Class A CDL Practice Test 1

Questions and Answers

How does doubling your speed from 20 mph to 40 mph affect braking distance?

It increases slightly

It stays about the same

It quadruples (correct)

It doubles

Before driving a vehicle with a dual brake system, the driver should:

Let the vehicle warm up to ensure the fuel reaches the engine

Test each brake system separately (correct)

Begin driving just after the vehicle starts

Pump the pedal about 20 times to build pressure

A serious traffic violation involves each of the following offenses except:

Not stopping behind the stop line at a stop sign

Improper lane usage

Using a cellphone (correct)

Having multiple licenses

If using a helper when backing a vehicle, where should the helper be located?

Near the back of the truck Signup and view all the answers

Tar in the road pavement often rises to the top in very hot weather. Spots where the tar 'bleeds' are:

Very slippery Signup and view all the answers

A driver should always:

Have an emergency plan Signup and view all the answers

Study Notes

Braking Distance

Doubling speed from 20 mph to 40 mph quadruples braking distance.
Important to consider how speed affects stopping time and distance for safe driving.

Dual Brake System

Drivers must test each brake system separately before using a vehicle with dual brakes.
Ensures that both systems are functioning correctly for safety.

Serious Traffic Violations

Serious traffic violations include having multiple licenses, using a cellphone while driving, and not stopping behind the stop line at a stop sign.
Improper lane usage is not considered a serious traffic violation.

Backing a Vehicle

When using a helper while backing up, the helper should be located at the front on the driver side for optimal visibility.
Ensures better communication and safety during maneuvers.

Road Conditions and Tar Bleeding

Tar may rise to the surface in hot weather, creating very slippery spots on the road.
Drivers should exercise caution around these areas as they can significantly reduce traction.

Driving Best Practices

Drivers should always stay in their lane for safety and predictability.
Having an emergency plan is crucial for dealing with unexpected incidents on the road.

Description

Prepare for your Class A CDL with this practice test focused on essential driving knowledge. This quiz covers critical aspects such as braking distances and dual brake systems, ensuring you have the necessary information for safe driving. Test your understanding and enhance your readiness for the CDL exam.