CDL Doubles Triples Practice Test (2024)

1. Do NOT use the parking brakes:

to test that they work.
if the brakes are very hot.
when you leave your vehicle.
when you park for less than two hours.

2. How far ahead do most good drivers look?

3. A low air pressure warning signal:

is required on vehicles with air brakes.
is optional on vehicles with air brakes.
is required on all vehicles without air brakes.
None of the above.

4. When driving trucks with trailers, drivers should:

push the brake pedal to the floor when braking.
avoid making sudden movements with the steering wheel.
decrease their following distance.
make quick lane changes.

5. If a load is 10 feet long, the minimum number of tie-downs required is:

6. When you double your speed, the braking distance is:

7. Containerized loads are used:

when the cargo exceeds the weight limit.
when transporting liquids.
when transporting explosives.
when the cargo has been or will be carried by rail or ship.

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

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

9. The trailer hand valve should be used:

to check that the fire extinguisher is charged.
to check that the trailer emergency brakes are on.
to check that the trailer is locked onto the tractor.
to test the trailer brakes.

10. You should be especially alert for drunk drivers:

SD CDL DOUBLES TRIPLES PRACTICE TEST