FREE IN CDL Combination Test (2024)

1. If an aggressive driver is involved in an accident down the road, you should:

try to get their vehicle to the side of the road.
make eye contact with the driver.
confront the aggressive driver.
stop a safe distance from the accident scene, wait for the police and report the behavior you witnessed.

2. When driving a combination vehicle, which of the following 2 things will help you prevent a rollover?

Keeping cargo near the ground and driving slowly on the highway.
Keeping cargo near the center of the vehicle and driving slowly on the highway.
Keeping cargo near the center of the vehicle and driving slowly on turns.
Keeping the cargo near the ground and driving slowly around turns.

3. Radial and bias-ply tires:

should be used together only during bad weather.
should be used together only when driving in packed snow.
should be used together.
should not be used together.

4. In combination vehicles with air brakes, the trailer air supply control:

is used to control the tractor protection valve.
is a coupling devices used to connect the service and emergency air-lines from the tractor to the trailer.
is used to keep the trailer behind the tractor.
supplies air to the trailer air tanks.

5. The service line:

carries power steering fluid to control the trailer brakes.
carries air and is connected to relay valves which allow the trailer brakes to be applied more quickly.
carries air to the parking brake to control the trailer brakes.
None of the above.

6. What are the two basic reasons for covering cargo?

To protect people from spilled cargo and the cargo from pilferage.
To protect the cargo from pilferage and from weather.
To protect people from spilled cargo and the cargo from weather.
To protect the cargo from weather and to avoid littering.

7. On front tires, tread should be at least:

8. Most hydraulic brake failures occur for one of two reasons, one of which is:

excessive downshifting.
loss of hydraulic pressure.
driving in cold weather.
relying too much on the engine braking effect.

9. How many red reflective triangles should you carry?

10. Transporting hanging meat requires special attention. Why?

Because you have to drive fast to get it delivered fresh.
Because refrigerated trucks have less traction.
Because hanging meat can be an unstable load with a high center of gravity.
All of the above.

IN CDL COMBINATION PRACTICE TEST