SD CDL Combination Practice Test (2024)

1. A vehicle inspection should be done in the same order each time:

because the report must be written in that order.
so you are less likely to forget something.
because it is required by law.
because it's much quicker.

2. If you are feeling sleepy, you should:

pull off the road and rest or take a nap.
increase your speed to get to the destination quicker.
slow down and drive on the shoulder of the road.
None of the above.

3. When using a fire extinguisher, you should stay:

at whatever distance you think is safe.
at least 10 feet away from the fire.
as far away from the fire as possible.
as close to the fire as possible, without getting burnt.

4. Which of the following is NOT part of a trailer air line system?

5. If the drive wheels start to skid:

push in the clutch to let them turn freely.
use the brakes to slow down.
accelerate slightly to regain control.
All of the above.

6. If a load is placed on one side of the trailer:

a rollover is more likely.
your brakes won't work.
the steering axle weight will be too light to steer safely.
making turns may be easier.

7. The tire load rating is stated:

inside the suspension system.
on each axle.
on the side of each tire.
on the dashboard.

8. If you have a manual transmission, when stopping don't _______ until the engine rpm is down close to idle.

place the transmission in park
apply the brakes
shift to second gear
push the clutch in

9. An Anti-lock Braking System:

lets you brake faster.
increases a vehicle's stopping power.
keeps your wheels from locking when you brake hard.
increases the distamce required to stop on slippery surfaces.

10. Combination vehicles have __ air lines.

CDL COMBINATION PRACTICE TEST (SD)