Knowledge Test Class B

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.. Read More

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. Test questions come from the Commonwealth of Pennsylvania Commercial Driver’s Manual. Questions come from chapters covering: Driving Safely and Transporting Cargo Safely. Endorsements that may be used with a Class B CDL are: Hazardous materials, Tank, Passenger, HazMat and Tank, Air Brakes and School bus.

Number of Question
Passing Score

1. Which of the following is not a backing maneuver that you will be asked to perform during the basic control skills test?

Explanation
Backing maneuvers that may be included in the basic vehicle control skills test include straight line backing, offset back/right, offset back/left, driver side parallel parking, conventional parallel parking, and alley docking.

2. Both systems in a dual air brake systems share:

Explanation
Both systems in a dual air brake system share a single air compressor. If the air compressor is damaged, neither system will be able to operate properly.

3. Cargo inside a trailer:

Explanation
Cargo needs to be secured appropriately to prevent it from moving in transit. Cargo should be arranged to keep the vehicle's center of gravity low and well-distributed.

4. If transporting 30 feet of cargo on a flatbed trailer, you should use a minimum of ____ to restrain the cargo.

Explanation
When transporting cargo on a flatbed trailer, you should use at least one tie-down for every 10 feet of cargo. Any cargo, no matter how small, should be restrained by a minimum of two tie-downs.

5. Eating while driving:

Explanation
To reduce the chances of driving distracted, you should avoid eating, drinking, or smoking while driving. Anything that diverts attention from the task of driving is a distraction.

6. When looking under your vehicle's hood during a pre-trip inspection, you should:

Explanation
Before inspecting under a vehicle's hood, make sure the parking brake is engaged and/or the wheels are properly chocked.

7. The air pressure in a dual air brake system should build from 85 to 100 psi within:

Explanation
When inspecting a vehicle with a dual air brake system, you should wait for air pressure to build from 85 to 100 psi in both the primary and secondary systems. This should take about 45 seconds.
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