the slack adjusters:
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.
park downhill and see if the vehicle rolls.
check the air hoses connected to the brake chambers to make sure they aren't cut or worn.
7. In vehicles with air brakes, the air compressor governor:
controls how much air the air compressor will pump into the air storage tanks.
controls when the air storage tanks will pump air into the air compressor.
controls when the air compressor will pump air into the air storage tanks.
8. An Anti-lock Braking System (ABS):
lets you drive faster.
keeps your wheels from locking up when you brake hard.
increases your normal braking capability.
9. The supply pressure gauges tell you how much air pressure:
you are applying to the brakes.
is going to the brake chambers.
is in the air tanks.
10. If the air pressure gets too low:
the brakes will not work.
the brakes will lock up.
ABS will help maintain vehicle control.
 
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WA Air Brakes CDL Test

Number of questions: 25
Correct answers to pass:20
Passing score:80%
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