CDL 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. Passive railroad crossings:
should never be crossed using a CMV.
have at least one traffic control device.
do not have traffic control devices.
2. You should check air pressure and temperature gauges:
at the end of each trip.
as often as is practical.
at the beginning of each trip.
3. How do you check that spring brakes come on automatically?
Continue to step on and off the brake pedal until the air pressure falls to the manufacturer’s specification.
On a tractor-trailer combination vehicle, continue to step on and off the brake pedal until the tractor protection valve and the parking brake valve close.
All of the above.
4. The __________ keeps air from going out if the air compressor develops a leak.
emergency relay valve
one-way check valve
tractor protection valve
5. Empty trucks have the best braking. True or False?
True.
False.
It depends on the cargo.
6. If the low pressure warning signal doesn't work:
this could cause sudden emergency braking in a single-circuit air system.
you could lose air pressure and you would know it.
None of the above.
7. Your vehicle has a dual air brake system. If one air system is very low on pressure, you should:
call your dispatcher or supervisor for instructions.
reduce your speed and check the low air pressure warning signal for the other system regularly.
bring the vehicle to a safe stop, and have the air brakes system fixed.
8. Which of the following statements is true?
Poor cargo ventilation is a common cause of fire.
Carrying a properly charged and rated fire extinguisher will help prevent fires.
There is no way that short circuits due to damaged insulation can cause a vehicle fire.
9. The safety relief valve is usually set to open at ____ psi.
75
50
150
10. Air tank drains:
are used to remove water and oil from the air tanks.
should not be used in wet weather.
protect the tanks and the rest of the system from too much pressure.
 
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Frequently Asked Questions

You must be at least 15 ½ years old to apply for a learner permit in Washington. However, if you're enrolled in an approved driver-training course, you can pre-apply at 15. For an intermediate driver license, you must be between 16 and 18 and hold the permit for six months. Once you turn 18, you can get a standard driver license.

First of all you must pre-apply online to obtain a Washington driver's license number. After completing the process, you can schedule an appointment for the DMV written test at the nearest Washington driver’s license office or at a driver training school. 

You need to bring these documents to a driver's license office:
  • One or two proofs of identity to show your name and date of birth. 
  • Proof of Social Security Number.
  • Proof of address.
  • Parental Authorization Affidavit form signed by your parent in front of a notary public (if you're a minor and they can't come with you).
Check the list of acceptable documents here.

The DMV written test in Washington is offered in English and Spanish. It is advisable to have a basic understanding of English since road signs are always in English. 

The DMV written test is based on the Washington Driver's Handbook. You can find the manual in other languages here. Read each section and test your preparation with our free practice tests.

The Washington DMV written test comprises 40 questions. It is designed to evaluate your knowledge of general driving laws, safe driving practices, and road signs. Take your time during the exam to fully understand each question before answering. 

To pass the exam, you need a score of 80% or higher. You should get at least 32 questions right, and you're allowed to miss up to 8 questions out of the total 40. Stay focused and take the time to read the questions thoroughly.
When driving with a learner permit, you must be accompanied by a licensed driver in the front passenger seat who has at least 5 years of driving experience. Once you obtain an intermediate license, different driving restrictions apply:
  • You are not allowed to drive between 1 a.m. and 5 a.m. unless for agricultural work or if you're accompanied by a parent, guardian, or a licensed driver who is at least 25 years old. After one year without penalties, this restriction no longer applies. 
  • For the first six months, you cannot transport any passengers under 20, except for siblings. After this period, you can drive with no more than three passengers under 20, unless they are family members.
  • You cannot use a wireless device when driving, except in emergency situations.

The Washington learner permit is valid for one year initially. You have the option to renew it twice, paying a fee. You can renew your permit either online or by scheduling an appointment at a Washington driver's license office. It's important to note that your passing knowledge test score remains valid for two years. After this period, you must retake the DMV test to obtain another instruction permit.
If you fail your DMV written test in Washington, you might need to wait before trying again. Driving schools have their own rules about when you can retake the exam and whether you have to pay another fee. Sign up for DMV Premium to maximize the chance of passing on your first attempt.

WA CDL Air Brakes Test

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