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Air tanks are shared between both systems.
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|
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Each system has its own air tanks.
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|
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You must designate which system you are using.
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Washington CDL Permit Test - Knowledge Test Class B
(From the 2021 Washington CDL driver handbook)
| Number of questions: | 50 |
| Passing score: | 40 |
Directions:
This license is required for driving a single vehicle with a GVWR of more than 26,001 pounds, and a trailer not to exceed 10,000 pounds gross vehicle weight rating, or a vehicle designed to transport 24 or more people (including the driver). To receive this license, applicants must pass a 50-question test. To pass, applicants must answer 40 questions correctly. Each question has three possible answer choices. Test questions come from the Commercial Driver Guide. Questions come from chapters covering: Introduction, Driving Safely, Transporting Cargo Safely, Air Brakes (if applicable), Pre-Trip Vehicle Inspection Test, Basic Vehicle Control Skills Test and On-Road Driving. Endorsements that may be used with a Class B CDL are: Hazardous materials, Tank, Passenger, HazMat and Tank, Air Brakes and School bus.
Passing grade —
10 or fewer errors
advertising
1.
In a dual air brake system:
2.
What do air brakes use to make the brakes work?
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Compressed air
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|
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Outside air
|
|
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Non-compressed air
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3.
When it’s difficult to see, such as at dawn or dusk, a driver can increase their vehicle's visibility by:
|
Driving while using their lights.
|
|
|
Driving with their windows open.
|
|
|
Flashing their lights periodically.
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4.
When loading a trailer, weight should be:
|
Placed as high as possible.
|
|
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Placed as low as possible.
|
|
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Placed as far to the left as possible.
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5.
The minimum acceptable tread depth for rear tires is:
|
1/64 of an inch.
|
|
|
1/32 of an inch.
|
|
|
2/32 of an inch.
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6.
When approaching your vehicle as part of a pre-trip inspection, seeing fresh oil underneath the vehicle is:
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A good sign.
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Normal.
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A cause for concern.
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7.
When are people usually the least alert?
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In the morning
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|
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In the early evening
|
|
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Late at night
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