CDL Combination Test (2024) - FREE South Dakota CDL Practice Test

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

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

2. While driving, you should use your mirrors to:

know where other vehicles are around you.
check the condition of the tires and cargo.
check where the rear of your vehicle is while you make turns.
All of the above.

3. Strong winds can make it difficult to stay in your lane, especially when:

coming out of tunnels.
driving alongside other vehicles.
driving at speeds below 40 mph.
going into tunnels.

4. "Bobtail" tractors are:

tractors without semitrailers.
tractors with two trailers.
tractors with a tank.
heavily loaded trailers.

5. The service line:

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.
carries power steering fluid to control the trailer brakes.
None of the above.

6. During a trip:

you should watch gauges to make sure that valve caps are not missing.
you should not watch gauges as they can be misleading.
you should watch gauges for signs of trouble.
None of the above.

7. Empty trucks:

require a greater stopping distance than full trucks.
require a shorter stopping distance than full trucks.
require the same stopping distance than full trucks.
None of the above.

8. Air brakes:

are prohibited on larger vehicles.
should be used only when driving on wet roads.
are an effective way to stop large and heavy vehicles.
can improve fuel efficiency.

9. If your vehicle catches fire, you should pull over:

10. If you get stuck on the railroad tracks, the first thing you should do is:

try to move your vehicle until you see the train.
stay in your vehicle and call 911.
immediately get out of the cab and move away from the tracks.
scream for help.

COMBINATION TEST SOUTH DAKOTA - PRACTICE TEST