FREE Colorado Combination Practice Test (2023)

1. If you begin to feel drowsy while driving, you should:

get some coffee.
open your window.
pull off the road and get some rest.
get an energy drink.

2. When should you use chocks to park a trailer without spring brakes?

3. Do NOT use the parking brakes:

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

4. When you use your mirrors while driving on the road, you should:

check them quickly.
only use the driver's side mirror.
avoid checking them regularly.
stare for a long time at the mirror.

5. When driving a 50 foot combination vehicle at 50 mph in ideal conditions, you should keep at least ____ seconds of space in front of you.

6. The best way to recognize that your trailer has started to skid is:

by seeing it in your mirrors.
by using retarders.
by hearing squeaking noises from the wheels.
None of the above.

7. When you are driving on a slippery road, you should NOT:

take curves at slower speeds.
use the engine brake or speed retarder.
adjust turning and braking to road conditions.
keep a longer following distance.

8. The proper following distance for a 60-foot vehicle traveling at 50 mph is:

9. When backing a trailer on a curved path you should back towards:

the driver's side.
the passenger's side.
either side.
neither side (back up straight).

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

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

CDL COMBINATION PRACTICE TEST COLORADO