Knowledge Test Class B

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..

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 four possible answer choices. Test questions come from the Commercial Driver License Manual. 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:

When starting the vehicle during the pre-trip inspection, the coolant temperature should:

Explanation
After starting your vehicle during the pre-trip inspection, you should watch the gauges. The coolant temperature should gradually rise to a normal operating range.

If your vehicle is hydroplaning, you should:

Explanation
If your vehicle begins to hydroplane, do not apply the brakes. Instead, release the accelerator and push in the clutch. This will slow down your vehicle and help it regain traction.

When approaching a railroad crossing, you should:

Explanation
Reduce your speed as you approach a railroad crossing. Remember that you will not necessarily be able to hear a train, and don't assume that signals will warn you of its approach. Never try to outdrive an approaching train at a railroad crossing.

When driving down a steep grade, your brakes may fade. What happens if brakes fade?

Explanation
If you use your brakes too much when traveling on a steep downgrade, they may overheat and become less effective. To avoid causing your brakes to overheat on a steep hill, you should rely on engine braking.

When it is difficult for others to see your vehicle, such as at dawn or dusk, you can help other drivers by:

Explanation
At times when visibility is low, you should turn your headlights on to the low beam setting. If you are having a difficult time seeing others, they are probably having a difficult time seeing you.

Looking far ahead of your vehicle while driving is:

Explanation
Good drivers look down the road at least 12 to 15 seconds ahead of their vehicles. This makes it possible to identify hazards early, when drivers are more likely to have time to respond appropriately.

The height of a vehicle’s center of gravity:

Explanation
The height of a vehicle's center of gravity is very important to a driver's ability to safely handle the vehicle. Always distribute the weight of cargo as low as possible.
DMV Writen Test Logo