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Washington CDL Permit Test - Knowledge Test Class A

Number of questions: 50
Passing score: 40
Directions: This license is required for driving any legal combination of vehicles, with a gross combination weight rating of 26,001 pounds or more, provided the GVWR of a trailer exceeds 10,000 pounds. To receive this license, applicants must pass a 50-question test. Test questions come from the Commercial Driver Guide. To pass, applicants must answer 40 questions correctly. Each question has three possible answer choices. Questions come from chapters covering: Introduction, Driving Safely, Transporting Cargo Safely, Air Brakes (if applicable), Combination Vehicles, Pre-Trip Vehicle Inspection Test, Basic Vehicle Control Skills Test and On-Road Driving. Endorsements that may be used with a Class A CDL are: Hazardous materials, Tank, Passenger, Doubles/Triples, HazMat, Tank, Air Brakes and School bus.
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Passing grade —
10 or fewer errors
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1.

If you have more than one license:

You likely won’t be caught.
You should not tell anyone.
You may get caught through the states' shared computer network.
2.

If an air compressor is belt-driven, the belt should be routinely checked to ensure that it is:

Thin.
Properly tightened.
Cracked.
3.

When starting from a complete stop, a vehicle should:

Jerk forward.
Roll backwards.
Not move backwards.
4.

A safety valve is set to open at ____ pounds per square inch (psi).

100
150
200
5.

You will be denied a HazMat endorsement if:

You are a resident of the state in which you are applying.
You have no prior felony convictions.
You are considered to pose a threat.
6.

On a slippery surface, stopping distance:

Is longer than on a regular driving surface.
Is not as long as on a regular driving surface.
Is about the same as on a regular driving surface.
7.

Poisonous fumes can enter a cab due to:

A defective exhaust system.
Using the wrong type of fuel.
A lack of oil in the engine.
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